A fuzzy mixed H2-H-infinity optimized design of decentralized control for nonlinearinterconnected dynamic delay systems

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Title:	A fuzzy mixed H2-H-infinity optimized design of decentralized control for nonlinearinterconnected dynamic delay systems
Authors:	黃志良
Contributors:	淡江大學電機工程學系
Date:	2008-11
Issue Date:	2011-10-15 01:08:42 (UTC+8)
Abstract:	Each subsystem of a nonlinear interconnected dynamic delay system (NIDDS) is first approximated by a weighted combination of L transfer function delay systems (TFDSs). The H 2 -norm of the difference between the transfer function of the reference model and the closed-loop transfer function of the kth TFDS of subsystem i is then minimized to obtain a suitable frequency response. Because the output disturbance of the kth TFDS, including the interconnections coming from the other subsystems, the approximation error of the ith subsystem, and the interactions resulting from the other TFDSs, is not small and includes various frequencies, the H ℞ -norm of the weighted sensitivity function between the output disturbance and its corresponding output of the kth TFDS is simultaneously minimized to attenuate its effect. In addition, an appropriate selection of the weighted function for the sensitivity can reject the specific mode of the output disturbance. Finally, the stability of the overall system is verified by the concept of L 2 n -stable with finite gain.
Relation:	IEEE Transactions on Fuzzy Systems
Appears in Collections:	[Graduate Institute & Department of Electrical Engineering] Journal Article

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