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Experimental Robust Control of Structural Acoustic RadiationThis work addresses the design and application of robust controllers for structural acoustic control. Both simulation and experimental results are presented. H(infinity) and mu-synthesis design methods were used to design feedback controllers which minimize power radiated from a panel while avoiding instability due to unmodeled dynamics. Specifically, high order structural modes which couple strongly to the actuator-sensor path were poorly modeled. This model error was analytically bounded with an uncertainty model, which allowed controllers to be designed without artificial limits on control effort. It is found that robust control methods provide the control designer with physically meaningful parameters with which to tune control designs and can be very useful in determining limits of performance. Experimental results also showed, however, poor robustness properties for control designs with ad-hoc uncertainty models. The importance of quantifying and bounding model errors is discussed.
Document ID
20040110946
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Cox, David E.
(NASA Langley Research Center Hampton, VA, United States)
Gibbs, Gary P.
(NASA Langley Research Center Hampton, VA, United States)
Clark, Robert L.
(Duke Univ. Durham, NC, United States)
Vipperman, Jeffrey S.
(Maine Univ. Orono, ME, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1998
Subject Category
Acoustics
Report/Patent Number
AIAA Paper 98-2089
Distribution Limits
Public
Copyright
Public Use Permitted.
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