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前言目前国外磁盘存贮器中定位器的位置传感器多数采用较为先进的“伺服盘”方案。所谓同服盘方案,是在磁盘组中有一片盘用作伺服控制,其上有一个专用磁头用来检测位置。实际上。用作伺服控制的盘片上予先录制“位置信号”,由专用磁头进行读取。读出的信号经过处理就得到了位置信号,用它来控制磁头的精确定位,同时用它来产生寻道控制的道脉冲。这个用作伺服控制的盘片称为“伺服盘”,这个专用的磁头称为“伺服磁头”。处理后的位置信号,它与偏离磁道中心的距离成正比、极性反映了偏离磁道中心的方向。采用“伺服盘”方案适应了高精度磁头定位系统的要求,它比以往采用的同步感应器、
Preface At present, most of the position sensors in disk storage in foreign countries adopt the more advanced “servo disk” scheme. The so-called service disk program, there is a disk in the disk group for servo control, which has a dedicated head to detect the location. In fact. Used as servo control pre-recorded on the disc “position signal”, read by a dedicated head. The read signal is processed to obtain the position signal, which is used to control the precise positioning of the head, and at the same time, it is used to generate the channel of tracking control. This servo-controlled disk is called a “servo disk” and this dedicated head is called a “servo head.” The processed position signal is proportional to the distance from the track center and the polarity reflects the direction away from the track center. The use of “servo drive” program to adapt to the requirements of high-precision magnetic head positioning system, it uses more than the previous synchronous sensor,