采用Butterworth传递函数设计二自由度纯滞后控制系统

Design of Two-degree-of-freedom Control System with Time Delay Using Butterworth Transfer Function

采用Butterworth传递函数设计了纯滞后对象的状态反馈控制系统,针对纯滞后对象的状态反馈控制系统是单自由度的,提出一种采用Butterworth传递函数设计二自由度纯滞后控制系统的方法。用m阶模型逼近纯滞后因子,引入状态观测器,构成状态反馈子系统,再串入一个积分器,构成纯滞后过程的串级状态反馈控制系统,以n+1阶Butterworth传递函数为整个系统的目标函数,按状态反馈增益阵和状态观测器的协调优化设计状态反馈子系统。仿真结果表明了该方法设计的系统同时获得良好的给定值跟踪特性和干扰抑制特性。

A pure time delay state feedback control system was designed by using Butterworth transfer function.As pure time delay state feedback control system is a single-degree-of-freedom,a Butterworth transfer function was used to design two-degrees-of-freedom time delay control systems.The m-order model was used to approximate pure delay factor,state observer was employed to constitute a state feedback subsystem,and then an integrator was imported to constitute a pure time delay process cascade state feedback control system.Took the n＋1-order Butterworth transfer function as objective function of the whole system,the subsystem was designed in terms of method coordinating work state between observer and controller.The simulation results show that the designed system can trace the set-value and suppress the interference simultaneously.