Cansat 2008: University of Michigan Maizesat Final Presentation

Team Maize-Sat

The Final Presentation

Michael McCloskey, Lynn Yeng Wai Lau, Matthew Tse, Jake Graham, Devin Good, Anne Marinan, and Steven M. Kipus

June 15th, 2008

University of Michigan

Introduction

• Team roster and roles

• Presentation outline

2

Design Overview

Raw Data Plots

Processed/Analyzed Data

Outcome of Flight Ops/Failure Analysis

Comparison of Actual CONOPS to Planned CONOPS

Introduction

Team Roster & Roles

3

• Mike McCloskey – Payload Engineer

• Devin Good – Electrical Engineer

• Lynn Yeng Wai Lau – Programmer

• Jake Graham – Structural Engineer

• Matthew Tse – Telemetry Engineer

• Anne Marinan – Testing Engineer

• Steven Michael Kipus – Lead Engineer

Design Overview

Raw Data Plots




Introduction

Team Purpose

4

• To execute the NASA project life-cycle: Design, Test, Build and Fly

• To gain experience working on an engineering team

• To win the 2007-2008 CanSat Competition

Design Overview

Raw Data Plots




Introduction

Presentation Outline

• Design Overview• Raw Data Plots• Processed/Analyzed Data Plots• Outcome of Flight Ops/Failure Analysis• Comparison of Actual CONOPS to Planned

CONOPS

5

Design Overview

Raw Data Plots




Introduction

Design Overview

• Planned Design

• The Actual DesignDesign Overview

Raw Data Plots




Introduction

6

7

Bottom view with inserted components(center of mass located in the middle)

BuzzerGPS

Circuit Board Modem

BatteryPressureSensor

Antenna

motor

Side view with inserted components

Sonar device

Planned Design as of CDR

Design Overview

Raw Data Plots




Introduction

8

Planned Design Cont’d

Diametric view

Front view

Holes for parachute strings

Design Overview

Raw Data Plots




Introduction

The Actual Design• Added two Honeywell absolute pressure sensors as well as

two temperature sensors– Unable to provide a steady 400 mV busline to use as a voltage

comparator for the mV output Omega pressure sensor– Honeywells output ~0.2 - 5 V analogue signal

• Rearranged components – Failure to 3D model the microcontroller and socket– Failure to conceptualize and design mounting brackets

• Removed the GPS– Could not interface with the microchip– Broke the data logger a week before competition

• Changed then removed the method of onboard data storage– Planned on using EEPROM to store data– Decided on using SD data logger for simplicity’s sake

• Changed the flight software (cont’d in later slides)– Redundant data transmissions were deemed unnecessary– Decided to base the flight plan on the CanSat being inside or out

o the rocket rather than the pressure/altitude readings

Design Overview

Raw Data Plots




Introduction

9

Planned Software vs Actual

Design Overview

Raw Data Plots




Introduction • Use GPS to tell CanSat when to release parachute and turn off transmitter

• Transmit every piece of data twice

• We used the Sonar to determine when to release a parachute

• We didn’t transmit data two times

10

Raw Data Plots

Design Overview

Raw Data Plots




Introduction • Expected Data

• Pressure Sensor Callibration

11

Sample of Previously Collected Data

ÿ PH1: ÿ ÿ808ÿ ÿ PH2: ÿ ÿ812ÿ ÿ Temp1: ÿ ÿ53ÿ ÿ Temp2: ÿ ÿ56ÿ ÿ Sonar: ÿ ÿ99ÿ ÿ PO: ÿ ÿ1021ÿ ÿ PH1: ÿ ÿ808ÿ ÿ PH2: ÿ ÿ812ÿ ÿ Temp1: ÿ ÿ53ÿ ÿ Temp2: ÿ ÿ56ÿ ÿ Sonar: ÿ ÿ122ÿ ÿ PO: ÿ ÿ1021ÿ ÿ PH1: ÿ ÿ807ÿ ÿ PH2: ÿ ÿ812ÿ ÿ Temp1: ÿ ÿ53ÿ ÿ Temp2: ÿ ÿ55ÿ ÿ Sonar: ÿ ÿ143ÿ ÿ PO: ÿ ÿ1021ÿ ÿ PH1: ÿ ÿ807ÿ ÿ PH2: ÿ ÿ812ÿ ÿ Temp1: ÿ ÿ53ÿ ÿ Temp2: ÿ ÿ55ÿ ÿ Sonar: ÿ ÿ138ÿ ÿ PO: ÿ ÿ1021ÿ ÿ PH1: ÿ ÿ807ÿ ÿ PH2: ÿ ÿ812ÿ ÿ Temp1: ÿ ÿ53ÿ ÿ Temp2: ÿ ÿ55ÿ ÿ Sonar: ÿ ÿ137ÿ ÿ PO: ÿ ÿ1021ÿ ÿ PH1: ÿ ÿ807ÿ ÿ PH2: ÿ ÿ812ÿ ÿ Temp1: ÿ ÿ54ÿ ÿ Temp2: ÿ ÿ55ÿ ÿ Sonar: ÿ ÿ134ÿ ÿ PO: ÿ ÿ1021ÿ ÿ PH1: ÿ ÿ807ÿ ÿ PH2: ÿ ÿ812ÿ ÿ Temp1: ÿ ÿ54ÿ ÿ Temp2: ÿ ÿ55ÿ ÿ Sonar: ÿ ÿ133ÿ ÿ PO: ÿ ÿ1021ÿ ÿ PH1: ÿ ÿ808ÿ ÿ

Design Overview

Raw Data Plots




Introduction

12

Calibration of Pressure Sensor

Decreasing Pressure Increasing Pressure

Abs Pressure (mBar)Outpu

t Altitude (ft) Altitude (m) Abs Pressure (mBar)Outpu

t Altitude (ft) Altitude (m)

981.7 873 872.7052 266.0005 103.7 178 51178.53 15599.22

841.7 769 5043.481 1537.253 161.7 222 42864.85 13065.21

711.7 666 9454.175 2881.632 216.7 266 36988.88 11274.21

606.7 579 13522.02 4121.513 259.7 303 33188.73 10115.92

481.7 470 19187.49 5848.346 323.7 357 28383.92 8651.418

430.7 435 21847.29 6659.054 397.7 412 23707.64 7226.088

369.7 387 25386.86 7737.916 456.7 459 20461.23 6236.583

255.7 296 33519.75 10216.82 518.7 504 17397.24 5302.678

157.7 217 43352.54 13213.86 579.7 556 14659.7 4468.277

68.7 144 58281.3 17764.14 637.7 604 12265.29 3738.461

686.7 641 10376.23 3162.676

740.7 683 8416.883 2565.466

789.7 722 6736.652 2053.331

841.7 765 5043.481 1537.253

897.7 807 3312.288 1009.585

934.7 837 2215.872 675.3977

965.7 863 1323.992 403.5527

981.7 873 872.7052 266.0005

Design Overview

Raw Data Plots




Introduction

13

Analyzed Calibration of Pressure Sensor

Altitude above sealevel (m)

output from microcontroller

988.4896 810.0656

1034.406 806.135

1080.531 802.2012

1126.866 798.2642

1173.413 794.3243

1220.175 790.3814

1267.154 786.4357

1314.352 782.4872

1361.771 778.536

1409.415 774.5823

1457.284 770.6261

1505.382 766.6674

1553.711 762.7065

1602.273 758.7433

1651.072 754.7779

1700.109 750.8106

1749.387 746.8412

1798.909 742.87

1848.678 738.897

1898.697 734.9223

1948.967 730.946

0

100

200

300

400

500

600

700

800

900

1000

0 5000 10000 15000 20000

Altitude Above Sealevel (m)O

utp

ut

WhileIncreasingPressure

When Welaunch

Poly. (WhileIncreasingPressure)

Design Overview

Raw Data Plots




Introduction

14


• Launch time was postponed for ~3 hours due to technical malfunctions

• The CanSat flew on a rocket without transmitting any information

• A trace failed which was ultimately responsible for the failure of the flight

Design Overview

Raw Data Plots




Introduction

15

Outcome of flight Ops• Quasi-Complete Failure

– Cansat was built to correct correct geometric and mass specifications– Would not have been able to entirely detach parachute

