Mars Rover Presentation
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Transcript of Mars Rover Presentation
DESIGN OF A MOBILITY SYSTEM FOR A MARS ROVER
MANDEEP PHULL
Presentation Content
EGM082: Individual Project2
Introduction Aims for the Mars Rover project Why?
Types of Mars Rovers Wheeled Tracked ELMS
Design of ELMS Design of Bracket Future of Mars Rover
Introduction
EGM082: Individual Project3
Aims of the Mars Rover Project Design suitable mobility system Design bracket to house motors Testing of the Mars Rover
Why Interest – MER (Mars Exploration Rover) Distinguish life on Mars Suitable environment History of Water Hostile Terrain Mobility system is key
Types Of Mars Rovers Wheeled Tracked ELMS
Types of Mars Rovers
EGM082: Individual Project4
Wheeled Favoured system by
NASA Rocker-bogie
suspension Spring-less suspension
system Chassis comprises of
main rocker arm and secondary arm
Wheels joined by ‘bogies’ Uses Ackermann
steering Equal distribution of
traction on each wheel
Ref: http://en.wikipedia.org/wiki/Rocker-
bogie
Types of Mars Rovers
EGM082: Individual Project5
Tracked Promising concept –
better traction Offer low vehicle sink-
age Better pull Quite inefficient Uses Skid steering Obstacle negotiation
easier System vulnerable to
dust/debris
Ref: http://www.dlr.de/rm/en/desktopdefault.
aspx/tabid-3815/6074_read-8857/
Types of Mars Rovers
EGM082: Individual Project6
ELMS Developed by Lockheed
Missiles and Space Company
Elastic track is fundamental component Continuous elastic strip
made of high strength material
Loop mechanism offers 2 advantages Two 180 degree bends
provide spring suspension Lower section is stiffened,
removes the need for additional support
Fewer contact time between loop and drive wheel
Ref:W. Trautwein, Design, Fabrication and delivery of an improved single elastic loop mobility system (ELMS), Volume II, Technical
Report, NASA
Design of the ELMS
7 EGM082: Individual Project
All dimensions in mm
Design of the Bracket
8 EGM082: Individual Project
All dimensions in mm
Future of Mars Rovers
EGM082: Individual Project9
Mars rovers are continually improving since the 1980’s Self navigation Solar panels used to retrieve its
power sources Spirit and Opportunity
Twin rovers Rocker-bogie suspension Scientific instruments
Pancam Navcam Magnets, amongst others!
Materials Aeroshell – Aluminium honeycomb
structure between graphite epoxy sheets
ELMS very attractive alternative Better terrain negotiation Benefits from tracked system
advantages Low power consumption
Ref: http://martianchronicles.wordpress.com/
2009/01/13/5-years-on-mars/
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Any Questions?