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Disturbance Filtering and Identification on the Naval Postgraduate School 3-Axis Spacecraft Simulator

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Author
Lau, J.
Joshi, S.
Agrawal, B.N.
Kim, J.
Date
2005
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Abstract
This paper investigates spacecraft disturbance rejection filtering for both persistent and decaying disturbances. The current study both validates the previously developed “dipole” disturbance rejection filter on a realistic non-linear spacecraft model, and extends the results to a new class of decaying disturbances. Although not designed specifically for decaying disturbances, prior investigations have demonstrated that the traditional “dipole” disturbance rejection filter attenuates both persistent periodic disturbances and decaying disturbances. Here we introduce a new filter which we call the decaying disturbance rejection filter, which has greater attenuation than the traditional filter for decaying disturbances. The new filter is also based on the internal model principle like the traditional filter. Also, it is shown that both the traditional and the new filter are not robust to frequency uncertainty. As a result, new closed-loop system identification methods are introduced to experimentally identify the disturbance frequency to be used within the filter design for both filter types.
Description
The article of record as published may be found at http://dx.doi.org/10.2514/6.2005-6244
Rights
This publication is a work of the U.S. Government as defined
in Title 17, United States Code, Section 101. As such, it is in the
public domain, and under the provisions of Title 17, United States
Code, Section 105, is not copyrighted in the U.S.
URI
http://hdl.handle.net/10945/34494
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  • Faculty and Researchers' Publications
  • Spacecraft Research and Design Center Publications

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