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Design of optimal robust fixed-structure controllers using the quantitative feedback theory approach

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journal contribution
posted on 21.04.2009 by G.D. Halikias, Argyrios C. Zolotas, R. Nandakumar
A simple optimization algorithm is proposed for designing fixed-structure controllers for highly uncertain systems. The method can be used to automate the loop-shaping step of the quantitative feedback theory (QFT) design procedure and guarantees robust stability and performance to the feedback loop for all parameters in the plant's uncertainty set. To avoid over-designing the system, the algorithm can be used to minimize either the asymptotic gain, the open-loop crossover frequency or the 3 dB bandwidth of the closed-loop system (nominal or worst case). The proposed algorithm is illustrated with a design example involving a hydraulic actuator, carried out within a computer aided design (CAD) environment ('StdQFT' toolbox) which has been developed by the authors. Some preliminary results of this work appeared in 2002.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

HALIKIAS, G.D., ZOLOTAS, A.C. and NANDAKUMAR, R., 2007. Design of optimal robust fixed-structure controllers using the quantitative feedback theory approach. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 221(4), pp. 697-716.

Publisher

© IMechE / Professional Engineering Publishing

Version

VoR (Version of Record)

Publication date

2007

Notes

This article has been published in the journal, Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering [© PEP]. The definitive version is available at: http://dx.doi.org/10.1243/09596518JSCE305

ISSN

0959-6518

Language

en

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