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Transfer Function Parameter Identification by Modified Relay Feedback

Publiceringsår: 2010
Språk: Engelska
Sidor: 2164-2169
Publikation/Tidskrift/Serie: 2010 American Control Conference
Dokumenttyp: Konferensbidrag


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.


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


American Control Conference, 2010
  • LCCC-lup-obsolete
  • ISSN: 0743-1619
  • ISBN: 978-1-4244-7426-4

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