Title: Implementation of fixed structure QFT prefilter synthesised using interval constraint satisfaction techniques

Authors: P.S.V. Nataraj; M.M. Deshpande

Addresses: Systems and Control Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India. ' Department of Information Technology, A.C. Patil College of Engineering, Kharghar, Navi Mumbai 410 210, India

Abstract: Prefilter synthesis is one of the important design steps of Horowitz’s Quantitative Feedback Theory (QFT) to robust feedback system synthesis. The prefilter is designed to achieve tracking specifications. A new, computationally efficient approach for automation of the prefilter design step is proposed. In the proposed approach, the prefilter design problem is posed as an Interval Constraint Satisfaction Problem (ICSP) and solved using established Interval Constraint Satisfaction Techniques (ICST). To validate the above design approach we apply the method to a benchmark problem as well as laboratory set-up of industrial plant emulator and obtain simple, low-order QFT prefilters.

Keywords: interval analysis; interval constraint satisfaction; prefilter design; robust control; quantitative feedback theory; electromechanical plant; prefilter synthesis.

DOI: 10.1504/IJRS.2012.044305

International Journal of Reliability and Safety, 2012 Vol.6 No.1/2/3, pp.255 - 281

Received: 31 May 2010
Accepted: 04 Jun 2011

Published online: 27 Dec 2014 *

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