变参数FOPDT型系统的强鲁棒自适应PI控制器设计  

Strong Robust Adaptive PI Controller Design of Parameter Varying FOPDT System

作　　者：邵辉[1] 胡伟石[2] 洪雪梅[1] 罗继亮[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021 [2]华侨大学实验室与设备管理处,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2017年第1期96-100,共5页Journal of Huaqiao University(Natural Science)

基　　金：福建省科技计划项目(2015H0026);第48批留学回国人员科研启动基金(Z1534004)

摘　　要：针对基于非线性模型控制器设计困难的问题,将非线性系统用变参数形式的一阶惯性加延迟(FOPDT)模型描述,并进行控制器设计,从而简化控制器的设计过程并提高控制性能.采用一种新型的自适应比例积分(PI)控制器结构,通过增益参数切换和积分复位实现高精度的设定点跟踪和扰动抑制性能.仿真及实验结果表明:文中方法使系统控制精度提高10倍,达到0.01°;超调量有所减少;模型变化时,阶跃响应和干扰抑制效果仍佳;与传统的PI方法比较,文中方法具有良好的动态、稳态响应性能和鲁棒性.Since the difficulties exit in designing controller for nonlinear models, the article describes first or-der plus dead-time （FOPDT） model with parameter varying for nonlinear systems, and proposes to design con-troller based on it, which simplifies controller designing processes and improves system performance. It is worthy to be mentioned that the article describes a special structure of adaptive proportional integral （PI） con-trol ,in which the set-point tracking with high accuracy and disturbance rejection performance are guaranteed by the forward gain switching and integrator reset. The simulation and experimental studies demonstrate that the accuracy of the system is improved to 10 times than before, reaching to 0. 01°, that the overshoot is de-creased, that the results of step response and disturbance rejection are still well when the system model is changed？ and that compared with the traditional PI regulator, the proposed method has good dynamic, steady state performance and robustness.

关 键 词：变参数-阶惯性加延迟模型 自适应比例积分 前项增益切换 积分复位 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]