基于频域的PI控制器整定方法研究及仿真  

Study and Simulation for Frequency Domain Approach to Tuning PI Controller

作　　者：闫秀英[1] 孟庆龙[2] 任庆昌[1] 

机构地区：[1]西安建筑科技大学信息与控制工程学院 [2]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《系统仿真学报》2007年第16期3775-3778,共4页Journal of System Simulation

基　　金：陕西省自然科学基金(2003F36);西安建筑科技大学青年科技基金(QN0627)

摘　　要：提出了一种基于频域的PI控制器参数整定方法。以典型的一阶惯性加滞后系统为被控对象,综合考虑系统设定值响应和扰动响应,以ISE为性能指标,结合求解幅值裕度和相位裕度的简化公式,利用Nelder-Mead单纯形优化方法搜索给定幅值裕度下的最优相位裕度,整定PI控制器参数;通过与几种整定方法对比,验证了该整定方法使得制系统具有良好的控制效果和较强的鲁棒性;对中央空调系统中几种高阶系统模型进行简化,利用该整定方法进行仿真试验,进一步验证该方法的可行性。Simple tuning method based on frequency domain for the design of PI controllers was given. Given reasonable gain margin （ GM）, response of setting point and load disturbance for the first order plus dead-time process were considered integrated to search optimal phase margin （PM） and tune PI parameters under ISE （Integral Square Error） performance index. The simplified formulas for solving GM and PM were adopted. Compared with several tuning formulas, the method was validated to give controlled system better performance and stronger robust, Several higher order models in central air conditioning system were simplified in the least-squares sense to further validate the feasibility of the present method

关 键 词：幅值裕度 相位裕度 PI控制器 参数整定 鲁棒性 积分平方误差 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]