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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. 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

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

DEPARTMENT OF ASTRONAUTICS

20 APRIL 2004

OBADIAH NG RITCHEY


Overview
OVERVIEW

  • WHAT WE DO

  • EYASSAT CONCEPT

  • DIFFERENTIATING EYASSAT: PROMOTING ‘RESPONSIVE SPACE’

  • WHAT I HAVE ACCOMPLISHED

  • IDEAS FOR THE FUTURE

  • ACKNOWLEDGEMENTS AND REFERENCES


What we do usafa ssrc
WHAT WE DO (USAFA & SSRC)

  • CAPSTONE DESIGN COURSES:

     FalconSAT

     FalconLAUNCH

  • REAL DOD SCIENCE AND PAYLOADS

  • ONLY UNDERGRADUATE ASTRONAUTICS PROGRAM


Eyassat concept intro
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


Eyassat concept intro1
EYASSAT CONCEPT INTRO

  • CONCEPT NOT USED BEFORE FOR AEROSPACE UNDERGRADUATE OR POSTGRADUATE STUDIES

  • CONCEPT ALLOWS FOR EXTREMELY FLEXIBLE LABORATORY EXPERIENCES




Differentiating eyassat
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’)


Differentiating eyassat1
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)


Differentiating eyassat2
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


Differentiating eyassat3
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


What i have accomplished
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


What i have accomplished1
WHAT I HAVE ACCOMPLISHED

  • COMPLETE ADDITIONAL BASELINE DATA TO AID IN ACCEPTANCE TESTS

  • PRODUCE NOMINAL CHARACTERIZATION DATA FOR ADCS USE—FOCUSING ON ENVIRONMENTAL VARIABLES



Solar array performance1

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





Ideas for the future
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


Acknowledgements and references
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


For more information
FOR MORE INFORMATION…

WWW.EYASSAT.COM




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