• Parachute release rod was too long and snagged 3rd string• The rod was improperly initially secured in place with the strings

– Did not land upright• Deisgn remained the same even after prior tests showed that the design had a moderate probability of

failue• Fell faster than calculated and broke an end cap off

• Several Design Flaws– No external on/off switch led to wear on wires and connectors– We should have known our method of detaching parachute was doomed to failure based on

3D CAD design– Wires were not neatly tied to components which led to unwanted stresses on strains on

components• The last final failure hurt the worst

– Repeatedly proven and documented success transmitting data while in its operational configuration

– Lack of an external on/off switch led to repeated insertion/removal of cansat shelf• Sollid strand wire was used at the base of the PCB/SONAR connection• The SONAR groundand Power wires snapped above the epoxy reinforcement at the point of attachment

to the pcb• Uppon reparing the breaks in the wires, the microcontroller routine became unstable and wouldn’t

continuously function• The microcontroller ultimately failed and the CanSat was launched as a piece of beautifully painted

“Ballast”

Design Overview

Raw Data Plots




Introduction

16

Failure Analysis

• The lack of an external switch caused excessive shelf removal cycles which led up to what is believed to be an external resonator malfunction

• The board was tested for continuity between the crystal and the microprocessor and a high impedance was measured

• This mode of failure was preventable– We had a history of breaking single strand wires– This PCB had traces fail in the past due to repeated

soldering– In order to rectify the wire breaking problem, we replaced

the bulk of the single strand wire to multithread wire– Matt Tse directly told me that ALL the single stranded wire

should be replaced with multistrand wire but I refused out of laziness because I had already reinforced the single stranded wire with epoxy where it was soldered; I did not want to spend the 15 minutes removing cured epoxy from the connected wire/pads

Design Overview

Raw Data Plots




Introduction

17

The Culprit

Design Overview

Raw Data Plots




Introduction

18

Comparison of Actual CONOPS to planned CONOPS

• Launch day was different than anticipated

• Our late arrival was detrimental to the mission

• Plans were to have two people instead of only one

Design Overview

Raw Data Plots




Introduction

19

CDR Plans for Launch Day

20

Arrive at Launch Site - 3 hour

Ground Station Set up - 60 min

CanSat Testing - 30 min

Assigned to Launch Window ~ - 15 min

Integration with Rocket ~ - 10 min

Blastoff!!! 0

CanSat Apogee ~ + 10 sec

CanSat Deploys ~ + 12 sec

Parachute Deploys ~ + 13 sec

Data Collection ~ - 10 min – + 9 min

CanSat Recovery ~120 min

Pack up Ground Station After CanSat Recovery

Data Analysis After CanSat Recovery

Final Presentation Following Day

Design Overview

Raw Data Plots




Introduction

The Actual Launch Day

21

Arrive at Launch Site - 15 minutes


CanSat Massed - 2 min

CanSat Testing - 2 min until +50 min

CanSat Sonar Wire Breaks + 51 minutes

Blastoff Postponed + 1 hour

CanSat Sonar Wire Repaired + 1.2 hour

Integration with Rocket + 1.5 hour

CanSat Begins a Series of Failed Transmissions

+ 1.6 hour

CanSat Makes its Final Transmissions

+ 2 hour

Integration with Rocket #2 + 3 hour

Blastoff!!! +3.5 hour


Final Presentation Now

Design Overview

Raw Data Plots




Introduction

More CDR Plans for Launch Day: Action Items

22

Time Person A Person B

-3 hours Set up our table Set up computer systems

-30 minutes Hook up hardware and set up the ground antennas

Power up CanSat and run final tests

~0 minutes Begin gathering data from the CanSat

Begin gathering data from the CanSat

+10 minutes Analyze the GPS data to find landing site of CanSat

Make sure collected data is saved & secure

+15 minutes Clean up the table Begin searching for CanSat

+2 hours Return CanSat to storage and pick-up what’s left

Retrieve and save the onboard data

Design Overview

Raw Data Plots




Introduction

Conclusion

• The flight was a failure but the project was a success

• The team purpose was achieved

• U of M advisor says we had one of the best CanSats he’s seen when it was working

• Everybody learned many new skills throughout the project

23

24

Thank You Very Much

• Thank you to all advisors EXCOM for organizing and maintaining this program

• Thank you to the American Astronautical Society, American Institute of Aeronautics and Astronautics, and NASA for orchestrating this competition

• Thank you to all those who came before us

• Thank you to my team which works very hard on this project

25

Questions and Comments

• System related?

• Subsystem related?

• Critiques?

• Comments?

Team Maize-Sat

The Critical Design Review

Michael McCloskey, Lynn Yeng Wai Lau, Matthew Tse, Jake Graham, Devin Good, Anne Marinan, and Steven M. Kipus

April 24 , 2008

University of Michigan

26

Introduction

• Team roster and roles

• Presentation outline

Introduction

Schedule Overview

CanSat Overview

Mechanical/Structural Overview

Electrical Overview

Flight Software Overview

Integration and Test Overview

Ground System Overview

Mission Operations

Cost Estimates

27Presenter: Steve

Team Roster & Roles

28

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

• Mike McCloskey – Payload Engineer

• Devin Good – Electrical Engineer

• Lynn Yeng Wai Lau – Programmer

• Jake Graham – Structural Engineer

• Matthew Tse – Telemetry Engineer

• Anne Marinan – Testing Engineer

• Steven Michael Kipus – Lead Engineer

Introduction

Presenter: Steve

Presentation Outline

• CanSat Overview• Mechanical/Structural Overview• Electrical Overview• Flight Software Overview• Integration and Test Overview• Ground System Overview• Mission Operations• Cost Estimates • Schedule Overview

29

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Introduction

Presenter: Steve

CanSat Overview

• Requirements Overview

• Design Overview

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Steve 30

31Presenter: Steve

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Requirements MatrixID Requirement

ParameterMetric Compliance Verification Reference

SYS-01 Hardware Cost $500 USD for everything Complies Analysis CG3.3

SYS-02 Altitude CanSat deploys at 760m Anticipated Test CG1.0

SYS-03 Body No pre-fabricated CanSat Complies Analysis CG1.0

SYS-04 Descent TimeMust descend between 7 minutes and 2.75 minutes after deploying

Anticipated Test CG2.6

SYS-05 Descent RateDownward velocity between 4.6m/s and 1.8m/s

Complies Test CG2.1

STR-01 VolumeDiameter = 72.39mm Height = 279.4mm


STR-02 Mass 500g Anticipated Test CG2.5

STR-03 TouchdownMust land in predetermined upright position


STR-04 BodyNo protrusions until deployed from rocket

Anticipated Design CG2.1-3

STR-05Parachute Deployment

Must deploy before landing Anticipated Test CG2.9

STR-06Parachute Release

Parachute must release and not cover CanSat


PE-01Power Sustainability

Endurance of 2 hours Anticipated Test CG5.1

32

Requirements Matrix

Presenter: Steve

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

ID Requirement Parameter

Metric Compliance Verification Reference

TEL-01Radio Frequency

900 MHz and 2.4 GHz radios

Anticipated Design CG2.12

TEL-02 TransmitterTransmitter must turn off after landing

Anticipated Anticipated CG2.11

TEL-03 Data TransferOne transmission of altitude every 5 seconds

Anticipated Analysis CG2.8

TEL-04 Data Transfer Transmit redundant data Anticipated Test InternalTEL-05 Range Transmit data at least 3 km Anticipated Test Internal

