A combined iterative scheme for identification and control redesigns

Paresh Date, Alexander Lanzon

    Research output: Contribution to journalArticlepeer-review


    This work proposes a unified algorithm for identification and control. Frequency domain data of the plant is weighted to satisfy the given performance specifications. A model is then identified from this weighted frequency domain data and a controller is synthesised using the ℋ∞, loopshaping design procedure. The cost function used in the identification stage essentially minimizes a tight upper bound on the difference between the achieved and the designed performance in the sense of the ℋ∞ loopshaping design paradigm. Given a model, a method is also suggested to re-adjust model and weighting transfer functions to reduce further the worst case chordal distance between the weighted true plant and the model. Copyright © 2004 John Wiley & Sons, Ltd.
    Original languageEnglish
    Pages (from-to)629-644
    Number of pages15
    JournalInternational Journal of Adaptive Control and Signal Processing
    Issue number8
    Publication statusPublished - Oct 2004


    • ℋ∞ loopshaping
    • Identification for control
    • Joint identification and control
    • V-gap metric


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