Transcript Drexel RockSat Team 2011-2012

Launch Readiness Review
LRR Presentation Contents
•
Section 1: Mission Overview
• Mission Statement
• Mission Objectives
•
Section 2: The Payload!
• User’s Guide Compliance
• Beta Prototype Testing
• Section 3: Check-In Readiness
• Plans for Integration
• Documentation
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Drexel RockSat Team 2011-2012
Mission Statement
Develop and test a system that will use
piezoelectric materials to convert mechanical
vibrational energy into electrical energy to
trickle charge on-board power systems.
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Mission Overview
• Demonstrate feasibility of power generation via
piezoelectric effect under Terrier-Orion flight
conditions
• Determine optimal piezoelectric material for
energy conversion in this application
• Classify relationships between orientation of
piezoelectric actuators and output voltage
• Data will benefit future RockSAT and CubeSAT
missions as a potential source of power
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Drexel RockSat Team 2011-2012
Design Overview
Microcontroller
G-switch
Batteries
Flight
Decks
Camera
Standoff
Supports
Accelerometer Array
Piezo Arrays
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Payload Design beta
• Beta payload includes
modifications to:
• Camera housing
• Organization of EPS
components on top deck
• Transistors and relays used
to control power for EPS
and VVS
• Cantilever length: 3.0 in.
Beta payload with wiring connections
ready for vibration testing
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Physical Specs eurekasat payload
Requirement
UG Spec
Mass
Status
2.42 lb
Volume
½ can
H: 4.3”
D: 9.3”
Payload CG
1”x1”x1”
x0.23” y0.21” z0.43”
Activation Method
1.SYS.2
We think so…
Structure Mounts
Top, bottom
bulkheads
Sharing
Fully Developed?
Integration Successful
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Electrical Design
PEA I
PEA II
Rectifier +
Capacitor
PEA III
Rectifier +
Capacitor
Accelerometer I
PEA IV
Rectifier +
Capacitor
Arduino
Microcontroller
Camera
Rectifier +
Capacitor
Internal
Memory
SD Card
Memory
Accelerometer II
9V Battery
G-Switch
3-AA
Batteries
Legend
Wallops
Latching
Relay
Power connection
Data connection
Power (G-switch=1)
9V Battery
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Updates Since FMSTR
• Beta prototype complete and tested
• VVS functioning
•
•
Switched to AA batteries, no regulator
Modified camera mounting bracket
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Testing Updates
• Increased length of cantilevers
• Lowered maximum output
• Alpha: over 1 V for “diving board”
• Beta: about 0.55 V
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Testing Updates
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Mission Requirements
Primary Objectives
Complete?
Power generation via the piezoelectric effect under TerrierOrion flight conditions
Yes
Classify the relationships between the orientation of
piezoelectric actuators and output voltage
Yes
Ensure system activates upon launch
Yes
Data is autonomously recorded to SD card
Yes
Secondary Objectives
Visual data recorded to SD card
Yes
Data collection systems are self powered
Yes
Voltage generated purely from launch vehicle
Yes
Accepted for flight with RockSAT-C program
Yes
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ALMOST, CAPTAIN!
Readiness
Ready!
• Travel arrangements set
• Payload is assembled and ready to go
• Integration with Temple
Almost Ready!
• Documentation
• For Drexel Payload and Canister
• Check-in Procedure
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Integration
Canister Sharing with Temple
• Method of Integration: standoffs
• Height: 9.07”
• Combined Weight: 6.74 lb
• Combined CG: x-1.32” y2.04” z2.10”
• NOTE: material properties discrepancies
• CG to be adjusted with systematic ballast
placement
• Procedure: tighten standoffs
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Complete Payload
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Complete Payload
Temple
Drexel
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Canister Integration
ø
9.30”
overall
diameter
9.07”
overall
height
6.73 lbs.
overall
weight
standoffs
means of
integration
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Action Items
• Finish up documentation
• Mostly drawings
• Parts accounting
• Tidying of documents
• Ballasting, staking, etc.
• To be completed after integration with Temple
• Mostly at Wallops
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Check-In Inspections
• Check-in procedure partially completed
• So far so good
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Drexel RockSat Team 2011-2012
Questions
• None right now! :D
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Questions?