cansat 2008: michigan tech final presentation

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?