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Record Details

Record 34 of 9951
Dither Helps Compensate For Friction In Reaction Wheel
Author and Affiliation:
Stetson, John B., Jr.(General Electric Co.)
Abstract: Dither control and generator unit incorporated into reaction-wheel attitude-control system to help compensate for error caused by friction in reaction-wheel bearings at and near zero speed of wheel. Reaction-wheel attitude-control system designed primarily to maintain desired orientation of spacecraft but also useful in maintaining desired orientation of terrestrial antenna, optical instrument, or other device on aircraft, ship, land vehicle, or other moving platform. Alternating torque sufficient to overcome static friction applied at low speed.
Publication Date: Aug 01, 1994
Document ID:
19940000425
(Acquired Dec 28, 1995)
Accession Number: 94B10425
Subject Category: ELECTRONIC SYSTEMS
Report/Patent Number: GSC-13353
Document Type: NASA Tech Brief
Publication Information: NASA Tech Briefs (ISSN 0145-319X); 18; 8; P. 40
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ATTITUDE CONTROL; FRICTION; REACTION WHEELS
Availability Source: National Technology Transfer Center (NTTC), Wheeling, WV
Availability Notes: Additional information available through: National Technology Transfer Center (NTTC), Wheeling, WV 26003, (Tel: 1-800-678-6882).
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