CDH-01Data Processing

A microcontroller must be used

Complies Design Internal

CDH-02 Data AcquisitionAll data stored onboard Anticipated Test Internal

PLD-01 Data AccuracyWhile descending, record altitude within +-3m


PLD-02Ground Surface Temperature

Measure air temperature at ground level

Pending Test CG3.3

Designates bonus requirement

Designates Design Driver

Design Overview• Structure and Recovery

– Touchdown– Parachute Release

• Power and Electrical– Power Sustainability

• Telemetry• Sensors• Command and Data

– Data Processing

• Overall– Cost– Volume– Mass

33

Introduction

Schedule Overview


Electrical Overview




Mission Operations

Cost Estimates

CanSat Overview

Presenter: Steve

34

Subsystem Interaction

Presenter: Steve

Introduction

Schedule Overview


Electrical Overview




Mission Operations

Cost Estimates

CanSat Overview


35

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake

• Design Consideration

• Summary of PDR Changes

• Results of Preliminary Design/Analysis

• Mechanical/Structural Concept Drawing

• Preliminary Mass Budget

• Recovery System

• Preliminary Test Plan

Competition RequirementsParameter Requirement Compliance Reference

Fit in payload section

279.4 mm long

72.39 mm diameterAnticipate to

complyCompetition guide

LandingLand in defined upright

positionAnticipate to


Mass500 grams

(470 grams – internal)Anticipate to


Descent rate~1.8 m/s to 4.6 m/s

(7 minute total time)Anticipate to


Parachute

Detachment

Automatic upon landing without

covering CanSat

Anticipate to comply

Competition guide

CanSat deployment

Automatic due to gravity


Competition guide

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 36

37

Design Considerations• Strong frame to support internal electrical

components

• Antenna placement must achieve maximum reception

• Shape must be conducive to landing upright

• Heavy bottom side to ensure upright landing

• Reduce drift to aid in recovery

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake

Structural Design

• Use strong, lightweight carbon fiber material

• Place antenna on outside of cylinder to achieve better signal

• Cylinder provides rolling ability

• Insert “shelf” to support internal components

• Internal components arranged to achieve low center of mass

• Use parachute with spill hole

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 38

Summary of PDR changes

• Antenna placement– Swivel allows vertical position upon deployment

from rocket

• Decided on parachute design– Hexagonal with spill hole– Already available

• Parachute Release System– Motor pulling string attached to small rod– More effective– Sonar device triggers release instead of GPS

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 39

40

CanSat DesignIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Diametric view

Front view

Presenter: Jake

Holes for parachute strings

41

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

CanSat Design (Cont’d)

Bottom view with inserted components(center of mass located in the middle)

BuzzerGPS

Circuit Board Modem

BatteryPressureSensor

Antenna

motor

Side view with inserted components

Presenter: Jake

Sonar device

Design (Cont’d): FastenersIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 42

• Fasteners– U-bolt for parachute release device– Standard screws for components

Standard screws with cover plate U-bolt

Recovery Devices

• Visual– Bright, contrasting streamer and parachute

color will provide high visibility– Parachute: Public Missile Parachute

• Audio– Loud buzzer sound will be easily heard

• Position – GPS will send position of CanSat upon

landing

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 43

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

44

Parachute Release System

Presenter: Jake

• Parachute released within 1 meter of the ground

• Motor turns upon reaching specified height (known from Sonar Device)

• String pulls rod, releasing parachute strings that are held down by the rod

• Parachute strings enter cylinder through sides and through middle for stability

Parachute Release: MotorIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 45

• Servo• Manufacturer: Horizon Hobbey/JR• 331 Micro• 30243 g-f mm Torque

• Motor used is taken out of servo shell

46

Mass Budget

Introduction

Schedule Overview

CanSat Overview

Electrical Overview




Mission Operations

Cost Estimates


Presenter: Jake

Component Quantity Mass per Unit (g)

Subtotal Mass (g)

Contingency (%)

Net Mass (g)

Microcontroller Socket 1 1 1 10 1.1

Microcontroller 1 2 2 10 2.2

Serial Flash Memory 1 1 1 10 1.1

Proximity Detector 1 5 5 10 5.5

Pressure Sensor 1 4 4 10 4.4

GPS 1 22 22 10 24.2

Circuit Board 1 20 20 10 22.0

Battery 1 25 25 10 27.5

Voltage Regulator 1 2 2 10 2.2

Buck Converter 1 1 1 10 1.1

Boost Converter 1 1 1 10 1.1

Servo 1 18 18 10 19.8

Parachute Release Rod and Connectors

1 10 10 10 11.0

Antenna 1 40 40 10 44.0

Transceiver 1 21 21 10 23.1

Transceiver Socket 1 1 1 10 1.1

47

Mass Budget

Introduction

Schedule Overview

CanSat Overview

Electrical Overview




Mission Operations

Cost Estimates


Presenter: Jake

Component Quantity Mass per Unit (g)

Subtotal Mass (g)

Contingency (%)

Net Mass (g)

Structure Exterior (Carbon 2.5 Heavy)

1 40 40 10 44.0

Shelf and End-Caps 1 30 30 10 33.0

L Bracket 2 2 4 10 4.4

U Bolts 2 6 12 10 13.2

Screws 15 1 15 10 16.5

Relay 1 1 1 10 1.1

Inductor 2 1 2 10 2.2

Capacitor 4 1 4 10 4.4

Resistor 2 1 2 10 2.2

Buzzer 1 4 4 10 4.4

Subtotals - - 288 - -

System Reserve - - - - 50.0

Total with Contingency - - - - 366.8

Margin - - - - 133.2

Plans for Testing: Structure• Structural Integrity

– Drop weighted outer structure from a height around 1m

– Excessive shaking—make sure insides stay intact

• Parachute– Release 500g mass attached to parachute from

known altitude and measure time it takes to fall – Results: 8.82s from 34.6m 3.92m/s

• Parachute Release– Install mechanism and test– Measure parachute release time

• Buzzer– Turn on inside carbon fiber body and determine range

of sound

48

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake

Plans for Testing: Structure• SONAR

– Test functionality and implementation • Calibrate sensor to determine accuracy and most

sensitive range• Balance CanSat from parachute to ensure center of

mass is actually in the center

49

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake

Structural Work to be Completed

• Build and test design– Ensure mass is distributed to

concentrate center of mass in the middle and on bottom half

• Integrate all electrical components into structure

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 50

Electrical Overview

51

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

• Design Considerations

• Summary of PDR

• Electrical System Block Diagram

• Power System Overview

• Preliminary Power Budget

• Communications System Overview

• Processor Selection

• Sensor Selection

Presenter: Devin

Electrical Design Considerations and Requirements

• To provide the CanSat with enough power to run all of its components for at least two hours

• To design a circuit board that will connect all of the components in parallel

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 52

Summary of PDR Changes

• Circuit board completed• Relay instead of transistors• Step-Down Converter• Voltage Level Shifter

– Allows for communication between serial flash and microcontroller

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 53

Summary of PDR Changes (Cont’d)

• Decided to use AC4790-200m transceivers instead of AC4490-200m– 4790 already available to us

• SONAR Range Finder– More accurate distance measuring for

parachute release• 7.4V battery instead of 3.7V battery

– Easier to step down than up

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 54

Electrical System Block Diagram

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 55

KEY

Data

3.3V

5V

10V

7.4V

Battery 7.4 V

Sonar

Buzzer

GPS

MicrocontrollerBuck

Converter 5V – 3.3V

Transceiver

Boost Converter 5V – 10V

Voltage Regulator

5V

Level Shifter

Serial Flash

Servo

Relay

Pressure Sensor

Circuit Board Diagram

56

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Microcontroller

Buzzer

Level ShifterStep-up Converter

ServoGPS

RelayTransceiver

Step-up Converter

Pressure Sensor

Sonar

Serial Flash

Presenter: Devin

Power/Electrical Components

• Rechargeable Battery– Lithium Ion-Polymer 7.4V, 920mAh

• Voltage Converters– National Semiconductors LM3211– National Semiconductors LM3671

• Circuit Board– PCB123

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 57

Plans for Testing: Electric

• Multimeter – Find out how much voltage and current is

used by each part– Determine if relays work by measuring

change in current after switching voltage from low to high (and vice versa)

• Battery and Voltage Converter:– Run each piece of equipment with battery– Run the whole routine– Battery power down

58Presenter: Devin

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Plans for Testing: Electric (Cont’d)

• Pressure Sensor:– Use vacuum chambers to vary pressure

– Obtain different readings and calibrate sensor

– Write code for microcontroller to retrieve data

• GPS:– Connect the device to a computer

– Collect large amount of data at one position to evaluate accuracy

– 2-D plotter to get visual results

59Presenter: Devin

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Power Source Protection

60Presenter: Devin

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

• Capacitors:– Helps smooth out the voltage entering each

component

• Zener Diode:– Protects the boost converter

Power Budget: Components

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 61

Device No. of

items

Current (mA)

