一种新的基于相位裕度PID参数最优整定方法  

New Optimization Tuning Method of PID Parameters Based on Phase Margin

作　　者：张志强[1] 邵惠鹤[1] 

机构地区：[1]上海交通大学自动化系,上海200030

出　　处：《上海交通大学学报》2000年第5期623-625,634,共4页Journal of Shanghai Jiaotong University

摘　　要：提出了一种 PID参数最优整定方法 ,两次采用线搜索分别整定出 Kp 和 Ti、Td.根据相位裕度的概念推导出的参数整定公式与基于几何图形推导出的参数整定公式一致 ,但更容易理解 .为了消除一个多余的自由度 ,规定 Ti 与 Td 间成比例关系 ,并通过参数寻优来寻找 Ti 与 Td 间的最佳比例系数 .与其他最优整定方法相比 ,该方法有一个突出的特点 ,它不需要建立被控对象的数学模型 ,几乎无需任何有关被控对象的先验知识 .Based on the formula derived from the concept of phase margin,a new optimization tuning method of PID parameters was proposed.Itfound outthe best value of Kp and Ti、Tdby using twice linear search,respectively.The formula derived in this paper are consistent with those in CHEN's paper where they are derived based on geometric graph,while the former are easy to comprehend.In this paper, CHEN's method was used and the best proportion between Tiand Td was found by the search.Compared with the other optimization tuning methods,this one has an outstanding character,it doesn't need the mathematical model of the object and almost need little prior knowledge of the object.The simulation re- sults show that this method is effective.

关 键 词：PID控制 最优化 相位裕度 PID参数 最优整定方法 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]