ATA’s Nanoradian-Class Rotational Sensors 10 November 2009.

ATA’s Nanoradian-ClassATA’s Nanoradian-ClassRotational SensorsRotational Sensors

10 November 2009

Use or disclosure of this sheet is subject to the restriction on the title page of this document.

ATA OverviewATA Overview

• Awards and Distinctions– 2008 Minority Manufacturer of the Year

– 2004 SBA National Prime Contractor of the Year

– 2005 NM Innovator of the Year

– USAF Small Business R&D Awards

– SBA Administrator’s Award

– Multiple Patented Technologies

• Operating Sites in New Mexico– ATA 1300 Britt Street, Albuquerque, NM

Headquarters– Kirtland AFB – AFRL and Big Crow

Support Sites– North Oscura Peak, WSMR AFRL Laser

Test Facility– Las Cruces, NM WSMR Support Site

• Founded 1975 A-TECH Corporation, d.b.a. Applied Technology Associates

• Customers Include USAF, Sandia NL, US Army, MDA, NASA, US Navy, and Aerospace and Defense Companies

• Approximately 250 Employees

ATA is an Established Technology Company with a Proven Track RecordATA is an Established Technology Company with a Proven Track Record

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• ISO-9001 Certified• Class 10,000 Clean Room• Approved Vendor

– Ball Aerospace– Lockheed Martin– Boeing– Raytheon

• Produced Space Qualified Hardware– Lockheed Martin– Boeing– Raytheon– Sandia National Laboratories

ATA Overview Cont’dATA Overview Cont’d

Raytheon

3

Use or disclosure of this sheet is subject to the restriction on the title page of this document. 4

• ATA has a history of inventing sensors in response to customer requests or internally identified needs

Overview Overview


MHD ARS Sensing Concept

• The MHD concept resulted from an Air Force request for alternate angular sensing techniques

AngularVelocity(rad/ s)

SensitiveAxis

ElectricField

RelativeVelocity

ElectrodeAreas

ConductingFluid

MagneticFlux

Density

PermanentMagnet

VoltageOutput

Proportionalto Angular

Rate

B

E

SN

w

+

-

Uq

MHD SensorMHD Sensor

High PerformanceHigh Bandwidth: > 1,000 HzLow Noise Floor: <100 nrad NEA (1-1kHz)High Dynamic Range: > 100 dBLow Cross-Axis Sensitivity

Simple DesignSmall Size: 1.0 x 1.0 x 1.3”Low Weight: 100 gramsLow Power: < 0.3 WattsRugged Design: > 1,000 g


Augmenting Sensors with Augmenting Sensors with Other TechnologiesOther Technologies

• Radiation-tolerant design (100Krad environment)

• ATA designed and implemented FPGA processing architecture, collaborated in board design

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Microradian-Class Testing Microradian-Class Testing

• ATA has developed test facilities and techniques suitable for a range of motion profiles


ARS Specifications

Model ARS-06 ARS-15 ARS-14 ARS-24

Range +200 rad/s +10 rad/s +0.5 rad/s +0.005 rad/s

Scale Factor 50mv/rad/s 1 V/rad/s 20 V/rad/s 2120 V/rad/s

-3dB Bandwidth 0.4 - 1kHz 4 – 1kHz 1 – 1 kHz 1 – 675 Hz

Rate Noise, 1-1kHz 4.7 mrad/s 27 μrad/s 5 μrad/s 1 μrad/s

Displ. Noise, 1-1kHz 50 μrad 0.8 μrad 50 nrad 8 nrad

Dimensions (inches) 0.7 x 1 0.8 x 0.8 x 1.2 1 x 1.3 x 2.9 2 x 2 x 4

Mass (grams) 35 60 200 2000


Frequency Response Magnitude

ATA MHD ARS Frequency Response Magnitude(FR Magnitude quoted at 10 Hz)

-50.00

-40.00

-30.00

-20.00

-10.00

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

0.1 1.0 10.0 100.0 1000.0

Frequency (Hz)

FR

Mag

(d

B r

ef 1

V/r

ad

/s)

ARS-06 (0.05 V/rad/s)

ARS-15 (1 V/rad/s)

ARS-14 (20 V/rad/s)

ARS-24 (2120 V/rad/s)


Frequency Response Phase

ATA MHD ARS Frequency Response Phase

-180.00

-90.00

0.00

90.00

180.00

0.1 1.0 10.0 100.0 1000.0

Frequency (Hz)

Ph

ase

(deg

rees

)


Rate Noise

ATA MHD ARS Rate Noise(Noise quoted from 1-1000 Hz)

1.0E-16

1.0E-15

1.0E-14

1.0E-13

1.0E-12

1.0E-11

1.0E-10

1.0E-09

1.0E-08

1.0E-07

1.0E-06

0.1 1.0 10.0 100.0 1000.0

Frequency (Hz)

(Rad

/s)2

/Hz

ARS-06 (4.67 mrad/s RMS)

ATA MHD ARS Displacement Noise(Noise quoted from 1-1000 Hz)

1.0E-24

1.0E-23

1.0E-22

1.0E-21

1.0E-20

1.0E-19

1.0E-18

1.0E-17

1.0E-16

1.0E-15

1.0E-14

1.0E-13

1.0E-12

1.0E-11

1.0E-10

1.0E-09

1.0E-08

1.0E-07

1.0E-06

0.1 1.0 10.0 100.0 1000.0

Frequency (Hz)

(Rad

)2/H

z

ARS-15 (26.6 μrad/s RMS)




Displacement Noise

ATA MHD ARS Displacement Noise(Noise quoted from 1-1000 Hz)

1.0E-24

1.0E-23

1.0E-22

1.0E-21

1.0E-20

1.0E-19

1.0E-18

1.0E-17

1.0E-16

1.0E-15

1.0E-14

1.0E-13

1.0E-12

1.0E-11

1.0E-10

1.0E-09

1.0E-08

1.0E-07

1.0E-06

0.1 1.0 10.0 100.0 1000.0

Frequency (Hz)

(Rad

)2/H

z

ARS-06 (50 μrad RMS)

ARS-15 (0.8 μrad RMS)

ARS-14 (40 nrad RMS)

ARS-24 (5 nrad RMS)


• These radiation hardened DC accelerometer units can measure microradian-level tilts in the presence of strong background acceleration (0.25g rms +).

0.1 0.1 μμG AccelerometerG Accelerometer

Dennis


Seismically Stable Platform Tilt Sensor (1990)

Noise-174 dB rad

Corner6.9 mHz


Northfinder

• Current effort underway to develop a 1 mrad Northfinder

• Based on modulating earth rate onto the ARS-14 by rotating a horizontal sensor in the earth’s rotation field

ATA’s Nanoradian-Class Rotational Sensors 10 November 2009.

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