Running Voltage

(V)

Duty cycle

(% of 2 hours)

Contingency

Current with contingency

(mA)

mAh per

cycle

GPS 1 70 5 100% 15% 80.5 161.0

Transceiver 1 68 5 100% 15% 78.2 156.4

Sonar Range Finder 1 3 5 100% 15% 3.5 6.9

Microcontroller 1 28 5 100% 15% 32.2 64.4

Servo 1 60 4.8 10% 15% 69.0 13.8

Flash Memory 1 14.3 3.3 100% 15% 16.4 32.9

Pressure sensor 1 1.5 5 100% 15% 1.7 3.5

Buzzer 1 13 10 10% 15% 15.0 3.0

Voltage Converter (92% eff.) 1 5

Voltage Converter (90% eff.) 1 10

Denotes Estimate

62

Power Budget: CanSat Cycle

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin

Efficiency of voltage converter

Running Voltage

(V)

Duty Cycle Current with Contingency

(mAh)

mAh per cycle

Total current w/ 3.3V component 3.3 100% 16.4 32.9

Total current w/ 5V components 92% 5 85% 288.1 489.8

Total Current With 10V component 90% 10 85% 16.6 28.2

Total current w/ contingency (mA) ALL 304.7 550.9

Battery power (mAh) 920

Max number of cycles

1.7

Max. allowable duration (hours) 3.3

Electrical Work to be Completed

• Test individual components – Solder-less breadboard– Multimeter

• Battery endurance tests– Run entire system until battery depletes

• Order circuit board

• Solder everything to circuit board

• Test circuit board connections

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 63

Communication System Overview

• Requirements• System Block Diagram• Modem • Antenna• Plans for Testing• Range Testing Results• Communications Work to be

Completed

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 6464

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Parameter Details Compliance Reference

Radio Frequency

Must meet FCC regulations for use in 900 MHz and 2.4 GHz frequency bands


Competition Guidelines

Data Transfer Must transfer altitude data to ground station at least every 5 sec


Competition Guidelines

Data Transfer Transfer data every 2 seconds


Internal Requirement

Data Redundancy

Transfer the previous data from 2 sec ago in addition to new data



Range Transfer data over at least 3 km



Communication System Requirements

Communication System Diagram

Modem AntennaMicro-controller

GroundStation

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 66

TTL Waveform

Radio Wave

Modem

• AeroComm AC4790 -200M– Operates in 902 to 928 MHz ISM band– Uses Frequency Hopping Spread Spectrum– Serial Data Rate up to 115.2 kbps– RF Data rate 76.8kbps– 20-pin connector interface– MMCX connector to antenna– Free modem configuration software from

AeroComm website– FCC Certified

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Antenna

• Nearson S467FL-4-RMM-915 dipole– 2 dBi gain– 5 km range with the AC4790-200m

(theoretical)– Obtained two free samples

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


182.9mm

Plans for Testing: Communications

• Establish R/F link

• Determine realistic maximum range

• Range testing (at an open-field)– Determine bit error rate– Determine R/F link quality in various

terrain

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Range Testing Results

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


• Maximum 1.2 km achieved at low altitude• Problems

– Interference from hills, street lamps, cars, trees, and other obstructions

– Low laptop battery

Communications Work to be Completed

• Range and terrain testing• Assessing link quality• Integration with micro-controller

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


• Record and store data from other devices

• Transmit measurements to other devices in an organized manner

• Microcontrollers: Reduced size, power consumption and cost compared to any other form of control

Command and Data / Processor Selection

Presenter: Lynn 72

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Specifications of Microchip PIC18F4685

• Enhanced Addressable USART module

- Supports RS-485, RS-232, LIN 1.3, TTL

- Auto-Baud Detect

• MSSP module and I²C Master and Slave modes

• 11-Channel 10-bit Analog-to-Digital modules

Presenter: Lynn 73

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

74

Microcontroller Connections

Presenter: Lynn

Proximity Detector (3) Vout

GPS GlobalSat EM-406 (25, 26) TX, RX

Transceiver AC 4790 (35, 36) TX, RX

Power Supply (11,12) GND, Vcc

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Pressure Sensor PX70 (4) Vout

Relay (2) RA0

Transceiver AC 4790 (5, 6) AN3, external clock

Serial Flash via Level Shifter (18, 21, 23, 24) Serial Clock, PSP2,

SDI, SDO

Step-up Converter (34) AN8

Power Supply (31, 32) GND, Vcc

Transceiver AC 4790 (19, 20) PSP0, PSP1

Sensory Requirements

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike

Parameter Requirement Compliance Reference

Sample DataOnce Every 5

SecondsAnticipate to

complyCompetition

guide

Sample DataOnce Every 2

SecondsAnticipate to

complyInternal

Requirement

Data AccuracyWithin 3 meters


Competition Committee

RedundancyImplement A

Backup to The GPS



Proximity Detection

Within 1 meter of ground



75

Primary Sensor: GPS

• Primary method of obtaining altitude readings

• Optimal unit for obtaining this data– Simplicity – Compatibility with other subsystems

• GlobalSat EM-406

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike 76

30mmx30mmx10mm

Secondary Sensor: Pressure Sensor

• Secondary method of obtaining the altitude readings

• Pressure sensor is accurate• Fits well with our current design

• Omega PX71030AV

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike 77

9.14 mm x 5.84 mm x 19.81 mm

Proximity Detector: SONAR

• Our method to know our position above the ground so that the parachute can be deployed within 1 meter– Wide beam of detection

• LV-MaxSonar®-EZ1™– Can detect the ground

to an accuracy of ~0.03m up to a distance of 6m

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike 78


79

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

• Changes since PDR

• Design considerations and overview

• Programming integration plan

• Preliminary test plan

Presenter: Lynn

Flight software requirements

Presenter: Lynn 80

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Parameter Requirement Compliance Reference

Measurements Measurements of altitude

Compliant through GPS, pressure sensor and sonar.

CanSat competition guide

Data transmission Altitude transmitted to the ground every 2 seconds

Compliant through modem and microcontroller

Internal requirement built upon CanSat competition guide

Relevant and redundant data storage

Data stored onboard Compliant through microcontroller and serial flash

Internal requirement

Recovery Release parachute Compliant through microcontroller, sonar, motor

Internal requirement

Summary of Changes Since PDR

81

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Lynn

• Taken into account altitude tolerance• Updated data budget• Different serial flash manufacturer• Use SONAR for parachute release

instead of GPS data

Flight Software OverviewIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Lynn 82

Data Budget

Presenter: Lynn 83

Device Size per Sample (Bits)

Sample frequency

Sample Time (seconds)

Total Size (KBytes)

GPS Data- Numbers

512 2 every 2 seconds

1500 96

GPS Data- Characters

28*8 2 every 2 seconds

1500 7.5

GPS Identifiers 64 2 every 2 seconds

1500 12

Counters 48 2 every 2 seconds

1500 4.5

Pressure sensor Identifier

8

Pressure sensor 128 2 every 2 seconds

1500 24

Total Memory Needed 144 KBytes

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Onboard Data Storage

• Serial Flash– SST Electronics SST25VF040B– 512 KB storage

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

84Presenter: Lynn

Programming LanguageIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Lynn 85

• We chose to use C to program our Microcontroller

• Simple• All-purpose• Widely Employed• Many tutorials available and easily accessible

PICkit 2 Starter Kit

• Low cost, easy to use interface for programming microcontroller

• Comes with Microchip’s MPLAB IDE software that programs, assembles, compiles using C

Microcontroller SoftwareIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Lynn 86

Plans for Testing: Flight Software

• Microcontroller:– Try a basic program– Write procedures for components individually– Integrate procedures for flight software– Send data to transceiver– Oscilloscope—see if data is being transferred

• Serial Flash:– Write data onto component– Connect serial flash and microcontroller to

computer to retrieve data

87Presenter: Lynn

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Flight Software Future Work

• Continue programming the microcontroller

• Integrate the microcontroller with the GPS, Sonar, Pressure Sensor, Serial Flash, Modem

