Performance preserving controller reduction via additiveperturbation of the closed-loop transfer function |
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Authors: | Wang G Sreeram V Liu WQ |
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Affiliation: | Dept. of Electr. & Electron. Eng., Western Australia Univ., Nedlands, WA; |
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Abstract: | An H∞ performance preserving controller order reduction method is proposed. Here performance preservation indicates that the H∞ norm bound of the closed loop transfer function with reduced-order controller is not greater than the H∞ norm bound of the closed loop transfer function with full order controller. We assume additive perturbations to the closed-loop transfer function and obtain a sufficient condition for performance preservation. Two kinds of useful weightings are derived, and the controller reduction problem is solved via a frequency weighted model reduction problem |
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