DVD聚焦系统鲁棒复合控制器设计

Design of a Robust Compound Controller for DVD Focus System

在DVD聚焦伺服系统中,光盘翘曲会导致产生与光盘转动频率相同的周期性扰动.运用正反馈和负反馈相结合的复合控制器,可以有效抑制扰动.但是,正反馈对闭环系统稳定性有很大影响,所以给出一个具有鲁棒性的复合控制器.仿真和实验都证明了该控制器的有效性.

In DVD focus servo system, the warp of the disc induces periodic disturbance whose frequency is same as the rotation frequency of the disc. A compound controller which combines positive feedback and negative feedback gives an excellent advantage of disturbance rejection. But, the positive feedback affects the stability of the closed system a lot, so a robust compound controller is given. Its effectiveness is verified through simulations and experiments.