• Develop a code where the CanSat ignores the proximity detector’s signals while it’s in the rocket but is triggered to release the parachute when it approaches the ground

88Presenter: Lynn

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Integration and Test Overviews

• Design considerations

• Changes since PDR

• Preliminary integration plan

• Preliminary test plan

89Presenter: Annie

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Design Considerations

• Basic Design– Sturdy Structure– Land upright– Deploy Parachute

• Technical Systems– Components work together at the

proper times to get desired results

90Presenter: Annie

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


• No test launch• No computer simulations for

electric systems• Reevaluated individual tests

– GPS – Pressure Sensor

• Completed tests– Transceiver– Parachute

91Presenter: Annie

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Integration Basic Plan

• Obtain parts

• Unit Testing – test each component individually

• Subsystem Verification – connect parts and test within each subsystem

• System Validation – combine all the subsystems and test CanSat

92Presenter: Annie

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Unit Testing

• Antenna/Transceiver (done)• Parachute falling speed test (done)• Parachute Release• Sonar• GPS• Pressure Sensor• Buzzer• Serial Flash• Microcontroller

93Presenter: Annie

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Subsystems Testing

• Flight Software– Microcontroller and sensors

– Microcontroller to modem/parachute/data storage

• Power and Electrical– Battery to microcontroller, modem, etc

– Through voltage converter/transistors

• Structure– Outer shell and shelf inside

– Parachute

94Presenter: Annie

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

System Validation

• CanSat system– Circuit Board – Attach components to shelf and shell– Parachute

• Go/No Go Demonstration

95Presenter: Annie

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Integration Work to be Completed

• Test individual components– As parts arrive– Each with microcontroller

• Get working code to aid in testing– Send and receive data– Power commands

• Connect circuit board– Clean connections– Run power tests

96

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Annie

Integration Work to be Completed

• Build structure and integrate parts– Shelf– Structure soundness tests

• Go/No Go Demonstration (May)

97

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Annie


98

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

• Design Considerations and Requirements

• Changes Since PDR

• Ground System Block Diagram

• Ground Hardware Selection

• Ground Software Overview

• Plans for Testing

• Work to Be Completed

Presenter: Matt

Ground System Requirements

• No formal competition requirements• Make sure our antenna gives us

enough range to receive data transmissions from the CanSat– Raise antenna higher above ground

• Receive altitude data at least every 5 sec

• Be able to interpret the transmissions as “useful” altitude data

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 99


• Hardware list updated

• Will use Excel for data processing and analysis

• Will use PVC pipe to raise dipole antenna higher above ground

• Yagi antenna available for use

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 100

Ground System DiagramIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 101

AntennaModemComputerDevelopment

Board

CanSat

PowerSource

AnalysisSoftware

101

Radio Wave

WaveformTTLRS-232

Radio Wave

Information

Power

Ground System Hardware

• Modem • 20-pin mating connectors for

modem• AeroComm development

board• Dipole antenna• USB cable• Battery charger• Computer• PVC pipe• Multi-meter• Screwdriver• Screws• Soldering Iron• Solder

• Misc. cables and wires for power

• Wire cutters• Pliers• Pic starter kit• Banana cables• Alligator clips• Scissors• Fasteners• Surge protector• Duck tape• Glue• Comtelco

Y3387D915 Yagi*

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Ground System Software

• AeroComm modem configuration software

• Microcontroller configuration software

• Data analysis – Will use Excel to process raw data– Will plot an altitude-time graph with

Excel

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Plans for Testing: Ground System

• Repeat ranged testing with raised dipole antenna

• Determine R/F link quality with slightly different antenna polarizations

• Test Yagi antenna for FCC compliancy

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Ground System Work to be Completed

• Determine max amount of data AeroComm software can store in buffer before overflowing

• Determine optimal antenna height• Construct a case to house the modem

near the antenna– Will need to have wires run the length of the

PVC pipe to the development board at the bottom

• Test both dipole and Yagi antennas

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Mission Operations

106

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

• Concept of operations

• Data analysis

Presenter: Steve

Summary of PDR ChangesIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Steve 107

• We are leaving on the 11th of June instead of the 12th.

• We are only planning to have two people at this point

Concept of Operations: Competition Week

108

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Cost Estimates

Mission Operations

• We leave U of M the June 11th in the morning

• Drive all day until St. Louis and stay the night at Holiday Inn Select

• Drive all day on the 12th and arrive at the competition

• Stay the night at the Holiday Inn• Leave Competition on the 15th and drive

home, staying the night in the same hotel in St. Louis

• Drive all day on the 16th until we are homePresenter: Steve

Launch Day

109

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Cost Estimates

Arrive at Launch Site - 3 hour


CanSat Testing - 30 min

Assigned to Launch Window ~ - 15 min

Integration with Rocket ~ - 10 min

Blastoff!!! 0

CanSat Apogee ~ + 10 sec

CanSat Deploys ~ + 12 sec

Parachute Deploys ~ + 13 sec

Data Collection ~ - 10 min – + 9 min

CanSat Recovery ~120 min


Data Analysis After CanSat Recovery

Final Presentation Following Day

Mission Operations

Presenter: Steve

Launch Day Action Items

110

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Cost Estimates

Mission Operations

Presenter: Steve

Time Person A Person B

-3 hours Set up our table Set up computer systems

-30 minutes Hook up hardware and set up the ground antennas

Power up CanSat and run final tests

~0 minutes Begin gathering data from the CanSat

Begin gathering data from the CanSat

+10 minutes Analyze the GPS data to find landing site of CanSat

Make sure collected data is saved & secure

+15 minutes Clean up the table Begin searching for CanSat

+2 hours Return CanSat to storage and pick-up what’s left

Retrieve and save the onboard data

Contingencies

• I expect to have two people total• If any components break, we will attempt

to fix them using the ground station tools (soldering iron, multimeter) or go on without them

• The following components must not break

- Transceiver (ground’s or CanSat’s)

- Microcontroller

111

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Cost Estimates

Mission Operations

Presenter: Steve

Data Analysis

112

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Cost Estimates

Mission Operations


•Plot the altitude with respect to time

•Using Excel, create a series of best fit curves in order to model the mission

• GPS Latitude and Longitude data could be graphed with respect to position and time in order to make a 3D model using Mat-Lab

Cost Estimates

113

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

• Preliminary component cost estimates

• Ground station cost estimate

• Services cost estimate

Presenter: Steve

Summary of PDR ChangesIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


• We needed more components than we

• Every component has been purchased

• We ordered a few extra components just in case things should break

Cost-Budget of the CanSatIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Component Quantity Cost per Unit

Subtotal Cost

Contingency (%)

Net Cost

Microcontroller Socket 1 $1.68 $1.68 0 $1.68

Microcontroller 1 $0.00 $0.00 0 $0.00

Serial Flash Memory 1 $3.00 $3.00 0 $3.00

Proximity Detector 1 $29.95 $29.95 0 $29.95

Pressure Sensor 1 $40.00 $40.00 0 $40.00

GPS 1 $0.00 $0.00 0 $0.00

Circuit Board 1 $45.00 $45.00 10 $49.50

Battery 1 $14.99 $14.99 0 $14.99

Voltage Regulator 1 $2.32 $2.32 0 $2.32

Buck Converter 1 $2.55 $2.55 0 $2.55

Boost Converter 1 $3.77 $3.77 0 $3.77

Servo 1 $0.00 $0.00 0 $0.00

Parachute Release Rod and Connectors

1 $5.00 $5.00 10 $5.50

Antenna 1 $0.00 $0.00 0 $0.00

Transceiver 1 $0.00 $0.00 0 $0.00

Transceiver Socket 1 $4.00 $4.00 0 $4.00

Cost-Budget of the CanSatIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Component Quantity Cost per Unit

Subtotal Cost

Contingency (%)

Net Cost

Structure Exterior (Carbon 2.5 Heavy)

