针对某发动机的大延迟控制通道,提出了一种基于前馈-反馈复合补偿的内模PID控制算法,该算法采用前馈的方式在被控量“未变化前”进行“超前补偿”,加大提前修正能力,从而提高系统的响应快速性,并减小稳态误差;采用内模控制的思想去整定PID参数,结构简单,在线调整参数少,调整容易,计算机仿真和地面试车结果证明了该方法的有效性。

In order to control a system with long time-delay of a certain turbofan engine, an internal model control algorithm based on composite feedback feedforward compensation was proposed. By this method, feedforward was used to compensate the controlled variables before changing and strengthening the system's correcting ability, which would accelerate the response speed and reduce the steady-state error; The thought of internal model control was applied to adjust the parameters of PID controller, and this could reduce the parameters needed to be adjusted online and make the parameters be easy to adjust. The simulations and the trial run test results showed the validity of the proposed method.