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Design of Robust Controllers

George, V I and Kurian, Ciji Pearl (2003) Design of Robust Controllers. In: PCIC-2003, 2003.

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Abstract

In this paper we illustrate the basic idea of analyzing and designing a robust controller for an unstable /stable plant P whose dynamics contains significant uncertainty . H∞ controller design is one of the most popular methods of modern controller design. We emphasize the design of controller for the plant P with feedback configuration, along with particular choice of weighting functions W1 and W2 there by achieving the robust performance, which naturally improves the computational efficiency of the robust controller design technique. We apply the theories of spectral factorization , inner outer factorization and by using Nahari’s theorem we write the model matching problem as a minimum distance problem and hence calculate the Youla parameter Q and derives a suitable controller C. it is observed that the designed reduced order robust controller with weighting function W1 and W2 can be related by the inequality || | W1 S|+| W2T|||∞<1. Where S is the sensitivity function and T is the complementary sensitivity function. Which can be represented in the complex plane as two disks and they are disjoint at all frequencies

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: H infinity Control, model matching problem, Naharis theorem , Youla parameterization , robust controller
Subjects: Engineering > MIT Manipal > Electrical and Electronics
Engineering > MIT Manipal > Instrumentation and Control
Depositing User: MIT Library
Date Deposited: 27 Apr 2015 07:28
Last Modified: 27 Apr 2015 07:28
URI: http://eprints.manipal.edu/id/eprint/142541

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