| 引用本文: | 朱学峰,肖术骏,王秀.一种新的实用PI控制闭环辨识方法[J].控制理论与应用,2010,27(9):1240~1244.[点击复制] |
| ZHU Xue-feng,XIAO Shu-jun,WANG Xiu.A new practical method for closed-loop identification with PI control[J].Control Theory and Technology,2010,27(9):1240~1244.[点击复制] |
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| 一种新的实用PI控制闭环辨识方法 |
| A new practical method for closed-loop identification with PI control |
| 摘要点击 1687 全文点击 1802 投稿时间：2009-07-15 修订日期：2009-12-02 |
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| DOI编号 10.7641/j.issn.1000-8152.2010.9.CCTA090931 |
| 2010,27(9):1240-1244 |
| 中文关键词 闭环辨识 PI控制 二阶加时滞 比较系数法 |
| 英文关键词 closed-loop identification proportional-integral control second-order-plus-dead-time coefficient-comparison |
| 基金项目 2008佛山市禅城区产学研资助项目(2008B1034). |
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| 中文摘要 |
| 对于有PI控制器的闭环系统, 提出一种辨识方法, 可以在闭环系统运转下得到控制对象的开环传递函数. 首先, 根据闭环系统的衰减振荡曲线, 近似地求出闭环控制系统的二阶加时滞(SOPDT)闭环传递函数. 然后, 用方框图等效法, 在所得的闭环传递函数中将PI控制器分离出去; 再通过比较系数就得到对象的开环传递函数. 数字仿真和辨识实验表明此法有很好的辨识精度, 计算量小且非常易于在线实现, 具有比较重要的现实意义. |
| 英文摘要 |
| 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. |
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