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为了解决CD-R盘片测试仪中,对未记录CD-R盘的高精度主轴恒线速控制问题,提出了一种基于数字P ID(比例积分微分)和锁相环的二级高精度主轴恒线速控制方法。该方法用从CD-R盘上读取的摆动时钟信号作为控制反馈量,结合了数字P ID的快速性和锁相环的高精度,使用数字P ID控制光盘主轴电机快速接近一倍恒线速,之后切入锁相环实现高精度恒线速控制。对二级高精度主轴恒线速控制方法进行了研究,合理选择了控制参数。仿真和实验结果表明,系统调整时间优于0.2 s,控制精度优于0.03%,完全可以满足CD-R盘片测试仪的需要。
In order to solve the problem of constant linear speed control of high-precision spindle without recording CD-R disc in CD-R disc tester, a two-stage high-precision Spindle constant speed control method. This method uses the wobble clock signal read from the CD-R disk as the feedback amount of control, which combines the rapidity of the digital P ID and the high precision of the phase-locked loop. The digital P ID is used to control the spindle motor of the optical disk to quickly approach the constant line Speed, then cut into the phase-locked loop to achieve high-precision constant speed control. The control method of two-stage high-precision spindle constant linear velocity was studied, and the control parameters were reasonably selected. Simulation and experimental results show that the system adjustment time is better than 0.2 s, the control accuracy is better than 0.03%, which can fully meet the needs of CD-R disc tester.