改进的内模控制方法对一阶非自衡对象的控制研究

针对传统的内模控制方法在非自衡对象中应用的不足,提出一种改进的内模控制方法。该方法在传统的内模控制结构中添加了一个比例控制器和一个比例微分控制器,分别用于镇定不稳定对象和改善控制系统的抗干扰特性及鲁棒特性,并采用全极点近似法对被控对象的纯滞后项进行近似处理。改进的内模控制方法具有很好的目标跟踪特性和干扰抑制特性,各个控制器的设计简单,且整个控制系统只有一个调节参数。最后通过对一个一阶非自衡对象进行仿真,其结果说明了本文所提出的内模控制新方法的有效性。

Research of Control Method for First-order Integrator and Time Delay Process Based on Improved Internal Model Control

An improved internal model control method was proposed for integrator and time delay process to overcome the limitation of the traditional internal model control method.A proportional controller and a proportional differential controller were added to the traditional internal model control structure to stabilize unstable object and control the disturbance rejection performance and robustness of the system.All-pole approximation method was adopted to approximate the delay item of the system.The improved internal model control had fast set point response and good disturbance rejection performance.The design of each controller was simple,and there was only one parameter in the whole system.The simulation results of a first-order integrator and time delay process illustrates the effectiveness of the method.