Title: Experimental evaluation of various modified Smith predictor-based fractional order control design strategies in control of a thermal process with time delay

Authors: Necdet Sinan Özbek; İlyas Eker

Addresses: Department of Electrical and Electronics Engineering, Adana Science and Technology University, 01180, Adana, Turkey; Department of Electrical and Electronics Engineering, Çukurova University, Adana, Turkey ' Department of Electrical and Electronics Engineering, Çukurova University, 01130 Adana, Turkey

Abstract: In this study, a number of modified Smith predictor (SP)-based fractional order control strategies are investigated experimentally on a thermal process. Controller design methods and tuning strategies are elaborated step by step. Further, control strategies are discussed in relation to design specifications, control cost, implementation issues, and operating modes encountered in practice. Performance comparison is presented via several illustrations and numerical measures. Particular attention is paid to the tracking precision, quality of the control signal, robustness against disturbances and energy efficiency. Complementary comments are addressed based on merits and demerits of the each control technique.

Keywords: time delay systems; Smith predictor; fractional order control; fuzzy logic; delay effect; thermal process; system identification; experimental application.

DOI: 10.1504/IJES.2019.097572

International Journal of Embedded Systems, 2019 Vol.11 No.1, pp.68 - 77

Received: 03 Mar 2017
Accepted: 12 Jul 2017
Published online: 29 Jan 2019 *

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