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Stabilization judgment method for positioning control device, positioning control device and disk apparatus

一种定位控制、稳定的技术，应用在跟踪查找/对齐、数字记录/再现、仪器等方向，能够解决定位精度困难、不能检测残余振动、短稳定判断时间等问题，达到实现定位精度、高速且准确判断稳定、改进高速判断的效果

Inactive Publication Date: 2007-10-03
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if the judgment time is too short, the residual vibration after seek cannot be detected, and the positioning accuracy may drop after the stabilization ends
[0008] Because of the demand for large capacity and higher speed in disk devices recently, stable judgment conditions are critical for safety and for high-speed processing of data, but in terms of prior art, it is necessary to realize short stable judgment time and good positioning precision is difficult

Method used

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  • Stabilization judgment method for positioning control device, positioning control device and disk apparatus
  • Stabilization judgment method for positioning control device, positioning control device and disk apparatus
  • Stabilization judgment method for positioning control device, positioning control device and disk apparatus

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Embodiment Construction

[0045] Hereinafter, embodiments of the present invention will be described in the order of the configuration of the disk device, the setting of stability determination conditions, other positioning control means, and other embodiments, but the present invention is not limited to these embodiments.

[0046] Disk device structure

[0047] 1 is a block diagram depicting a disk device according to an embodiment of the present invention, FIG. 2 is a diagram depicting the arrangement of position signals and tracks of the magnetic disk in FIG. 1, and FIG. 3 is a diagram depicting position signals of the magnetic disk in FIGS. 1 and 2. 4 is a block diagram depicting the operating head position control system in FIG. 1 , and FIG. 5 is a diagram depicting the operating head position control in FIGS. 1 and 4 .

[0048] FIG. 1 shows a magnetic disk device as an example of the disk device. As shown in FIG. 1 , a magnetic disk 4 as a magnetic storage medium is mounted at the rotating shaft...

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Abstract

A settling judgment method judges whether an object is settled at a target position by using a settlement judgment formula set a slice value and number of continuous samples. The slice and number of continuous judgments of the judgment value of the settling judgment are judged by the slice value and number of samples which are set such that the maximum value of a maximum amplitude ratio (Rate), for each frequency of cyclic disturbance (Y), determined from the maximum amplitude values (Max1, Max2) of the judgment values when the cyclic disturbance is applied is contained within a predetermined position accuracy. Settlings can be judged at high-speed and accurately according to the settling judgment formula, and both an improvement of positioning accuracy and high-speed judgment can be implemented.

Description

technical field [0001] The present invention relates to a settling judging method for judging whether an object is stabilized at a target position in a positioning control device for moving an object to a target position by an actuator, a positioning control device, and a disk device , or following, and more specifically, the present invention relates to a stability determination method for a positioning control device to reduce the stability determination time and accurately determine stability, a positioning control device, and a disk device. Background technique [0002] Positioning controls for moving objects to target positions are widely used. For such a positioning control device, for example, high-precision positioning is required when used for a disk device. Specifically, in a magnetic disk device or an optical disk device, it is extremely important to accurately position a head to a target track in order to increase recording density. The stability judgment is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B21/10G11B25/04
CPCG11B5/556G11B5/5547G11B5/5582G11B5/59611G11B21/10G11B21/02G11B20/10
Inventor 高石和彦
Owner FUJITSU LTD