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Optimal digital design of hybrid uncertain systems using genetic algorithms

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3 Author(s)
Shieh, L.S. ; Dept. of Electr. & Comput. Eng., Houston Univ., TX, USA ; Wang, W. ; Tsai, J.S.H.

The paper presents a time-domain design methodology for optimal digital design of multivariable sampled-data parametric uncertain systems using genetic algorithms (GAs). A continuous-time parametric uncertain plant, cascaded with an analogue parametric uncertain prefilter is formulated by means of multiple linear cascaded continuous-time nominal models, generated from the perturbed system and prefilter parameters via the GAs. The global optimisation searching technique provided in GAs is employed to determine the digital interval plant, prefilter and controller from the obtained respective multiple linear digital models for finding the ranges of their respective implementation errors. As a result, the obtained digital models and controller perfected by the design engineer can be practically implemented. The searching technique is utilised to re-determine the optimal PAM or PWM digital controller cascaded with a digital prefilter for optimal digital control of the multivariable sampled-data parametric uncertain system

Published in:

Control Theory and Applications, IEE Proceedings -  (Volume:146 ,  Issue: 2 )

Date of Publication:

Mar 1999

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