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Magnetically suspended reaction wheelsMagnetic suspensions offer several advantages over conventional bearings, arising because of the contactless nature of the load support. In application to spacecraft reaction wheels, the advantages are low drag torque, wearfree, unlubricated, vacuum-compatible operation, and unlimited life. By the provision of redundancy in the control electronics, single-point failures are eliminated. The rational for selection of a passive radial, active axial, dc magnetic suspension is presented, and the relative merits of 3-loop and single-loop magnetic suspensions are discussed. The design of a .678 N-m-sec (.5 ft-lb-sec) reaction wheel using the single loop magnetic suspension was developed; the design compares favorably with current ball bearing wheels in terms of weight and power.
Document ID
19760012100
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sabnis, A. V.
(Sperry Flight Systems Phoenix, AZ, United States)
Stocking, G. L.
(Sperry Flight Systems Phoenix, AZ, United States)
Dendy, J. B.
(Sperry Flight Systems Phoenix, AZ, United States)
Date Acquired
August 8, 2013
Publication Date
August 1, 1975
Publication Information
Publication: NASA. Kennedy Space Center 9th Aerospace Mech. Symp.
Subject Category
Spacecraft Design, Testing And Performance
Accession Number
76N19188
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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