Variable structure controllers for unstable processes

Ablay G.

JOURNAL OF PROCESS CONTROL, vol.32, pp.10-15, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32
  • Publication Date: 2015
  • Doi Number: 10.1016/j.jprocont.2015.04.017
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.10-15
  • Keywords: Variable structure systems, Process control, Sliding mode, Auto-tuning, PID control, Optimization, STRUCTURE PID-CONTROLLER, SLIDING MODE, DELAY SYSTEMS, DESIGN, MARGIN, GAIN, STABILIZATION, PERFORMANCE
  • Abdullah Gül University Affiliated: Yes


A variable structure control (VSC) method for unstable industrial processes is proposed. The proposed control method is able to provide a highly satisfactory system performance and to tackle with robustness issues of the processes in the presence of uncertainties. An ITAE-based numerical tuning algorithm for acquiring optimal control parameters, and a direct auto-tuning mechanism for the proposed controller are also provided. The performance of the proposed VSC method is illustrated on some unstable process models including a continuous stirred tank reactor (CSTR), in order to show its effectiveness, validity and feasibility. (C) 2015 Elsevier Ltd. All rights reserved.