An extremum seeking approach to parameterised loop-shaping control design

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• 作者：Chih Feng Lee^* ; ^{chih.feng.lee@liu.se" class="auth_mail" title="E-mail the corresponding author} ; Sei Zhen Khong^** ; ^{seizhen@control.lth.se" class="auth_mail" title="E-mail the corresponding author} ; Erik Frisk^* ; ^{frisk@isy.liu.se" class="auth_mail" title="E-mail the corresponding author} ; Mattias Krysander^* ; ^{matkr@isy.liu.se" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Global extremum seeking ; loop-shaping ; parameterised controller ; frequency response estimation
• 刊名：IFAC-PapersOnLine
• 出版年：2014
• 出版时间：2014
• 年：2014
• 卷：47
• 期：3
• 页码：10251-10256
• 全文大小：429 K

文摘

An approach to loop-shaping feedback control design in the frequency domain via extremum seeking is proposed. Both plants and controllers are linear time-invariant systems of possibly infinite dimension. The controller is assumed to be dependent on a finite number of parameters. Discrete-time global extremum seeking algorithms are employed to minimise the difference between the desired loop shape and the estimate of the present loop shape by fine-tuning the controller parameters within a sampled-data framework. The sampling period plays an important role in guaranteeing global practical convergence to the optimum. A case study on PID control tuning is presented to demonstrate the applicability of the proposed method.