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Progress in multirate digital control system designA new methodology for multirate sampled-data control design based on a new generalized control law structure, two new parameter-optimization-based control law synthesis methods, and a new singular-value-based robustness analysis method are described. The control law structure can represent multirate sampled-data control laws of arbitrary structure and dynamic order, with arbitrarily prescribed sampling rates for all sensors and update rates for all processor states and actuators. The two control law synthesis methods employ numerical optimization to determine values for the control law parameters. The robustness analysis method is based on the multivariable Nyquist criterion applied to the loop transfer function for the sampling period equal to the period of repetition of the system's complete sampling/update schedule. The complete methodology is demonstrated by application to the design of a combination yaw damper and modal suppression system for a commercial aircraft.
Document ID
19910018563
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Berg, Martin C.
(Washington Univ. Seattle, WA, United States)
Mason, Gregory S.
(Washington Univ. Seattle, WA, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Subject Category
Cybernetics
Report/Patent Number
NASA-CR-187561
NAS 1.26:187561
Accession Number
91N27877
Funding Number(s)
PROJECT: RTOP 505-64-30-01
CONTRACT_GRANT: NAG1-1055
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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