Please use this identifier to cite or link to this item: http://rportal.lib.ntnu.edu.tw:80/handle/77345300/32110
Title: Digital redesign of uncertain interval systems based on time-response resemblance via particle swarm optimization
Authors: 國立臺灣師範大學電機工程學系
Chen-Chien Hsu
Geng-Yu Lin
Issue Date: 1-Jul-2009
Publisher: Elsevier
Abstract: In this paper, a particle swarm optimization (PSO) based approach is proposed to derive an optimal digital controller for redesigned digital systems having an interval plant based on time-response resemblance of the closed-loop systems. Because of difficulties in obtaining time-response envelopes for interval systems, the design problem is formulated as an optimization problem of a cost function in terms of aggregated deviation between the step responses corresponding to extremal energies of the redesigned digital system and those of their continuous counterpart. A proposed evolutionary framework incorporating three PSOs is subsequently presented to minimize the cost function to derive an optimal set of parameters for the digital controller, so that step response sequences corresponding to the extremal sequence energy of the redesigned digital system suitably approximate those of their continuous counterpart under the perturbation of the uncertain plant parameters. Computer simulations have shown that redesigned digital systems incorporating the PSO-derived digital controllers have better system performance than those using conventional open-loop discretization methods.
URI: http://rportal.lib.ntnu.edu.tw/handle/77345300/32110
ISSN: 0019-0578
Other Identifiers: ntnulib_tp_E0607_01_016
Appears in Collections:教師著作

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