Experimental Testing of a Combined Attitude Control and Energy Storage for Small Satellites
- Paper number
IAC-08.B4.6.B5
- Author
Dr. Vaios Lappas, Surrey Space Centre, University of Surrey, United Kingdom
- Coauthor
Mr. David Richie, Surrey Space Centre, University of Surrey, United Kingdom
- Coauthor
Mr. George Prassinos, Surrey Satellite Technology Ltd., United Kingdom
- Year
2008
- Abstract
A recent effort to develop single-gimbal variable-speed control moment gyroscopes (VSCMGs) for a combined energy storage and attitude control subsystem (ESACS) on small satellites has culminated in laboratory validation of the concept. A single actuator prototype comprised of a cutting-edge carbon fibre rotor and COTS motor/generator components has been developed, balanced, bench tested, and integrated onto a spherical air-bearing structure. This structure is used to demonstrate the primary capability of a VSCMG to act as a dynamo whilst simultaneously changing a spacecraft’s orientation in a controlled fashion. As originally predicted, the actuator’s flywheel spins up when energy is supplied, (supported via a Direct Energy Transfer power architecture) then spins down when the energy source is removed, porting the energy released to run a resistive load. The work presented gives an overview of the governing principles of the technology, addresses the underlying mission and design requirements, and presents the prototype design. Then, effectiveness of the prototype integrated on a 3-axis test article is presented along with its associated test data. Finally, discussion of these results and identification of future research concludes the talk. The benefits of this technology for future space missions are that system consolidation permits mass reduction, higher instantaneous peak power is available as compared to conventional secondary battery systems, state-of-charge measurement is readily available from wheel speed feedback, and torque amplification through gimballing permits efficient actuator control. The technology demonstrated is exciting and leaves the door open for future development via inclusion of magnetic levitation.
- Abstract document
- Manuscript document
IAC-08.B4.6.B5.pdf (🔒 authorized access only).
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