Team Lightning RodFinal Presentation

Fall 2010 Rev D

11/2/2010

Trevor LukeChris BennettMatt Holmes

Sushia Rahimizadeh

Alex ShelanskiMatthew Dickinson Jesse Ellison

11/30/2010

Mission Overview Objective

To determine if future spacecraft will be able to utilize energy generated by vibrational and rotational motion as additional energy sources

To determine if more energy can be generated from vibrational motion or rotational motion

What we hope to prove and discover A significant amount of energy can be produced from the motion of the satellite A satellite can generate enough energy to power some systems

Hypothesis Rotational motion will produce more energy than vibrational motion

Why we are doing this mission To develop an alternative method of generating power for spacecraft

Vibrational Generator

Rotational Generator

Satellite

Functional Block Diagram

Electromagnetic Generator

Battery Pack

Camera

Heater

Switch

Hobo

Power

Power

Electromagnetic Generator

Functional Block Diagram

Switch

Storage

Actual Flight

Launch Recap• Last minute adjustments during drive to launch site

• Jesse launched satellite

• Total flight time 2 hrs. 15 min.

• Entire team retrieved satellite

• Rotational Generator broke during flight

• Vibrational Generator produced energy

Interior of Box after recovery

Us gathering the voltage data

Results

Expected

• Energy output (could not determine without accurate acceleration data)

• Rotational Generator produce more energy than Vibrational Generator

Actual

• Rotational Generator produced 0 joules

• Vibrational Generator produced 4.76 kJ

Analysis

• Did the generators capture energy?– Rotational Generator was damaged• Can assume that battery voltage increase was negligible

– Vibrational Generator survived• Increased the battery voltage

• Vibrational generator was completely responsible for battery pack voltage increase

Analyzing how batteries Charge

DATA

• Battery pack initial charge: 3.84 V

• Battery pack final charge: 4.02 V

• Increase: 0.18 V– 0.18 V increase on 7350 mAh pack– Translates to 1.323 Watt-Hours

• Total electrical energy captured: 4672.8 J

Battery Arrangement

• Asymmetrical

Reversed Battery

Why didn’t it drain?

Diode turn on threshold not reached

Temperature

00:20.030:20.000:20.030:20.000:20.030:20.000:20.030:20.000:20.030:20.000:20.030:20.000:20.030:20.000:20.0-80

-60

-40

-20

0

20

40

Internal Temperature C ̊External Temperature C ̊

Lowest Internal Temperature: -12.29

Lowest External Temperature: -69.16

Burst

Relative Humidity

00:20.0 26:20.0 52:20.0 18:20.0 44:20.0 10:20.0 36:20.0 02:20.0 28:20.0 54:20.0 20:20.0 46:20.0 12:20.0 38:20.0 04:20.0 30:20.0 56:20.00

5

10

15

20

25

30

35

40

45

RH (%)

RH (%)

Failure Analysis• Computer Program

• Mechanical failure of rotational generator

• Temperature and humidity had no effect

• Suspected failure prior to launch– Believed that rotor got jammed while assembling

satellite• No motion, no energy captured

Recreating our FailureRecreating the Rotational Generator failure:

1. We reattached the battery pack inside the satellite and attempted to simulate flight

2. We calculated the time it took for the battery pack to fall

3. We knew from the cold test that if a battery fell during flight, it would destroy the rotational generator and no energy would be produced.

4. The battery pack fell off extremely quickly, making us believe it could’ve happened early in flight, thus the reason for the Rotational Generator Failure.

Recreating our failure

Battery pack fell

Conclusions

1. Both generators produce energy on ground

2. The Vibrational Generator was successful and produced energy

3. The Rotational Generator faced complications and failed during flight, thus producing no detectable energy

APPENDIX

Lessons Learned1. Understand what data needs to be collected and start

programming ASAP

2. Manage time better (stick to the schedule)

3. Have more buffers for failure

4. Experiments that seem simple take more work and troubleshooting than expected. Simplify experiment as much as possible.

5. Building your own components, even if it sounds simple, isn’t… ever.

6. Utilize resources, especially people

Re-flight

The payload should be stored anywhere that the magnetic fields within it will not interfere with its surroundings

The payload can be activated by a switch.

