1. P07521: Bi-Directional Reflectance Distribution Function (BRDF) Imaging Platform
Dr. Marcos Esterman Faculty Guide
W. Casolara Project Leader
M. Harris Lead Engineer
K. Berens Mechanical Engineer
R. Andol Mechanical Engineer
R. Strebig Mechanical Engineer
R. Jaromin Electrical Engineer
Sponsor: Chester F. Carlson Center for Imaging Science
KGCOE Multidisciplinary Sr. Design
R•I•T

2. P07521: Project Description
The mission of this student team is to develop a fully autonomous imaging platform for deployment on a range of vehicles, capable of imaging across a complete hemispherical field of view to measure a target's BRDF. Initial deployment vehicles include full-scale aircraft and ground based vehicles, while future vehicle platforms may include lighter-than-air vehicles and unmanned aerial vehicles.
will
KGCOE Multidisciplinary Sr. Design
R•I•T

3. P07521: High Level Needs
Instantaneously look at an object from all possible vantage points before the sun moves
Come up with the shapes of the Bi-directional Reflectance Distribution Functions (BRDF) of natural targets outside on a clear day
50-70 degree angle from horizontal on target
Log GPS coordinates with each picture taken
Time stamp on pictures to know when it was taken
Keep the system nearly level while imaging
Robust enough to prevent damage of equipment
Onboard power
will
KGCOE Multidisciplinary Sr. Design
R•I•T

4. P07521: Design Concept Dampened Stabilization System Batteries
PC 104 Computer
Matt
GPS Unit
Camera Mount and Motor
Polycarbonate Dome
KGCOE Multidisciplinary Sr. Design
R•I•T

5. P07521: Key Assumptions Flying in Visual Flight Rules (VFR) conditions
Clear day, 1,000 ft ceiling
Winds <15 kts
Racetrack flight path to be set up by user
Path over target for which the platform will take data
Camera hanging vertical as result of passive stabilization
Not completely accurate, need to sense pitch/yaw rate
Matt
KGCOE Multidisciplinary Sr. Design
R•I•T

6. P07521: Technical Risk Assessment
Risk: Sensing Orientation of Aircraft for Post Processing Adjustment
Passive stabilization system susceptible to misalignment due to G force
Throws off angle calculations
Need assumption of camera hanging vertical
Reviewed possible solutions with project team
Proposed Mitigation:
Stochastic Sensor
Log orientation of plane through pitch/yaw rates
Data corrected in post processing
Rick
KGCOE Multidisciplinary Sr. Design
R•I•T

7. P07521: Technical Risk Assessment
Risk: Write speed of Compact Flash card
5º Angular resolution requires 5 pictures per second in certain situations
Requires significant amount of computing power to process
PC104 Board needs to write to memory quickly enough to process next picture
Proposed Mitigation:
Verify write speed once Compact Flash card is selected
Test system in lab to verify picture acquisition rate
Keep hard drive option available
Bob
KGCOE Multidisciplinary Sr. Design
R•I•T

8. P07521: Product Development Process Phase
Phase 0: Planning
Phase 1: Concept Development
Phase 2: System Level Design
Phase 3: Detailed Design
Phase 4: Testing and Refinement
Ross
MSD I
MSD II
Working Model 1 2 3 4
Current Phase of Development
KGCOE Multidisciplinary Sr. Design
R•I•T

9. P07521: Current State of Design
Design meets all customer needs
Design meets engineering specifications for full system and subsystems except:
2 cm over Pico-Satellite dimensions (10x10x12)
Optical dome size
Bill of Materials complete, used $981 of $1000 available in budget
Mitigations:
Crab angle adjustments will be made in post-processing, not actively
Flight plan details to be worked out in SDII
Kate
KGCOE Multidisciplinary Sr. Design
R•I•T

10. P08907: MSD II Project Schedule Milestones
Mar 09: All parts on order
Mar 23: Review of final design based on feedback and manufacturing specs
Apr 06: Prototype built and ready for testing
Apr 13: Performance Testing
Vibration
Vehicular
May 04: Functional review: Design Verification Testing Results
May 11: Documentation Finalized: DHF, Formal Paper, Poster
May 18: Project Review - Phase 4 Completion
Kate
KGCOE Multidisciplinary Sr. Design
R•I•T

11. Questions?
KGCOE Multidisciplinary Sr. Design
R•I•T