{ Dynamo Careful Harry Glenda Alvarenga J.J. Busse Emily Eggers Adam Kemp Gabrielle Massone Dalton...
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Transcript of { Dynamo Careful Harry Glenda Alvarenga J.J. Busse Emily Eggers Adam Kemp Gabrielle Massone Dalton...
{
DynamoCareful Harry
Glenda AlvarengaJ.J. BusseEmily EggersAdam KempGabrielle MassoneDalton SmithCorey Wilson
To Investigate High Altitude Power Generation from the motion of Dynamo using a Kinetic Energy Generator
(K.E.G.) Expected to prove Kinetic Energy Generation is a viable source of power in spacecraft
Mission Overview
Dimensions changed to fulfill weight requirement (23x23x9cm)
Rebuilt new structure with improved insulation
Design Overview
Design Overview
Arduino configured with K.E.G
Design Overview
Canon SD780 Camera
HOBO Data Logger
Design Overview
Heater and Batteries
Functional Block Diagram
{Following Launch, Nov 6, 2011
Results and Failure Analysis
Operated and logged data successfully for 96.7 minutes (roughly 86 minutes of flight)
Stopped at 26,500 ft (entering troposphere)
Noticeable spike in acceleration the instant before
Power cord likely became dislodged upon parachute deployment in lower atmosphere
Altitude correlates, and power found disconnected upon recovery
Analysis: Arduino
Original AttoPilot Voltage Sensor failed before launch
Subsequent transformers, resistors, and circuits routed through Arduino failed to collect data during flight
Lack of appropriate resistors last-minuteAnalysis: Voltage Sensor
Analysis: Accelerometer
6 270 534 798 1062132615901854211823822646291031743438370239664230449447585022528655500
100
200
300
400
500
600
700
800
X Y Z
Time Since Arduino Power-On (seconds)
Accele
rati
on
(each v
alu
e p
ast
base
line =
1%
off
9.8
m/s
^2)
PreLaunch Launch
Burst
Spike be-fore Power Loss
Did not operate during Flight due to Sensor Failure
Mission Simulation Emulated accelerations between 0 - 1
G Successfully produced voltage!
Analysis: K.E.G.
Analysis: Voltage Graph
0 0.1 0.2 0.25 0.3 0.4 0.5 0.6 0.7 0.75 0.8 0.9 10
2
4
6
8
10
12
0 0
4.16
6.12
2.66
9.28
8.64
10.3610.66
11.16
10.110.42
7.16
Average Voltage over 5 Trials
Fraction of G (9.8 m/s^2)
Volt
age (
mil
livolt
s)
HOBO gathered data throughout flight External temperature probe found
disconnected upon recovery Likely caused by movement of other
dislodged objects Recorded Internal Temperatures below -
28° C Did not meet RFP requirement (-10° C)
Analysis: HOBO
HOBO Internal Temp
Lowest Temperatur
e
Temperature dropped to -28° C Heater disconnected from power Cause: Additional, un-insulated hole added
for camera upon camera switch failure Extreme external temps, beyond tested
values Fix: Seal hole, reinforce heater to battery
connections, add insulation Testing: cold test indicates temperatures
above -10° C However, difficult to emulate -70° C
External
Analysis: Insulation & Heater
Camera successfully ran for most of flight
Took images periodically and saved on SD card
Retained power through half of troposphere
Analysis: Camera
Camera Image
8:26:20 (approx.) camera failure Altitude: about 15,225 ft
Correlated EOSS and photo time stamps Dislodged upon recovery Causes of Failure
Impact (disproved by drop/shake testing) Cold (disproved by cold testing) Power button hit when dislodged (Most
Probable, and Repeatable) Fix: Secure Better Within Box, Insulate
Analysis: Camera
Components dislodged Batteries disconnected, loss of power Only half of payload collected data K.E.G. didn’t function during flight
Failure Summary
Conclusion
Despite some failures, mission still successful
Accelerometer data and KEG ground testing suggests kinetic energy could be a viable source of energy
Would required more refined, sensitive generator
Biggest obstacle is lack of noticeable acceleration during majority of ascent
{Appendices
Secure components better More extensive testing, earlier More research into appropriate parts Receive components earlier to extend
testing time Add more insulation, or reorganize
structure to improve thermal properties
Lessons Learned
Ready For Flight
Secure all components more precisely with electrical tape, Velcro and hot glue
Connect camera to proper switch, and seal exposed hole
New batteries and securing of switches before flight
Hobo programmed to start at new flight time for data collection
Thicker copper wire (12 gauge) and more coils on K.E.G. for higher voltage generation
