Industrial Adaptive Controllers Based on Frequency Response Techniques

Research output: Contribution to journalArticlepeer-review


This paper describes several adaptive techniques based on frequency response analysis, which are used in industrial controllers. Automatic tuning is used to obtain PID controller parameters, to build up gain schedules, and to initialize adaptive algorithms. A simple adaptive feedback algorithm which is based on the idea of tracking a point on the Nyquist curve is presented as well as an adaptive feedforward procedure. The adaptive techniques have been implemented in various industrial products. Industrial experiences from using the controllers are summarized in the paper.
Original languageEnglish
Pages (from-to)599-609
Issue number4
Publication statusPublished - 1991

Subject classification (UKÄ)

  • Control Engineering


  • Adaptive control
  • automatic tuning
  • feedforward control
  • frequency response
  • frequency domain
  • PID control
  • process control


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