Guaranteed dominant pole placement with discrete-pid controllers: A modified nyquist plot approach

Dincel E., Söylemez M. T.

19th IFAC World Congress on International Federation of Automatic Control, IFAC 2014, Cape-Town, Güney Afrika, 24 - 29 Ağustos 2014, cilt.19, ss.3122-3127 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 19
  • Doi Numarası: 10.3182/20140824-6-za-1003.02442
  • Basıldığı Şehir: Cape-Town
  • Basıldığı Ülke: Güney Afrika
  • Sayfa Sayıları: ss.3122-3127
  • Anahtar Kelimeler: Discrete-time control, Nyquist plot, PID controllers, Pole placement, Process control
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

© IFAC.Guaranteed dominant pole placement problem has already been considered in the literature (Journal of Process Control 19(2009):349-352). For the systems that are higher-order or have dead-time, pole placement procedure with PID controllers via modified Nyquist plot and root-locus has been proposed. Based on this idea, the dominant pole placement problem with discrete-PID controllers in zdomain is studied since it is important to take advantage of discrete-time domain representation during the pole placement procedure for time-delay systems. It is shown that modified Nyquist plot method is still valid in discrete-time domain and it is possible to find relevant discrete-PID controller parameters. Controller zeros are also considered in the study, since in the closed-loop controller zeros can disrupt the dominance. Success of the method demonstrated on example transfer functions.