LPV模型的非线性PID控制算法  

Nonlinear PID Control Algorithm for LPVModels

作　　者：黄江茵 

机构地区：[1]厦门理工学院电气工程与自动化学院,福建厦门361024

出　　处：《厦门理工学院学报》2015年第3期36-40,共5页Journal of Xiamen University of Technology

基　　金：厦门理工学院高层次人才项目(YKJ13012R);厦门理工学院国家自然科学基金预研项目(XYK201402);厦门理工学院对外科技合作与交流项目(E201400900)

摘　　要：以LPV模型为被控对象,提出一种适合动态系统、整定简便的非线性PID控制算法。针对LPV模型时变非线性运行特性,引入工作点变量,采用传统Ziegler-Nichols法整定被控对象在工作点处的局部PID控制参数,通过高斯插值使控制参数在系统操作轨迹上的平滑过渡,有效避免控制参数突变对系统的冲击以及被控模型改变引起的误差,实现了对被控非线性对象的高效稳定控制.Using linear parameter varying （LPV） model as a controlled object, an easy-tuning nonlinear PID control algorithm adapting to dynamic systems is proposed. Based on the time varying nonlinear operating characteristic of LPV model, the concept of working point variable is introduced. The local linear PID parameters at steady states were tuned using the conventional Ziegler-Nichols method, and the nonlinear PID parameters interpolated using Gaussian function along the whole operating trajectory. The proposed method can effectively avoid the impact from control parameters＇ mutation and the errors from changing controlled model. The simulation nonlinear process is well controlled with respect to efficiency and stability by the nonlinear PID control algorithm we proposed.

关 键 词：LPV模型 非线性PID控制 高斯插值 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]