SMALL SATELLITE ENGINEERING IN A BOX ________________________

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SMALL SATELLITE ENGINEERING IN A
BOX________________________

• THE EYASSAT CONCEPT OF EDUCATING ASSEMBLY,
  INTEGRATION AND TEST PROCEDURES FOR UNDERGRADUATE
  SPACECRAFT DESIGN CLASSES

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OBADIAH NG RITCHEY

• DEPARTMENT OF ASTRONAUTICS
• 20 APRIL 2004

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OVERVIEW

• WHAT WE DO
• EYASSAT CONCEPT
• DIFFERENTIATING EYASSAT PROMOTING RESPONSIVE
  SPACE
• WHAT I HAVE ACCOMPLISHED
• IDEAS FOR THE FUTURE
• ACKNOWLEDGEMENTS AND REFERENCES

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WHAT WE DO (USAFA SSRC)

• CAPSTONE DESIGN COURSES
• ? FalconSAT
• ? FalconLAUNCH
• REAL DOD SCIENCE AND PAYLOADS
• ONLY UNDERGRADUATE ASTRONAUTICS PROGRAM

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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

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EYASSAT CONCEPT INTRO

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

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THE EYASSAT STACK
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EYASSAT CLASSROOM PROCESS
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DIFFERENTIATING EYASSAT

• EYASSAT IS MEANT FOR EDUCATIONNOT 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)

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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)

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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

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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

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WHAT I HAVE ACCOMPLISHED

• 0th AND 1st ORDER NOMINAL I-V AND I-P CURVE SOLAR
  ARRAY CHARACTERIZATION
• COMMUNICATION AND BATTERY MODULE PRODUCTIONLATER
  USED BY THE STUDENTS
• A331 LABORATORY EXPERIENCEAT MY OWN PACE AND
  DEPARTING FROM STUDENT LESSONS
• RESEARCH THE OTHER DOES SPACE UNIVERSITY
  PROGRAMS FOR COMPARISON

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WHAT I HAVE ACCOMPLISHED

• COMPLETE ADDITIONAL BASELINE DATA TO AID IN
  ACCEPTANCE TESTS
• PRODUCE NOMINAL CHARACTERIZATION DATA FOR ADCS
  USEFOCUSING ON ENVIRONMENTAL VARIABLES

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SOLAR ARRAY PERFORMANCE
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SOLAR ARRAY PERFORMANCE
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ADCS POSITION SENSOR TESTING ARRANGEMENT
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ADCS POSITION SENSOR READINGS
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ADCS POSITION SENSOR READINGS
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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

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ACKNOWLEDGEMENTS AND REFERENCES

• DFAS, ESPECIALLY CAPT BARNHART
• MR JIM WHITE, CSS
• SCHAFFNER, CALPOLY PAPER AUTHOR
• WERTZ AND LARSON, SMAD, ETC.
• TWIGGS, STANFORDS SSDL
• GUPTA, ANUSAT LEAD, ISRO

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FOR MORE INFORMATION

• WWW.EYASSAT.COM

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QUESTIONS?
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DEMONSTRATION