Refined voltage sensor compatible with Arduino Uno
Store Dynamo in cool, dry place with batteries disconnected until flight time
No perishable objects inside
Final Mass: 830 g Final Budget: $213.78
Mass and Weight Budget
{
Compliance Matrix# Requirement Fulfillment
1.01 Our experiment shall use the motion of the BalloonSat to generate electricity and charge a battery.
Successful construction and testing of generator.
1.02 After the BalloonSat lands it shall still be in working order.
Successful kick and drop tests.
1.03 The flight string interface shall be a PVC tube that runs through the BalloonSat and shall not pull through the BalloonSat or interfere with the string. We shall use washers on both sides of the tube and pins that dissipate the pressure onto the washer, preventing the string from being pulled through.
Successful whip tests and integration of flight tube through center of structure.
1.04 The BalloonSat shall remain above -10° C internally during the entire flight.
Successful cold tests and construction of heater.
1.05 The total weight shall remain less than or equal to 850 grams.
Total weight was less than 850 grams.
1.06 We shall acquire the ascent and descent rates of the BalloonSat.
Accelerometer measures changes in flight velocities.
1.07 Our design shall include a HOBO H08-004-02.
Successful integration and data collection during cold test.
1.08 Our design shall include an external temperature cable.
External cable is connected to HOBO.
1.09 Our design shall allow for a Canon SD780.
Successful integration of camera in the corner of Dynamo.
1.10 BalloonSat shall include an active heater system weighing 100 grams with batteries.
Successful construction and test of heater.
1.11 BalloonSat shall be made of foam core.
Successful construction of structure using foam core.
1.12 Our budget shall include a parts list, including spare parts.
Budget is complete and maintains a surplus.
1.13 The design shall allow for and present on the outside of the satellite contact information for the Careful, Harry! team as well as an American flag.
Successful placement of USA flag and contact information on exterior.
1.14 All units presented in the design, construction, and use of the satellite shall be expressed only in the metric system.
Metric system was used for all calculations and dimensions
1.15 The satellite shall be fully constructed and prepared for launch and recovery no later than November 5, 2011, and at least one team member shall agree to participate in the retrieval of the satellite.
Successful construction and test of entire satellite and components.
1.16 Nobody, at any time, or in any phase of this project, shall be injured in any way.
No one was injured during construction and testing.
1.17 All hardware and other materials used are a part of the Gateway to Space program, and shall return to Professor Koehler at the end of the semester in full working order and absolutely no damages.
All material is in working order with no damages.
1.18 All purchases using Professor Koehler's CU Visa for parts shall be recorded in extreme detail on the budget, and all receipts from any purchase made shall be kept and turned in to Professor Koehler within 48 hours of the purchase. Furthermore, a copy of the Gateway order form, HW 04, shall be provided alongside every purchase that is made. These purchases shall only be made after an appointment with Professor Koehler.
Successful recording of purchases, and submission of all receipts for payment and/or reimbursement.
1.19 The satellite design shall not allow for any living organism to be included on the payload.
Payload does not include any living organisms.
1.20 The design of the satellite shall include a visual indicator on the outside of the craft that confirms the payload is fully functional and running.
Switches, button, and flashing LED light indicate proper function.
Message To Next Semester
Choose a challenging yet feasible project Meet early and often with team Tim May and ITL staff are great
resources Secure internal components as best as
you can Extra weight, use it for insulation Be friendly and work well with your
teammates Don’t give up and work hard