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Final presentation by Michigan Tech at CanSat 2008http://www.astronautical.org/2008/06/15/cansat-2008-michigan-tech-university/
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Michigan Technological University
Aerospace Enterprise
CanSat Project
Team Joe Thompson – Team Leader, Electronics Sean Ritter – Electronics Nick Telenko-Structure, Top Deck Jeff Hanson-Structure, Top Deck Robert Emperley-Structure, Bottom Deck Nathan Beauchamp-Structure, Bottom
Deck Daniel Vanderhoof-Ground Station
Design Overview
Constructed from UHMW polyurethane and aluminum components
Detachable parachute for controlled descent
Onboard GPS for position tracking (4) uprighting legs (4) onboard cameras for panoramic
picture (not incl. final)
Top Deck Design
•Dia: 2.6 in, Deck thickness: 0.25 in, Material: ABS plastic
•Main parachute lines are attached to a parachute nut in the center of the top deck.
•Steering lines are attached spools that are driven by the motors.
•Motors attached to worm gears, which rotate the spools, make the CanSat controllable.
•Parachute motors are mounted on the underside of the top deck.
•Motor mounts are made of Lexan
Bottom view of top deck; motors, motor mounts, and worm gears
Top view of top deck; spool, gears, parachute nut
Bottom Deck Design
•Dia: 2.6 in, Deck Thickness: approx. 1.25 in at outside edge, approx. 2.0 in at center.
•Motor mounted in the center of the deck turns the center shaft which lowers the uprights, making the CanSat upright itself.
•When not lowered, uprights will tuck under the top deck and fit within our 2.6 in dia.
•Linkages are long enough that the uprights will lay flat when completely lowered.
Drawings/Photos
Holes for wire and antenna routing
All unused MCU pins brought out to header providing modularity
Surface-mount components allow for high density layout
Power Polymer Lithium/Ion
Battery—3.7 volt, 1100 mAh x 2
Specially Designed Lower Deck Compartment
Consistent Electronic Voltage of 3.3 Volts controlled by low-dropout regulator
Communication Aerocomm AC4490
Transceiver 4 mile LOS range 902-928MHz frequency range 21 gram weight 115.2 kb/s data transmission
rate
Flight Software
Language: MPLAB C30 Microchip IDE used to
write and develop code In-circuit debugging /
programming Fully integrated
software design suite Simulation capabilities
Station Integration Laptop computer running MATLAB USB radio interface Data-logging interface, no GUI was created
for this year
Cost SummaryStructure Ground Station
UHMW Plastic $40.00 Laptop $150.00Aluminum Uprights $5.00 Radio Set $125.00
Fasteners $10.00 Battery Charger $25.00Motors $60.00
Electronics ServicesPolymer Lithium Ion Batteries - 860mAh $8.95 Pcb Manufacturing $170.00
JST Vertical Connector $0.95 Solder Stencil $35.00Jumper Wire - JST Black Red $0.95
MPLAB Compatible ICD2 with USB $119.95USB Cable A to B - 6 Foot $3.95
Polarized Header for Breadboard and ICSP $1.25CAP CERAMIC 4.7UF 6.3V X5R 0603 $0.19
IC MOTOR DRVR STEPPER DUAL $1.11 Total To Date: $1,038.04CAP .1UF 16V CERAMIC X7R 0603 $0.04 Hardware Cost: $473.04
IC LDO REG 1A 3.3V SOT223-3 $1.73CAP CERAMIC 10UF 6.3V X5R 0603 $0.36
IC DSPIC MCU/DSP 64K 64TQFP $10.08SENSOR 30-120KPA SPI $20.30
CONN 20POS 2MM HEADER DUAL GOLD $1.48CONN 20POS 2MM SOCKET VERT PC MT $2.02
CABLE ASSEM 2MM 20POS F-F 2" $9.62CAP 1UF 6.3V CERAMIC X5R 0603 $0.07
CAP .47UF 6.3V CERAMIC X5R 0603 $0.05Radio $75.00GPS $100.00
Preparation & Launch
Flight Data
Flight Data
*wunderground.com history for APRSWXNET (PWS) 14 June 2008
Flight Data
Flight Data
Lessons Learned Parafoil Recovery
Extended descent timeImproved Trajectory
Control
Lessons Learned (cont.) Antenna extension
Raise from ground level for LOS
Quick portability – 10m+ extension cord
Pre-launch push-button operation demoAbility to diagnose problems early
Questions?