1 $16.50 $16.50 0 $16.50

Shelf and End-Caps 1 $33.95 $33.95 0 $33.95

L Bracket 2 $0.50 $1.00 10 $1.10

U Bolts 2 $2.95 $5.90 10 $6.49

Screws 15 $0.50 $7.50 10 $8.25

Streamer 1 $3.00 $3.00 10 $3.30

Parachute 1 $0.00 $0.00 15 $0.00

Relay 1 $2.95 $2.95 0 $2.95

Inductor 2 $0.00 $0.00 0 $0.00

Capacitor 4 $0.00 $0.00 0 $0.00

Resistor 2 $0.00 $0.00 0 $0.00

Buzzer 1 $3.23 3.23 0 $3.23

System Reserve - - - $100.36

Subtotals - - $222.29 -

Total with Contingency - - - - $329.39

Margin - - - - $170.61

117

Ground System Costs

Presenter: Steve

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

117

$329.39 For Cansat

$30.00 For Ground Station

$359.39 Total

Components Price

Modem (AC4790 200M) Free

20-pin Mating Connector for Modem Free

AeroComm Development Kit Free

Antenna (Nearson S467FL-L-RMM-915) Free

Battery Charger $22.95

Computer Free

Modem Configuration Software Free

Microcontroller Configuration Software Free

Data Analysis Software Free

PVC Pipe Free

Misc. cables/wires (for powering modem and driver) Free

Ground Station Reserve 7.05

Total $30.00

Schedule Overview

• Major milestones

• Tasks to come

118

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Steve

Project Schedule

119

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Steve

Plans to Build• Work with the carbon fiber and fabricate the structural

components

• Interface the transceiver, modem, GPS, power, and structure

• Fabricate the circuit board

• Calibrate pressure sensor and proximity detector then build their cycles into the microcontroller program

• Integrate the data acquisition subsystem into the system

• Interface with the motor using the microcontroller

– Completely build the parachute release mechanism

– Program the microcontroller to move the motor when ~1m from ground

• TEST

120

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Steve

Major Milestones

• Trade Studies (Nov. 22nd)• MDR presentation to EXCOM (Oct. 17th) • PDR presentation to AAS (Feb. 14th)• CDR presentation to EXCOM (Feb. 20th)• CDR presentation to AAS (April 24th)• CanSat Fabrication Complete (May 20th)• Go/No Go demonstration (May 23rd)• Competition (June 13th – 15th)

121

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Successfully completed

Pending

Presenter: Steve

Tasks to Come

• Code the microcontroller so that every component works

• Finish telemetry work in the laboratory

• Buy the circuit board

• Fabricate the structure, end caps, and shelf

122

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Steve

123

Thank You Very Much

• Thank you to EXCOM for organizing and maintaining this program

• Thank you to the American Astronautical Society, American Institute of Aeronautics and Astronautics, and NASA for orchestrating this competition

• Thank you to all those who came before us

• Thank you to my team which works very hard on this project

Presenter: Steve

124

Questions and Comments

• System related?

• Subsystem related?

• Critiques?

• Apparent issues?

• Comments?

Presenter: Steve

Backup Slides

125

126

Sensors

• Purpose – To obtain outside data and transmit that data to the command and data subsystem for processing. Specifically, altitude data must be transmitted at least every 5 seconds.

Presenter: Mike

127

Power and Electrical Subsystem

Purpose:

To provide the cansat with enough power to run all of its components

Presenter: Devin

128

Command and Data

To record, store, and transmit measurements from other devices in an organized manner.

Purpose

Presenter: Lynn

129

Structures

• Maintain the constant shape of the cansat. • Support the necessary measuring instrumentation during the flight.• Effectively design landing gear that will result in the cansat coming to rest in an upright position.

Purpose

Presenter: Jake

Telemetry

• Purpose: Transfer collected data every 5 seconds from the cansat to the ground station, as required in competition guidelines.


Programming LanguageIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Lynn 131

• We chose to use C to program our Microcontroller

• Simple• All-purpose• Widely Employed• Many tutorials available and easily accessibleBackup?

PICkit 2 Starter Kit

• Low cost, easy to use interface for programming microcontroller

• Comes with Microchip’s MPLAB IDE software that programs, assembles, compiles using C

Microcontroller SoftwareIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Lynn 132

Backup?

133

Team Requirement

• The cansat team will consist of no more than ten students, two of which being graduate students.

134

Phase A

• Began after the all hands meeting and progressed until today.

• Identified the purpose, objectives, problems, and goals of our project.

• Identified methods and tactics that will be employed to overcome the engineering problems.

• The gateway into Phase B will be the approval of this MDR presentation.

• This presentation covers everything accomplished in Phase A.

135

Phase B

• The preliminary design phase.• The components of the cansat will be

chosen.• Solutions to each engineering problem will

be implemented.• The cansat’s design will become more

specific to its objectives.• The end of Phase B will be marked with

the PDR presentation.

136

Phase C

• The critical design phase.

• The cansat will be thoroughly designed.

• All technical solutions will be implemented.

• CAD blueprints will be finalized.

• The cansat will be ready to be fabricated upon the completion of this phase.

• The phase will end upon the approval of the CDR presentation.

137

Phase D

• The cansat is fabricated.• Each subsystem will undergo rigorous testing

during the fabrication process to ensure reliability.

• After building and testing, re-evaluation of the objectives will be held in order to ensure that it accomplishes its mission.

• Phase D will conclude with a Go / No Go demonstration.

• When given the go, the cansat will fly and win!

138

CanSat Requirements

•The cansat including parachute and any drag device shall fit inside the payload section.

•The cansat will fit inside of a cylindrical payload envelope of 72.39mm diameter and 279mm in length without protrusions.

•The cansat will be deployed from the payload section.

•The cansat will have a mass of no more than 500 grams.

•The cansat decent time will not exceed seven minutes nor will it fall with a velocity of more than 4.6 meters per second.

•The cansat will cost no more than $500.

Accessories

• Universal Smart Charger for Li-Ion/Polymer battery Pack (3.7V - 14.8V, 1-4 cells)

Cost $22.95

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Devin 139

140

Voltage Converter Trade Study

Model Manufacturer WebsiteInput

VoltageOutput Voltage

Output Current

Weight g

Size mm Price $

LANE3.312N

Wall Industries, Inc www.wallindustries.com2.97-3.63

12 84mANot

Listed 19.5X6X1

013.65

RL-3.315SRECOM Power

Inc.www.recom-power.com 3.3 15 17mA 1.8 Not listed Sample Inquiry


Inc.www.recom-power.com 1.8 9 139mA 1.8 Not listed Sample Inquiry

Presenter: Devin

http://www.wallindustries.com/

http://www.recom-power.com/

http://www.recom-power.com/

Step Up Converter

LM32113.7V to 5V5V to 10V


Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Battery Type

Manufacturer Model # Cost ($) Mass (g) Dimensions (mm)

Voltage (V) Max. Capacity (mAH)

Rechargeable

Lithium Ion-Polymer

Total Power Solutions 5E+05 7.19 25.0 66X35X5 3.7 1300 Yes

Nickel-Cadmium

Total Power Solutions one AA 1.02 22.68 12.2diameterX

50 1.2 950 No

Alkaline Energizer E92 AA5.68

for eight

23 14.5diameterX50.5 1.5 2850 No

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Rechargeable vs Non-Rechargeable Battery Comparison


Rechargeable vs. Non- Rechargeable

143

RECHARGEABLE NON-RECHARGEABLE

Reusability Longer Life Cycles

Faster Discharge Rates Good Only Once

Final Cost is Less Each Battery Costs Less

Our choice is

Rechargeable

Presenter: Devin

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

144

The Maize-Sat Road to Victory• Team Maize-Sat held their first meeting on the

28th of September.• Phase-A shall be completed by the 21st of

October.• Phase-B proceeds until November 21st and will

conclude with the preliminary design review (PDR).

• Phase-C begins after PDR and will finalize with the presentation of the critical design review (CDR) in February.

• Phase-D begins after CDR and will conclude June 13th when team Maize-Sat procures victory at the 2008 National CanSat Competition.

