%0 Journal Article
%T A new practical method for closed-loop identification with PI control<br>一种新的实用PI控制闭环辨识方法
%A ZHU Xue-feng
%A XIAO Shu-jun
%A WANG Xiu
%A <br>朱学峰
%A 肖术骏
%A 王秀
%J 控制理论与应用
%D 2010
%I 
%X For a closed-loop system with a PI controller, we propose a method to identify the transfer function of the controlled object. From the under-damped-response of the closed-loop system, we approximate the closed-loop system by a second-order-plus-dead-time(SOPDT) transfer function. The transfer function of the PI controller is then removed from the approximate closed-loop transfer function. From the remaining transfer function, the open-loop transfer function of the controlled object is determined through a coefficient-comparison process. Both the simulations and the control experiments on a pilot-equipment show advantages of the proposed method, such as the high identification-accuracy, the low computational complexity and the easy online implementation, thus demonstrating its application potential.
%K closed-loop identification
%K proportional-integral control
%K second-order-plus-dead-time
%K coefficient-comparison<br>闭环辨识
%K PI控制
%K 二阶加时滞
%K 比较系数法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=970898A57DFC021F93AB51667BAED7F7&aid=A73C400E127FF068399964A9F436D8CC&yid=140ECF96957D60B2&vid=DB817633AA4F79B9&iid=9CF7A0430CBB2DFD&sid=4B24DA4DB6EBAD78&eid=3559FBE006544B4B&journal_id=1000-8152&journal_name=控制理论与应用&referenced_num=0&reference_num=13