公开(公告)号：US4628379A

公开(公告)日：1986-12-09

申请号：US655355

申请日：1984-09-25

申请人： Thomas L. Andrews, Jr. ,  Thomas A. Fiers ,  Richard G. Laatt

发明人： Thomas L. Andrews, Jr. ,  Thomas A. Fiers ,  Richard G. Laatt

IPC分类号： G11B21/10 ,  G11B5/56

CPC分类号： G11B21/106

摘要： A method and apparatus are provided to compensate for the runout that commonly occurs during the reading from or writing of information on the surface of a disk medium using a read/write head. The runout relates to the distance the head is located away from a disk track center during the rotation of the disk. To maintain the head in alignment with the track center during the complete revolution of the disk, position information is obtained. This position information is used with discrete fourier transform techniques to provide a representation of the disk runout. From this representation, a compensating signal can be generated to provide movement of the head that compensates for the runout and keeps the head positioned in alignment with the track center at all times during the disk rotation.

摘要翻译： 提供了一种方法和装置，以补偿在使用读/写头读取或写入磁盘介质的表面上的信息时通常发生的跳动。 跳动与磁盘旋转期间磁头远离磁盘轨道中心的距离有关。 为了在磁盘完全旋转期间保持头部与轨道中心对准，获得位置信息。 该位置信息与离散傅立叶变换技术一起使用以提供磁盘跳动的表示。 从该表示可以产生补偿信号以提供头部的运动，其补偿跳动并且在磁盘旋转期间始终保持磁头与轨道中心对齐。

公开(公告)号：US4590526A

公开(公告)日：1986-05-20

申请号：US547308

申请日：1983-11-01

申请人： Richard G. Laatt ,  Thomas A. Fiers ,  Thomas L. Andrews, Jr.

发明人： Richard G. Laatt ,  Thomas A. Fiers ,  Thomas L. Andrews, Jr.

IPC分类号： G11B5/55

CPC分类号： G11B5/5547

摘要： A method and apparatus are provided in an embedded servo system for controllably moving, using a linear motor, a carriage assembly and one or more accompanying heads relative to one or more disk surfaces. Each disk surface includes sectors for reading and writing information. Each disk surface also includes servo fields spaced between the read/write sectors. The servo fields have preset servo or position information for each of the tracks on the disk. The position information is in the form of Normal and Quadrature generated signals used to determine the exact position of the head when it is located between track centers. Using the determined position of the head and knowing a target position on the disk surface, the distance remaining to the target position is found. Using the value of the distance remaining to the target position, a head velocity can be determined and the proper amount of current can be supplied to the linear motor so that the head arrives at the target position in minimal time.

摘要翻译： 在嵌入式伺服系统中提供了一种方法和装置，用于使用线性电动机，托架组件和相对于一个或多个盘表面的一个或多个相关头部可控地移动。 每个磁盘表面包括用于读取和写入信息的扇区。 每个磁盘表面还包括间隔在读/写扇区之间的伺服磁场。 伺服字段为磁盘上的每个磁道预设了伺服或位置信息。 位置信息采用正常和正交生成信号的形式，用于确定头部位于轨道中心之间时的确切位置。 使用确定的头部位置并且知道盘表面上的目标位置，找到剩余到目标位置的距离。 使用剩余到目标位置的距离的值，可以确定头部速度，并且可以向线性电动机提供适当的电流量，使得头部在最短时间内到达目标位置。