Presenter: Steve

Structures Purpose• Maintain the constant shape of the

CanSat

• Support necessary measuring instrumentation during the flight

• Achieve desired descent rate and locate CanSat using effective recovery system

• Land CanSat in predefined upright position

• Comply with competition requirements

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 145

Material Trade Study

MaterialDensity (g/cc)

Tensile Strength (GPa)

Cost

Carbon Fiber 1.75 3.5 $651.00/m^2*

Fiberglass 2.1 1.08 $21.53/m^2

Aluminum 2.7 Varies $59.74/m^2

Steel 7.9 1.3 $52.31/m^2

Desired Properties•Strong

•Lightweight

•Inexpensive

•Easy to shape

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 146

*custom 180 mm x 305 mm sheet = $40.28

http://images.google.com/imgres?imgurl=http://www.cruisermotorsports.com/(CF)Real%20Black%20Carbon%20Fiber.gif&imgrefurl=http://www.cruisermotorsports.com/DashKits.html&h=320&w=400&sz=105&hl=en&start=1&um=1&tbnid=cyiYeIcQlr77_M:&tbnh=99&tbnw=124&prev=/images%3Fq%3Dcarbon%2Bfiber%26svnum%3D10%26um%3D1%26hl%3Den%26sa%3DN

Streamer Trade Study

Model Dimensions Color Cost

ASP sport 7.62 cm x 121.92 cm bright yellow $2.49

ASP Silver Dura-Lar 12.7 cm x 127.0 cm mirrored silver $2.95



Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 147

Desired Properties• Highly visible• Inexpensive

http://www.asp-rocketry.com/store/category.cfm?Category=218

Buzzer Trade Study

Piezo Buzzer (AI-3245-TF-

LW95-R)

AI-400 KPEG 272A KPEG 208H (pin)

29PN3120 Piezo

Operating Voltage 3-28 Vdc 3-28 Vdc 3-20 Vdc 8-18 Vdc 3-28 Vdc

Current Consumption 5mA 10mA 10mA 13mA 9mA

Sound Pressure Level 90 dB (10 cm) 99 dB (10 cm) 95 dB (30 cm) 91 dB (30 cm)

90 dB (30 cm)

Diameter 22.0 mm 42.0mm 31.5 mm 24.0 mm 41.8 mm

Height 10.8 mm 14.0 mm 14.4 mm 17.5 mm 16 mm

Weight 5 g 12 g 7 g 1.2 g 15 g

Price $3.41 $2.96 $3.59 $3.35 $4.50

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 148

Decibel comparisonTrain whistle at 500’, Truck Traffic - 90dB

KPEG 208HFrequency: 3500 +/- 500 HzTone: continuous

Parachute Trade StudyIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 149

Desired Properties• X-form (between 939.8 mm and 2387.6 mm diameter) – helps with drift• Circular (between 762 mm and 1930.4 mm diameter)• Spill hole (helps with stability)• Lightweight • Strong (able to withstand opening shock)

Make Spherachutes SpherachutesTop Flight Recovery

Top Flight Recovery (x-form)

Aerocon (x-form)

Model 48" Spherachute 36" Spherachute Standard PAR-45 UXTPAR-48 73" Ballistic

Spillhole Yes Yes No No No

Shroud lines 8 6 8 8 12

Diameter 1219.2 mm 914.4 mm 1143.0 mm 1219.2 mm 1854.2 mm

Weight 85.0 g 51.0 g ~70.0 g ~70.0 g ~100.0 gPacked Volume (mm)

88.9 x 88.9 x 50.8

76.2 x 76.2 x 38.1 N/A N/A N/A

Cost $34.00 $21.00 $19.95 $23.95 $25.00

Material1.9 oz Rip-stop

nylon1.9 oz Rip-stop



nylonRip-stop

nylon

http://www.sierrafoxhobbies.com/prods/dett.php?id=385&selMacro=81&selCat=149&selsCat=

Descent Rate

• Requirement: ~1.8 m/s < rate < 4.6 m/s– (7 minute maximum descent time)

• 1.42 m diameter x-form parachute: ~3.5 m/s*– (~3.6 minute descent from 760 m altitude)

Desired Parachute Properties• X-form (between 939.8 mm and 2387.6 mm diameter) – helps with drift• Circular (between 762 mm and 1930.4 mm diameter)• Spill hole (helps with stability)• Lightweight • Strong (able to withstand opening shock)

*based on projected 470 g CanSat

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 150

Servo (Motor) Trade StudyIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 151

Model ManufacturerDimensions

(mm)Mass

Torque(g-f mm)

Voltage Price

S185 Super High

Speed

Horizon Hobbey/JR

11.2 x 19.8 x 20.3

6g8713 or

94334.8V or 6V $17.99

Z270 Standard Race

Horizon Hobbey/JR

18.5 x 39.4 x 37.1

42g30963 or

352834.8V or 6V $17.99

331 Micro

Horizon Hobbey/JR

12.7 x 28.4 x 29.7

18g 30243 4.8V $27.99

S241 Sub-

Mirco

Horizon Hobbey/JR

11.4 x 22.1 x 21.6

9g 12241 4.8V $27.99

537 Standard

motor

Horizon Hobbey/JR

18.5 x 29.2 x 33.5

45g28803 or

352834.8V or 6V $26.99

Z550 Premium

Race

Horizon Hobbey/JR

18.5 x 29.2 x 33.5

42g36723 or

446444.8V or 6V $34.99

Chosen Material

• Carbon fiber used as frame material– Least dense – Highest tensile strength– Self-manufactured

• Custom shape• Less expensive

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Jake 152

http://images.google.com/imgres?imgurl=http://www.cruisermotorsports.com/(CF)Real%20Black%20Carbon%20Fiber.gif&imgrefurl=http://www.cruisermotorsports.com/DashKits.html&h=320&w=400&sz=105&hl=en&start=1&um=1&tbnid=cyiYeIcQlr77_M:&tbnh=99&tbnw=124&prev=/images%3Fq%3Dcarbon%2Bfiber%26svnum%3D10%26um%3D1%26hl%3Den%26sa%3DN

Circuit Board Possibilities

Manufacture Our Own

Buy One

Pros• We could make many different boards• We could run more tests

Cons• Materials would cost more because of chemicals• It would take a lot of time and energy• They would be lower quality

Pros• Higher quality• Cheaper because they are mass produced

Cons• We could only work with a couple of boards

Our choice is to buy a quality circuit board.

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Serial Flash Trade Study

Name Maker Cost Storage Space Voltage (V) Current

(mA) Packaging Dimensions (mm) Mass (g)

M25PE40 STMicroelectronics pending 512 KB 2.7-3.6 15 S08W 6.00 X 5.00 X 0.85 pending

M45PE40 STMicroelectronics pending 512 KB 2.7-3.6 15 S08N 6.20 X 5.00 X 1.75 pending

M45PE80 STMicroelectronics $3.12 1 MB 2.7-3.6 15 S08N 6.05 X 6.22 X 2.5 pending

AT25F4096 ATMEL pending 512 KB 2.7-3.6 5 EIAJ SOIC & SAP

5.35 X 8.26 X 2.16 pending

Pm25LV512A/040 Pflash pending 512 KB 2.7-3.6 15 SOIC & WSON 4.00 X 5.00 X

1.75 pending

SST25VF040B STT $1.45 512 KB 2.7-3.6 15 SOIC & WSON 8.10 X 5.40 X

2.16 pending

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

155

Voltage Converter Trade Study

Model Manufacturer Efficiency %Input

VoltageOutput Voltage

Output Current

Mass(g)Size (mm)

Price $

LANE3.312NWall Industries,

Inc70 2.97-3.63 12 84mA

Not Listed

19.5X6X10

13.65

LM2757National

Semiconductors80 2.7-5.5 4.1-5 180mA

Not Listed

1.2X1.6X.4

1.50

LM3211National

Semiconductors90 2.2-7.5 Vin-17 150mA

Not Listed

Not Listed

1.67


Inc.70 3.3 15 17mA 1.8

Not listed

Sample Inquiry


Inc.70 1.8 9 139mA 1.8

Not listed

Sample Inquiry

Presenter: Devin

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Circuit Board Manufacturers

Company Size mm Price $

Expresspcb custom 2 for 63

Pcb123 50.8X76.2 44.00

Sunstone Circuits 76.2X127 2 for 90

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


Battery Type Manufacturer Model # Cost $ Mass (g) Dimensions (mm) Voltage (V) Max. Capacity (mAH)

