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Drexel University RockSat 1
Drexel University2010-2011 RockSat-CFinal Presentation
Eric MarzJoe MozloomSwati MainiLinda MclaughlinSwapnil MengawadeAdvisor: Jin Kang, PhD
June 22, 2011
Drexel University RockSat 2
Team Overview
Linda McLaughlin, Eric Marz, Joe Mozloom, Swati MainiNot Pictured: Swapnil Mengawade, Dr. Jin Kang
Drexel University RockSat 3
Team Overview
Advisor: Dr. Jin Kang
MEM Department, Drexel University
Team Leader : Joe Mozloom
Senior, Mechanical Engineering
Subsystem Head: Despun Platform
Team MembersName Eric Marz Linda McLaughlin Swati Maini Swapnil Mengawade
Year and Major
Senior, Electrical and Computer Engineering
Senior, Electrical and Computer Engineering
Junior, Mechanical Engineering
Senior, Mechanical Engineering
Subsystem Head
Micro-controller, DAC, Storage
Sensors and Power Systems
Motor System and Organization
Modeling, System level requirements and Compliance to User Guide
Drexel University RockSat 4
Mission Objective
Implement a platform rotating opposite the spin-stabilization of the Terrier-Orion sounding rocket during ascent, resulting in a rotationally static platform from an outside reference frame.
Drexel University RockSat 5
System Block Diagram
Power Supply
CanisterAccelerometer Microcontroller
DespunAccelerometer Slip Ring
Digital to AnalogConverter
MotorGear/Pinion
Drexel University RockSat 6
Subsystem Overview
Structural Systems(SS)
Slip Ring Slip Ring Mount Motor Mount Platforms
Motor Systems(MS)
DC Micro-motor Gear Pinion
Data Systems(DS)
Microcontroller Accelerometers DAC Algorithms
Power Systems(PS)
BatteriesG-Switch
Drexel University RockSat 7
Payload Overview
SolidWorks Model of Payload
Drexel University RockSat 8
Payload Design
Final Payload Before Integration
Drexel University RockSat 9
Payload Design
Final Payload Before Integration
Drexel University RockSat 10
Integration
Sharing Canister with Temple SVSS Canister Integrated
Drexel University RockSat 11
Expected Results
Workbench FlightConform to all NASA/WFF requirements as outlined in User Guide
Conform to all NASA/WFF requirements as outlined in User Guide
Counter-rotating platform effective over outer canister spin frequency range from 0.5 Hz - 10 Hz
Counter-rotating platform engaged when canister is spinning
Maximum platform spin-rate 10% of current canister spin-rate
Platform able to rotate under harsh flight conditions
Data stored in memory and accessible post test
Data stored in memory and accessible post flight
Drexel University RockSat 12
Workbench Results
0 50 100 150 200 250 3000
50
100
150
200
250
300
Despun Platform AccelerometerCanister Accelerometer
Time (seconds)
Mea
sure
d Sp
in R
ate
(RPM
)
Drexel University RockSat 13
Lessons Learned
Usage of connectors (molex) Cannot “cram” hardware Ballasting should not be addressed during
flight week Bring complete toolkit for payload (includes
spare parts)
Drexel University RockSat 14
Conclusions
Thank You Emily!
