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Transfer Function Parameter Identification by Modified Relay Feedback

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Author

Summary, in English

This paper proposes a transfer function parameter identification method, applicable to SISO systems of any order. Parameter identification is posed as a (non-convex) squared output error minimization problem, numerically solved utilizing Newton-Raphson iteration with back tracking line search. Focus lies on computing the cost function gradient and Hessian with respect to the parameter vector and on finding a feasible start point. The method is demonstrated for FOTD model identification. A modified relay non-linearity is utilized in order to obtain most input signal energy at a predefined phase, without a priori system information. The identification method is evaluated on a batch of common process industry processes. Finally, conclusions and suggestions on future work are provided.

Publishing year

2010

Language

English

Pages

2164-2169

Publication/Series

2010 American Control Conference

Document type

Conference paper

Topic

  • Control Engineering

Keywords

  • relay
  • identification
  • parametric
  • transfer function
  • state space
  • FOTD

Conference name

American Control Conference, 2010

Conference date

2010-06-30 - 2010-07-02

Conference place

Baltimore, MD, United States

Status

Published

Project

  • Automatic Tuning
  • PICLU

Research group

  • LCCC

ISBN/ISSN/Other

  • ISSN: 0743-1619
  • ISBN: 978-1-4244-7426-4