Title: A new PID_F controller structure for delayed process

Authors: Bharat Verma; Prabin Kumar Padhy

Addresses: PDPM-India Institute of Information Technology, Design and Manufacturing, Jabalpur, Madhya Pradesh, India ' PDPM-India Institute of Information Technology, Design and Manufacturing, Jabalpur, Madhya Pradesh, India

Abstract: A new proportional-integral-derivative (PID) control structure (PID_F) for delayed processes is proposed in this paper. It consists of a derivative controller (D) in feedback with a standard proportional-integral (PI) controller. The proposed PID_F controller improves the robustness with respect to time delay and de-noising capability. The proposed controller is similar to a PI controller with a low pass filter in series, which minimises the effect of high-frequency measurement noise. The robustness of the proposed PID_F controller, with respect to the process-delay variation, is verified through simulation of four different processes and results are compared with standard PID controller. The parameters of PID and PID_F controller are tuned by minimising the integral time square error (ITSE) objective function with the help of genetic algorithm.

Keywords: robust control; linear control; dominant pole; PID controller; PID_F controller; delayed process.

DOI: 10.1504/IJSCC.2019.098974

International Journal of Systems, Control and Communications, 2019 Vol.10 No.2, pp.81 - 94

Received: 19 May 2017
Accepted: 08 Sep 2018
Published online: 10 Apr 2019 *

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