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Application of Least Mean Square Algorithms to Spacecraft Vibration CompensationThis paper describes the application of the Least Mean Square (LMS) algorithm in tandem with the Filtered-X Least Mean Square algorithm for controlling a science instrument's line-of-sight pointing. Pointing error is caused by a periodic disturbance and spacecraft vibration. A least mean square algorithm is used on-orbit to produce the transfer function between the instrument's servo-mechanism and error sensor. The result is a set of adaptive transversal filter weights tuned to the transfer function. The Filtered-X LMS algorithm, which is an extension of the LMS, tunes a set of transversal filter weights to the transfer function between the disturbance source and the servo-mechanism's actuation signal. The servo-mechanism's resulting actuation counters the disturbance response and thus maintains accurate science instrumental pointing. A simulation model of the Upper Atmosphere Research Satellite is used to demonstrate the algorithms.
Document ID
19990052641
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Woodard , Stanley E.
(NASA Langley Research Center Hampton, VA United States)
Nagchaudhuri, Abhijit
(Duke Univ. Durham, NC United States)
Date Acquired
August 19, 2013
Publication Date
March 1, 1998
Publication Information
Publication: Journal of the Astronautical Sciences
Publisher: American Astronautical Society
Volume: 46
Issue: 1
Subject Category
Spacecraft Design, Testing And Performance
Meeting Information
Meeting: Space Flight Mechanics
Location: Albuquerque, NM
Country: United States
Start Date: February 1, 1995
End Date: February 28, 1995
Sponsors: American Inst. of Aeronautics and Astronautics, American Astronautical Society
Distribution Limits
Public
Copyright
Other

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