Title: A fuzzy-PID controller with adjustable factor based on S7-300 PLC

Authors: Xingqiao Liu, Jiao Geng, Shaoqing Teng, Chengchun Li

Addresses: School of Electrical and Information Engineering, Jiangsu University, ZhenJiang, Jiangsu, 212013, China. ' School of Electrical and Information Engineering, Jiangsu University, ZhenJiang, Jiangsu, 212013, China. ' School of Electrical and Information Engineering, Jiangsu University, ZhenJiang, Jiangsu, 212013, China. ' School of Electrical and Information Engineering, Jiangsu University, ZhenJiang, Jiangsu, 212013, China

Abstract: A fuzzy-PID controller with adjustable factor is designed in this paper. Scale factor|s self-adjust will come true. Fuzzy control algorithm is finished in Step7 software and then downloaded in S7-300 PLC. WinCC software will be used to control the change-trend in real time. Data communication between S7-300 PLC and WinCC is achieved by MPI. The research shows that this fuzzy-PID controller has better robust capability and stability. It|s an effective method in controlling complex long time-varying delay systems.

Keywords: fuzzy PID control; fuzzy control; adjustable factor; temperature control; MPI; S7-300 PLC; modelling; identification; data communication; time-varying delay systems; programmable controllers.

DOI: 10.1504/IJMIC.2009.027891

International Journal of Modelling, Identification and Control, 2009 Vol.7 No.4, pp.371 - 375

Published online: 14 Aug 2009 *

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