To fulfill the original design requirements, the satellite needs to be rewired, and the program finished

RequirementHow it will be Accomplished

Shall collect and analyze data through additional experiments Charged batteriesBalloonSat should be returned working DoneFlight String interface tube Whip TestKeeping internal temperature above -10C It was -12Total wieght shall not exceed 850g BudgetAcquire ascent and descent rates of the flight string HOBOAllow for HOBO DesignAllow for external temperature cable DesignAllow for Camera DesignAllow for Heater DesignShall be made of foam core DesignParts list and budget shall include spare parts BudgetHave contact information written on the outside, along with flag DoneProposal, design, and other units shall be in metric DoneLaunch day schedule DoneNo one shall get hurt DoneAll hardware should get returned working DoneKeep detailed budget BudgetAll purchases shall have receipts DoneHave fun and be creative DoneNothing alive will be permitted as payload Done

RFP Requirements

BudgetPart

Qty Units Source $Part

$Ship Cost

Mass

9V Batteries 4 per/pack McGuckin ##### $ - ##### 184 gAA Lithium Batteries Spacegrant $ - $ - $ - 29 gAccelerometers 2 SparkFun ##### $ - ##### 4 gAluminum Tape 1 McGuckin ##### $ - ##### 20 gAluminum Tube 2 McGuckin ##### $ - ##### 17 gAluminum Flat Plate 1 McGuckin ##### $ - ##### gBearing 1 Mcguckin ##### $ - ##### 20 gCamera 1 - Spacegrant $ - $ - $ - 180 gCapacitor 20 - mouser.com ##### #### ##### 2.5 gSD Card 1 - mouser.com ##### #### ##### 0.1 gDevelopment Board 1 SparkFun ##### #### ##### 30 g

Flight tube, anti-abraision washers, paperclips Spacegrant $ - $ - $ - 36 gFoam Core 3 Sheet Spacegrant $ - $ - $ - 200 gHeater 1 - Spacegrant $ - $ - $ - 25 gHobo 1 - Spacegrant $ - $ - $ - 26 gHot Glue 4 - Spacegrant $ - $ - $ - 38 gInsulation 1 sheet McGuckin 27 gLDO Regulator 1 - mouser.com ##### #### ##### 3.5 gMachine Screw 8 Mcguckin ##### $ - #####Machine Screw 4 McGuckin ##### $ - #####

Magnets 16.75x.75x .25 in Magnet4less.com ##### #### ##### 207 g

Magnet Wire ITLL ##### #### ##### 52 gMicrocontroller 2 - SparkFun ##### #### ##### 4 gNuts 8 Mcguckin ##### $ - #####Plexi glass 1 ITLL $ - $ - $ - 31 gRelays 4 - mouser.com ##### #### ##### 12 gRubber Bumpers 2 Home Depot ##### $ - ##### g

Spring Steel 1(.5x .015) inx10ft McMaster.com ##### #### ##### 11 g

Switches 2 - mouser.com ##### #### ##### 4 gVelcro Spacegrant $ - $ - $ - 24 g

Type

EnergizerEnergizer

Neodymium Magnets

CanonTAP156K010KingstonDEV-00022

----

AMEILI7CCB30mm

-

60mm

-CWSC11JFAF

PIC16F887-

V23079A100

Budget $ 300.00 Cost of Supplies $ 244.45 Hardware Mass 1188.58gFinal Mass 1200g

Budget

Message to Next SemesterDear next semester,

1. Schedule to finish a few weeks ahead of time to leave time for troubleshooting.

2. Understand what data is being collected and start programming at least a month before launch.

3. Start all aspects of the project early because certain aspects will take more time than is expected.

4. If experiment requires homemade components, stay up late to get them finished rather than put them off till ‘tomorrow’ because they will need modification.

5. Divide into pairs and work on different aspects of the project, then go over everyone's work during weekly meetings.

6. Set aside at least 10 hours per week to work on project. Do not take this course if you cannot make the time commitment. Your team-mates can’t afford to have members who do not carry enough of their own weight.