一、前言由于在大容量磁盘存储器中采用每道一磁头在技术上有困难和成本上不合算,因此采用了取数机构,将磁头定位在某一磁道上,然后进行读和写。近来,由于磁头和记录介质等性能提高了,存储容量显著增加,从提高数据处理能力来看缩短取数时间也成了一个重要课题。目前,取数机构基本上都采用音圈电机作驱动源。要缩短取数时间,必须加大力。由此带来了尺寸加大和消耗功率增加的问题。因此在设计磁盘机的时候,必须根据使用要求(平 I. INTRODUCTION Since it is technically difficult and cost-effective to use one head per head in a large-capacity disk storage, a data acquisition mechanism is used to position the head on a track and then read and write. Recently, as the performance of magnetic heads and recording media has increased and the storage capacity has remarkably increased, it has become an important issue to shorten the fetch time in terms of improving the data processing capability. Currently, the number of institutions are basically using voice coil motor as the driving source. To shorten the time taken, we must increase their efforts. This brings about the problem of increased size and increased power consumption. Therefore, the design of the disk drive, it must be based on the use of requirements (flat