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本文是在小型、轻量、高刚性磁盘磁头定位机构上作的高速,高精度跟踪控制的试验总结。结论如下: 1)通过程序来设计音圈电机,使设计大为简化。 2)设计平均访问时间为15ms,运动部分质量300g的定位机构,大体上得到了予定的性能。 3)明确了抑制驱动马达用功放的瞬时功率损耗以及缩短减速时间的驱动方法的设计步骤。 4)求出了由寻道控制转向跟踪控制的转换条件,及缩短稳定时间的临界剩余速度。 5)应用概率论的最佳跟踪控制理论,给出了获得高精度跟踪控制的设计步骤。
This article is a small, lightweight, high-rigidity magnetic head positioning mechanism for high-speed, high-precision tracking control test summary. The conclusions are as follows: 1) Through the program to design voice coil motor, the design is greatly simplified. 2) The design of the average access time of 15ms, the movement part of the quality of 300g positioning mechanism, in general, has been given a predetermined performance. 3) The design procedure of the driving method for suppressing the instantaneous power loss of the power amplifier for the driving motor and shortening the deceleration time is clarified. 4) Determine the transition conditions from seek control to tracking control, and reduce the critical residual speed of stable time. 5) Applying the theory of optimal tracking control of probability theory, we give the design steps to obtain high precision tracking control.