摘要
提出一种基于灵敏度鲁棒性指标的自适应PID控制器.通过对控制回路正常运行操作中产生的输入和输出信号的分解和拉普拉斯变换,辨识出过程对象在重要频率范围内的频率响应特性.在此基础上用最小二乘法从幅值和相位两方面去拟合一个二阶加纯滞后传递函数,获得过程对象模型,计算出满足灵敏度指标的PID控制器参数.PID控制器的自适应过程既不需要过程对象和控制器的任何先验知识,也不用中断控制回路的正常运行.仿真实验表明了自适应控制器的有效性和可行性.
This paper presents a new adaptive PID controller with sensitivity specification. On the basis of process input and output data of normal operation in the control loop, important frequency responses of the process are estimated with signal decomposition and Laplace transform. A second-order and dead-time transform function is identified. PID control parameters are calculated to satisfy the sensitivity specification. The adaptive procedure of PID controller does not need any prior knowledge of the process and the previous controller. Simulation results are given to show effectiveness and feasibility of the adaptive PID controller.
出处
《应用科学学报》
CAS
CSCD
北大核心
2009年第3期305-310,共6页
Journal of Applied Sciences
基金
上海市自然科学基金(No.08ZR1415500)
上海市科委重点攻关计划基金(No.072305126)资助项目
关键词
自适应控制
频率特性
灵敏度
PID控制器
adaptive control, frequency response, sensitivity, PID controller
