期刊
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
卷 40, 期 2, 页码 145-163出版社
SOC CHEMICAL ENG JAPAN
DOI: 10.1252/jcej.40.145
关键词
unstable processes; time delay; PID control; IMC; nonlinear control
In this paper, several linear PID control methods for unstable processes with time delays, which have recently been reported in the literature, are studied in terms of a comprehensive set of control performance specifications. Their applicability and achievable performance are indicated with regard to different cases of normalized time delay for ease of user's choice of the methods. By analyzing these methods' pros and cons, a modified method which combines their respective strengths using simple linear time-ariant and nonlinear control strategies is obtained and demonstrated with performance enhancement.
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