Lithium Ion-Polymer

Total Power Solutions 503566 7.19 25.0 66X35X5 3.7 1300

Lithium Ion Ultralife UBP001 12.2 41 54X36X11 3.7 1800

Lithium Ion-Polymer

Union Battery PRT-00341 7.95 18.5 47.5X29X5.84 3.7 860

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Rechargeable Battery Comparison Final


158

GPS Trade Study

Manufacturer Model Dimensions Price Accuracy MassAcquisition

TimeCommunication

ProtocolPower Voltage

Global Sat EM-40630 mm x 30

mm x 10 mm$55 Within 2m

22 grams

1s (Hot)

42s (Cold)TTL 70 mA

4.5V-6.5V

DC Input

GarminOEM GPS

15H-W

30 mm x 30 mm x 5 mm

$54.95 Within 3m15

grams15s (Hot)

45s (Cold)TTL 85 mA

8V-40V

DC Input

Brick House Security

Super Pocket Track

114 mm x 31.75 mm x 19.05 mm

$59 Within 22m40

grams

Not compatible with current

design

Digital Battery Battery

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike

159

Pressure Sensor Trade Study Manufacturer Model Dimensions Price Accuracy Mass

Acquisition Time

Power VoltageCommunication

Protocol

OmegaPX71

030AV

9.14 mm x 5.84 mm x 19.81 mm

$40 0.25% BFSL 35 grams 10ms 65 mA85

DC InputAnalogue

OmegaPX302015AV

28.6 mm x 81.7 mm x 28.6 mm

$235 0.25% BFSL 131 grams 10ms 97 mA10V

DC InputAnalogue

Vaisala PMB10025.5 mm x 50.5 mm x 25.5 mm

$799±0.3 hPa at

room temperature

70 grams 200ms 75 mA7V

DC InputTTL

Vaisala PTB210120 mm x 32 mm x 50 mm

$960 ± 0.25 hPa 110 grams 500ms 55 mA6V

DC InputTTL

Vaisala PTB1101.11 mm x 3.83 mm x 0.62 mm

$1099±0.3 hPa at

+20 °C90 grams 500ms 115 mA

7VDC Input

TTL

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike

Data RedundancyIntroduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 160

Time (s) 0 2 4 6

Data t D0 D0, D2 D2, D4 D4, D6

160

Modem Trade StudyModel MaxStrea

m

9X-Stream

MaxStream

Xtend

AeroComm

AC4490 200M

AeroComm

AC4490 LR 200M

AeroCommAC4490 1000M

Integration

IA4420

Tx Power Consumption

150 mA 730 mA 68 mA 68 mA 650 mA 24 to 26 mA

Supply Voltage

5 V +/-0.25 V

2.8 to 5.5 V +/-50 mV

3.3 or 5.5 V +/-50 mV

3.3 or 5.5 V +/-50 mV

3.3 V

+/-50 mV

2.2 to 5.4 V

Mass 24 g 18 g < 21g <21 g < 21 g < 10 g

Dimensions 40.6 x 71.7 x 8.9

mm

36.5 x 60.5 x 5.1 mm

49 x 42 x 5 mm

49 x 42 x 5 mm

49 x 42 x 5 mm

6.4 x 5.0 x 1.2 mm

Max Range 32 km 64 km 6.4 km 12.9 km 64.4 km 3.5 km

Serial Interface

UART: 5V CMOS

UART: 3 or 5V CMOS

UART: 3.3 or 5V TTL

UART: 3.3 or 5V TTL

UART: 3.3V TTL

SPI

Rx Sensitivity Up to -110 dBm

Up to -110 dBm

Up to -100 dBm

Up to -110 dBm

Up to -110 dBm

Up to -109 dBm

Operating Temperature

-40 to 85°C

-40 to 85°C -40 to 80°C

-40 to 80°C -40 to 80°C

-40 to 85°C

Cost $112.50 $134.25 $62.50 $68.50 $77.50 $20.00

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 161

Antenna Trade StudyModel Type Length Gain Connector Mass VSWR Cost

Nearson S467FL-L-RMM-915

1/2 wave 182.9 mm

2 dBi MMCX TDB < 2.0 : 1 $16.00

Nearson S467XX-915

1/2 wave 211 mm 2 dBi SMA, TNC, BNC

TDB < 2.0 : 1 $16.00

Nearson S161AM-915

1/2 wave 160 mm 2.5 dBi SMA TDB < 2.0 : 1 $10.00

Nearson S331AM-915

1/4 wave 88 mm 1 dBi SMA TDB < 2.0 : 1 $15.00

Antenna Factor ANT-DB1-RMS

1/4 wave 77.8 mm

3 dBi SMA, TNC TDB < 1.5 : 1 $19.50

Nearson SG101N-915

Omni 405 mm 5 dBi N TDB < 2.0 : 1 $52.00

Comtelco Y2283A-915

Yagi 381 mm 6 dBd Pigtail N, TNC

< 0.907 kg < 2.0 : 1 $69.30

CushCraft PC8910N

Yagi 1052 mm

11 dBd N 1.04 kg TDB $112.00

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Presenter: Matt 162

Microcontroller Trade StudyName Type Speed Memory

SpaceRAM Pin

CountEEPROMMemorySpace

Price

MicrochipPIC18F4685

Flash 40MHz 96KBytes 3328 40 1024Bytes $6.19

MicrochipPIC16C926

OTP 20MHz 14KBytes 336 64 0 $3.62

MicrochipPIC18F2431


MicrochipPIC18F2455


Atmel324P

Flash 20MHz 32KBytes 2048 32 1024Bytes nil

Presenter: Lynn 163

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Team Maize-Sat

• Undergraduates in the University of Michigan College of Engineering

• Working as members of the Student Space Systems Fabrication Laboratory (S3FL)

• Under the advising of Ricky Redick from EXCOM and Professor Ella Atkins

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


165

Sensory Subsystem

• CanSat Competition Requirements• Maize-Sat Internal Requirements• Primary method• Redundant method• Trade studies• Contingencies

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike

Proximity Detector Beam at 10 ft

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike 166

The beam does not need to be pointed directly at the ground, it will still detect the ground even if it is aimed ~20 degrees off

Backup?

Contingencies Involved

• Sensors are small and fragile

• The GPS might fail

• Pressure sensor is the backup

• Both units are at the mercy of the various stresses of the launch, the weather, and the landing

• Altitude data may not be as accurate as anticipated

Introduction

Schedule Overview

CanSat Overview





Mission Operations

Cost Estimates

Electrical Overview

Presenter: Mike 167

System Risk Assessments

• MMCX connector– It can break easily– Exercise caution and it should be fine

• Linking Issues– Previous teams had problems linking

AeroComm modems– Run thorough tests to avoid this

problem

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates


169

Team Purpose

• To win the 2007-2008 CanSat competition

• To execute the NASA project lifecycle: design, build, test, and fly

• To gain practical hands on experience in engineering and teamwork skills

Presenter: SteveSchedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Introduction

170

Travel Costs

Presenter: Steve

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Mission Operations

Cost Estimates

Van ~$185.00

Gas ~$335.00

Lodging ~$320.00

Food ~$100.00

Total ~$940.00

Assumptions• A U of M van at $37 per day• 25 MpG for 2530.3 mile round trip• 103 gallons of gas consumed• $3.25 per gallon of gas• 5 days, 4 nights• $80.00 per night of lodging• 2 provided meals and bringing lots of our own food

171

Pressure-Altitude Calculations

=1.4 for standard daytime conditions

ps = surface pressure (from pressure sensor)

p(z) = pressure as a function of altitude (from pressure sensor)

ρs= calculate on day of competition utilizing online program

z = determined altitude

g

pz

s

s

*

281.9s

mg

Introduction

Schedule Overview

CanSat Overview


Electrical Overview




Cost Estimates

Mission Operations

Presenter: Steve

Cansat 2008: University of Michigan Maizesat Final Presentation

Technology

Transcript of Cansat 2008: University of Michigan Maizesat Final Presentation