Guaranteed Dominant Pole Placement with Discrete-PID Controllers: A Modified Nyquist Plot Approach

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• 作者：Emre Dincel^* ; ^{dincele@itu.edu.tr" class="auth_mail" title="E-mail the corresponding author} ; Mehmet Turan Sö ; ylemez^** ; ^{soylemezm@itu.edu.tr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Process Control ; Discrete-Time Control ; Pole Placement ; PID Controllers ; Nyquist Plot
• 刊名：IFAC-PapersOnLine
• 出版年：2014
• 出版时间：2014
• 年：2014
• 卷：47
• 期：3
• 页码：3122-3127
• 全文大小：803 K

文摘

Guaranteed dominant pole placement problem has already been considered in the literature (Journal of Process Control 19(2009):349–352). For the systems that are higher-order or have dead-time, pole placement procedure with PID controllers via modified Nyquist plot and root-locus has been proposed. Based on this idea, the dominant pole placement problem with discrete-PID controllers in z-domain is studied since it is important to take advantage of discrete-time domain representation during the pole placement procedure for time-delay systems. It is shown that modified Nyquist plot method is still valid in discrete-time domain and it is possible to find relevant discrete-PID controller parameters. Controller zeros are also considered in the study, since in the closed-loop controller zeros can disrupt the dominance. Success of the method demonstrated on example transfer functions.