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?