Disturbance rejection performance analyses of closed loop control systems by reference to disturbance ratio

Alagoz B. B., DENİZ F. N., KELEŞ C., TAN N.

ISA TRANSACTIONS, cilt.55, ss.63-71, 2015 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 55
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.isatra.2014.09.013
  • Dergi Adı: ISA TRANSACTIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.63-71
  • Anahtar Kelimeler: Disturbance rejection control, Disturbance suppression, PID controllers, Fractional order PID controllers, Reference to disturbance ratio (RDR), HIGH-GAIN FEEDBACK, TIME-DELAY, INVARIANT SUBSPACES, DESIGN, DOMAIN
  • İnönü Üniversitesi Adresli: Evet

Özet

This study investigates disturbance rejection capacity of closed loop control systems by means of reference to disturbance ratio (RDR). The RDR analysis calculates the ratio of reference signal energy to disturbance signal energy at the system output and provides a quantitative evaluation of disturbance rejection performance of control systems on the bases of communication channel limitations. Essentially, RDR provides a straightforward analytical method for the comparison and improvement of implicit disturbance rejection capacity of closed loop control systems. Theoretical analyses demonstrate us that RDR of the negative feedback closed loop control systems are determined by energy spectral density of controller transfer function. In this manner, authors derived design criteria for specifications of disturbance rejection performances of PID and fractional order PID (FOPID) controller structures. RDR spectra are calculated for investigation of frequency dependence of disturbance rejection capacity and spectral RDR analyses are carried out for PID and FOPID controllers. For the validation of theoretical results, simulation examples are presented. (C) 2014 ISA. Published by Elsevier Ltd. All rights reserved.