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Indexed by:期刊论文

Date of Publication:2016-06-01

Journal:IEEE TRANSACTIONS ON CYBERNETICS

Included Journals:SCIE、EI、Scopus

Volume:46

Issue:6

Page Number:1301-1310

ISSN No.:2168-2267

Key Words:Absolutely exponential stability; delay-dependent switching techniques; temperature control for gas chromatograph

Abstract:This paper provides a design strategy for temperature control of the gas chromatograph. Usually gas chromatograph is modeled by a simple first order system with a time-delay, and a proportion integration (PI) controller is widely used to regulate the output of the gas chromatograph to the desired temperature. As the characteristics of the gas chromatograph varies at the different temperature range, the single-model based PI controller cannot work well when output temperature varies from one range to another. Moreover, the presence of various disturbance will further deteriorate the performance. In order to improve the accuracy of the temperature control, multiple models are used at the different temperature ranges. With a PI controller designed for each model accordingly, a delay-dependent switching control scheme using the dwell time technique is proposed to ensure the absolute exponential stability of the closed loop. Experiment results demonstrate the effectiveness of the proposed switching technique.