文章基本信息

标题：A Modified IMC Structure to Independently Select Phase Margin and Gain Cross-over Frequency Criteria
本地全文：下载
作者：Pushkar Prakash Arya ; Sohom Chakrabarty
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2018
卷号：51
期号：1
页码：267-272
DOI：10.1016/j.ifacol.2018.05.066
语种：English
出版社：Elsevier
摘要：AbstractIn this paper, a modified internal model control (IMC) is proposed to improve transient response by introducing an additional PD controller in the control loop of a first order plus time delay (FOPTD) system. The controller is tuned to satisfy phase margin (φm) and gain cross-over frequency (ωg) independently. In the proposed methodology, φmand ωgcan be selected from a ωg- φmplane whereas basic IMC gives freedom to select φmand ωgfrom a ωg-φmline. Therefore, it improves the freedom for selection of these specifications by broadening the domain of selection from a line to a plane, also improving the overall response. Further the impact of the proposed controller is verified by considering transient parameters such as rise time (Tr), settling time (Ts) and maximum overshoot (%Mp) and the controller effectiveness is measured in terms of performance indices like integral square error (ISE), integral absolute error (IAE) and integral of the time weighted absolute error (ITAE).
关键词：KeywordsInternal model controlphase margingain cross-over frequencyfirst order plus time delay