基于灰色PID的DVD光学头控制与优化

Controlling and Optimizing of DVD optical head based on Grey PID

光学头控制精度直接影响高密度光盘系统(DVD)的存储性能,为了提高DVD光学头的控制精度,提出一种灰色PID的DVD光学头控制优化机制。针对DVD光学头读取机制建立传递函数,然后采用神经网络对DVD光学头的PID控制参数进行逼近和优化,并采用灰色理论模型对DVD光学头的控制输出误差进行预测,实现PID超前控制,最后采用Matlab 2012进行仿真测试。仿真结果证明,本文机制提高了DVD光学头的控制优化效率,降低了控制系统的超调量,提高了光学头控制精度,具有较高的应用价值。

In order to improve the storage performance of high density optical disk system （ DVD）, storage per- formance of the DVD is directly affected by the optical head control precision, in order to improve the control preci- sion, a DVD optical head control optimization mechanism based on a grey PID is proposed in this paper. First of all, transfer function of DVD head is established, and then PID control parameters of DVD optical head is optimized by u- sing neural network, and grey model is used to predict the output error to control PID in advance, lastly, simulation test is carried out in matlab 2012. The simulation results show that the proposed mechanism can improve optimization efficiency of DVD optical head control, reduce the overshoot of the system, and improve control precision and has high application value.