A fuzzy PLC with gain-scheduling control resolution for a thermal process - a case study

被引：5

作者：

Li, HX ^{[1
]}

Tso, SK ^{[1
]}

机构：

[1] City Univ Hong Kong, Fac Sci & Technol, Ctr Intelligent Design Automat & Mfg, Tat Chee Ave, Kowloon, Peoples R China

来源：

CONTROL ENGINEERING PRACTICE | 1999年 / 7卷 / 04期

关键词：

fuzzy control; fuzzy-plc systems; gain scheduling; process control; fuzzy sets;

D O I：

10.1016/S0967-0661(99)00007-6

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents a case study on the practical implementation of a fuzzy-PLC system for a thermal process. The theoretical study indicates that the inferior performance of fuzzy-controlled processes around a reference point is often caused by insufficient resolution of the fuzzy inference. The limitations of ladder logic cannot support complex algorithms for resolution improvement. A simple gain adaptation method is presented here, to achieve smooth fuzzy control, that can be easily implemented in a PLC system. Real-time experiments on an unidentified thermal process show the effectiveness of the approach, as well as the robustness of the fuzzy controller with respect to the time-varying features of the process. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：523 / 529

页数：7

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