零幅相误差跟踪控制器

Zero amplitude and phase error tracking controller

非最小相位系统的不稳定零点给前馈控制器的设计带来了很大的困难。零相位误差跟踪控制器 (ZPETC)的提出部分地解决了这一问题。为了进一步提高跟踪精度 ,减小幅值误差 ,提出了调幅滤波器 ,与 ZPETC串联构成零幅相误差跟踪控制器。理论上可以实现理想跟踪控制 ,即输出可以完全复现输入信号。仿真结果表明 。

The unstable zeros of a non minimum phase system are difficult problems for feedforward controller design. A Zero Phase Error Tracking Controller (ZPETC) was used to partially solve the problem. In order to increase the tracking accuracy and reduce the amplitude tracking error, an amplitude adjusting filter was developed, which together with a ZPETC provides a Zero Amplitude and Phase Error Tracking Controller. Perfect tracking control was obtained theoretically. Simulation results indicate that an input square wave can be tracked precisely using this feedforward controller.