Design of low-order controllers satisfying sensitivity constraints for unstructured uncertain plants

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Abstract

This paper presents a simple analytically based algorithm for the design of reduced-order controllers satisfying frequency-dependent sensitivity specifications for SISO plants having unstructured uncertainty. The uncertainties can be additive as well as multiplicative, and can take the form of circles, polygons or sectors located around a nominal plant. Moreover, the circle radius and polygon and sector sizes may depend on the frequency. The proposed method is applicable to both continuous and discrete designs.

Original languageEnglish
Pages (from-to)1359-1370
Number of pages12
JournalInternational Journal of Robust and Nonlinear Control
Volume14
Issue number16
DOIs
StatePublished - 10 Nov 2004

Keywords

  • PID control
  • Sensitivity
  • Unstructured uncertainty

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