Gimballing magnetic bearing reaction wheel with digital controller

Details Gimballing magnetic bearing reaction wheel with digital controller Gimballing magnetic bearing reaction wheel with digital controller

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.591...35g&link_type=abstract

In: Proceedings of the 11th European Space Mechanisms and Tribology Symposium, ESMATS 2005, 21-23 September 2005, Lucerne, Switz

Physics

Pointing Mechanisms

Scientific paper

Magnetic bearing reaction wheels provide a number of interesting advantages over ball bearing wheels. They allow high-speed operation with minimum loss torque and generate substantially less micro-vibrations. However, they require dedicated, demanding control electronics. A conroller based on a Digital Signal Processor has been developed. The controller was tested with an 87 Nms wheel prototype equipped with a magnetic bearing allowing active control in five axes. The wheel provides low-noise operation from 0 to 8000 rpm with a rotor gimballing capability of up to ±1.7°. The paper reviews the design principles and presents relevant test results, e.g. regarding the active suppression of micro-vibrations.

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