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SMALL SATELLITE ENGINEERING IN A BOX ________________________

SMALL SATELLITE ENGINEERING IN A BOX ________________________. THE EYASSAT CONCEPT OF EDUCATING ASSEMBLY, INTEGRATION AND TEST PROCEDURES FOR UNDERGRADUATE SPACECRAFT DESIGN CLASSES. DEPARTMENT OF ASTRONAUTICS 20 APRIL 2004. OBADIAH NG RITCHEY. OVERVIEW. WHAT WE DO EYASSAT CONCEPT

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SMALL SATELLITE ENGINEERING IN A BOX ________________________

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  1. SMALL SATELLITE ENGINEERING IN A BOX________________________ THE EYASSAT CONCEPT OF EDUCATING ASSEMBLY, INTEGRATION AND TEST PROCEDURES FOR UNDERGRADUATE SPACECRAFT DESIGN CLASSES

  2. DEPARTMENT OF ASTRONAUTICS 20 APRIL 2004 OBADIAH NG RITCHEY

  3. OVERVIEW • WHAT WE DO • EYASSAT CONCEPT • DIFFERENTIATING EYASSAT: PROMOTING ‘RESPONSIVE SPACE’ • WHAT I HAVE ACCOMPLISHED • IDEAS FOR THE FUTURE • ACKNOWLEDGEMENTS AND REFERENCES

  4. WHAT WE DO (USAFA & SSRC) • CAPSTONE DESIGN COURSES:  FalconSAT  FalconLAUNCH • REAL DOD SCIENCE AND PAYLOADS • ONLY UNDERGRADUATE ASTRONAUTICS PROGRAM

  5. EYASSAT CONCEPT INTRO • EYASSAT CREATED IN PART OF A REVAMPED A331 CURRICULUM • STUDENT EMPHASIS ON QUALIFICATION AND TESTING • SHADOWS THE ‘REAL AIR FORCE’ • ALLOWS FOR DEMONSTRATION AND EXPERIMENTATION OF A ‘REAL’ SPACE SYSTEM AT A FRACTIONAL COST

  6. EYASSAT CONCEPT INTRO • CONCEPT NOT USED BEFORE FOR AEROSPACE UNDERGRADUATE OR POSTGRADUATE STUDIES • CONCEPT ALLOWS FOR EXTREMELY FLEXIBLE LABORATORY EXPERIENCES

  7. THE EYASSAT STACK

  8. EYASSAT CLASSROOM PROCESS

  9. DIFFERENTIATING EYASSAT • EYASSAT IS MEANT FOR EDUCATION—NOT SPACE • EYASSAT HAS GREATER CAPABILITY (ADACS, SIZE, DECENTRALIZED COMPONENT OPERATION, INTEROPERABILITY, ‘PLUG-AND-PLAY’ HOT-SWAPPABLE MODULES) • DATA BUS MUCH MORE FLEXIBLE AND REDUNDANT (STAR VS SHARED ‘CAN-BUS’)

  10. DIFFERENTIATING EYASSAT • INTEGRATION ASPECTS NOT YET REALIZED (NATURE OF PROJECT) • SUBASSEMBLIES EASILY REPLACED • ELECTRICAL AND STRUCTURAL DESIGN ARE MORE INDEPENDENT • POWER AND UMBILICAL • MECHANICAL SIZE/COMPLEXITY • PAYLOADS (TYPE AND VOLUME AVAILABLE)

  11. DIFFERENTIATING EYASSAT • SHOCK, VIBE, THERMAL TESTING NOT YET IN THE PICTURE  • COMPONENT, SYSTEM-LEVEL AND FUNCTIONAL TESTS ARE! • CONFORMAL COAT/STAKING NOT UTILIZED (REUSABILITY ASPECT) • COMMERCIAL INTERESTS • CUBESAT ATTEMPTS TO DO ‘FALCONSAT’ WITH ‘EYASSAT’ PARTS AND BUDGET

  12. DIFFERENTIATING EYASSAT • EYASSAT DEMONSTRATES HOW THE SYSEMS INTERACT WHILE BEING ABLE TO CARRY OUT A ‘MISSION’ • THE OPERATION IS HANDS-ON, THE BUILDING IS NOT • EYASSAT HAS THE POSITIVE QUALITIES OF BOTH NANO- AND PICOSATS WHILE BEING RELIABLE AND EASILY RECONFIGURABLE

  13. WHAT I HAVE ACCOMPLISHED • 0th AND 1st ORDER NOMINAL I-V AND I-P CURVE SOLAR ARRAY CHARACTERIZATION • COMMUNICATION AND BATTERY MODULE PRODUCTION—LATER USED BY THE STUDENTS • A331 LABORATORY EXPERIENCE—AT MY OWN PACE AND DEPARTING FROM STUDENT LESSONS • RESEARCH THE OTHER ‘DOES SPACE’ UNIVERSITY PROGRAMS FOR COMPARISON

  14. WHAT I HAVE ACCOMPLISHED • COMPLETE ADDITIONAL BASELINE DATA TO AID IN ACCEPTANCE TESTS • PRODUCE NOMINAL CHARACTERIZATION DATA FOR ADCS USE—FOCUSING ON ENVIRONMENTAL VARIABLES

  15. SOLAR ARRAY PERFORMANCE

  16. EyasSAT Solar Array IV Curve 0.35 1.6 1.4 0.3 1.2 0.25 1 0.2 I vs V Current (mA) 0.8 P vs V 0.15 0.6 0.1 0.4 0.05 0.2 0 0 0 2 4 6 8 10 12 14 Voltage (V) SOLAR ARRAY PERFORMANCE

  17. ADCS POSITION SENSOR TESTING ARRANGEMENT

  18. ADCS POSITION SENSOR READINGS

  19. ADCS POSITION SENSOR READINGS

  20. IDEAS FOR THE FUTURE • GPS • DIGITAL IR AND VISIBLE SPECTRUM IMAGING • TARGET TRACKING • PROX-OPS ON AIRTABLE  (THINK: SPACE ‘BATTLEBOTS’) • COMPOSITE STRUCTURES • COLD-GAS PROPULSION MODULE

  21. ACKNOWLEDGEMENTS AND REFERENCES • DFAS, ESPECIALLY CAPT BARNHART • MR JIM WHITE, CSS • SCHAFFNER, CALPOLY PAPER AUTHOR • WERTZ AND LARSON, SMAD, ETC. • TWIGGS, STANFORD’S SSDL • GUPTA, ANUSAT LEAD, ISRO

  22. FOR MORE INFORMATION… WWW.EYASSAT.COM

  23. QUESTIONS?

  24. DEMONSTRATION

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