内模控制在前馈-反馈控制系统中的应用

Application of Internal Model Control in Feedforward-feedback Control System

利用内模控制的优点对前馈-反馈控制进行改进，将一阶纯滞后过程作为被控对象，对其中的时滞环节进行1／Pade逼近。根据内模控制器的设计原理，得到单位反馈PID控制器的参数整定值。Matlab仿真结果表明，经过内模控制优化后，该系统的抗干扰能力和稳定性得到了改善。

The paper introduces how the feedforward-feedback control system is improved by using the internal model control （IMC）, in which the first-order pure lag process is treated as controlled object, the time lag is carried on with l/Pade approximation. According to the design principle of internal model controller, the parameter settings of PID controller can be gained. The Matlab simulation result shows that the anti-disturbance ability and the stability of the system have been improved through the internal model control optimization.