Autors: Bucz,St., Kozakova,A., Vesely.V.
Title: SINE-WAVE TYPE ROBUST PID CONTROLLER DESIGN FOR SYSTEMS WITH UNSTABLE ZERO
Keywords: Gain margin, excitation signal, identification level, B-parabolas

Abstract: Non-minimum phase processes belong to the category of difficult-to-control plants.This paper deals with development of a new robust PID controller design method that guarantees maximum overshoot and settling time specified by the designer especially for non-minimum phase processes with unstable zero.The PID controller design provides guaranteed gain margin GM.The parameter of the tuning rules is a suitably chosen point of the plant frequency response obtained by a sine-wave signal with excitation frequency ωn.The designed controller then moves this point into the phase crossover with the required gain margin GM.The couple(ωn;GM) is specified with respect to engineering requirements on the closed-loop step response in terms of ηmax and ts according to parabolic dependences.The new approach has been verified on a vast batch of benchmark examples.The developed algorithm has been extended to robust PID controller design for processes with unstable zero and unstructured uncertainties.

References

    Issue

    INTERNATIONAL CONFERENCE AUTOMATICS’2012, vol. 2, pp. 211-220, 2012, Bulgaria,

    Вид: публикация в национален форум