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Design of control laws for flutter suppression based on the aerodynamic energy concept and comparisons with other design methodsThe aerodynamic energy method is used in this paper to synthesize control laws for NASA's Drone for Aerodynamic and Structural Testing-Aerodynamic Research Wing 1 (DAST-ARW1) mathematical model. The performance of these control laws in terms of closed-loop flutter dynamic pressure, control surface activity, and robustness is compared against other control laws that appear in the literature and relate to the same model. A control law synthesis technique that makes use of the return difference singular values is developed in this paper. it is based on the aerodynamic energy approach and is shown to yield results superior to those given in the literature and based on optimal control theory. Nyquist plots are presented together with a short discussion regarding the relative merits of the minimum singular value as a measure of robustness, compared with the more traditional measure of robustness involving phase and gain margins.
Document ID
19890043729
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nissim, E.
(NASA Flight Research Center Edwards, CA, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1989
Subject Category
Aircraft Stability And Control
Report/Patent Number
AIAA PAPER 89-1212
Accession Number
89A31100
Distribution Limits
Public
Copyright
Other

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