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Design of robust failure detection filtersAn essential aspect of the design of control systems for large, flexible spacecraft is fault tolerance. Because it is anticipated that a large number of sensors and actuators will be required to realize good control over these assemblies, the detection and isolation of component failures cannot be based on direct comparisons among replicated components. Instead, the notion of 'analytic redundancy' must be employed for the FDI function. Unfortunately this makes the FDI function sensitive to modeling errors which are certain to exist in the large space structure problem due to model truncation and parameter uncertainty. This paper addresses the robustness to model error of one method of FDI residual generation - the failure detection filter. Initial designs were found to be extremely sensitive to modeling error. The sources of this sensitivity are analyzed and modifications to the design are suggested. The improved filter is shown to have much better visibility of the failure signatures relative to the background due to modeling error.
Document ID
19870026121
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
San Martin, A. M.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Vander Velde, W. E.
(MIT Cambridge, MA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Cybernetics
Accession Number
87A13395
Funding Number(s)
CONTRACT_GRANT: NAG1-126
Distribution Limits
Public
Copyright
Other

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