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Title: A new analytical approach for phase-margin specification-based target-loop selection for different class of dead-time processes

Authors: Sudipta Chakraborty

Addresses: Department of Electronics and Instrumentation Enginering, National Institute of Technology, Silchar, Assam, India

Abstract: Target-loop based controller design is one of the most utilised strategies in industry. For such designs, selection of the proper target-loop is the most important task. In this paper, an analytical approach for selection of target-loop for different classes of processes have been presented. Explicit formulas for the target-loop selection have been derived with phase margin specifications. To validate the proposed target-loop, case studies on various process models have been made. Lastly, to check the applicability and superiority, a control comparison with proposed loop based controller and a recently developed one is also included.

Keywords: time-delay; target-loop; phase-margin; robustness; maximum sensitivity; loop-shaping-based controller design; PID control; loop-shaping.

DOI: 10.1504/IJAAC.2022.119424

International Journal of Automation and Control, 2022 Vol.16 No.1, pp.125 - 135

Received: 24 Jan 2020
Accepted: 28 Jun 2020

Published online: 03 Dec 2021 *

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