
基本信息:
- 专利标题: Spacing Fluctuation Compensation
- 专利标题(中):间距波动补偿
- 申请号:US13424640 申请日:2012-03-20
- 公开(公告)号:US20130250446A1 公开(公告)日:2013-09-26
- 发明人: Qinghua Zeng , Ellis Cha
- 申请人: Qinghua Zeng , Ellis Cha
- 申请人地址: US CA Milpitas HK Shatin
- 专利权人: HEADWAY TECHNOLOGIES, INC.,SAE MAGNETICS (HK) LTD.
- 当前专利权人: HEADWAY TECHNOLOGIES, INC.,SAE MAGNETICS (HK) LTD.
- 当前专利权人地址: US CA Milpitas HK Shatin
- 主分类号: G11B21/12
- IPC分类号: G11B21/12 ; G11B5/09
摘要:
A method to compensate for spacing variations between a dynamic fly height (DFH) controlled read/write head and a rotating disk surface. Using a HDI sensor or equivalent indicator of touchdowns, a power profile is calculated for an arbitrary track on a disk. The profile tracks disk topography by recording touchdown power at each of a series of sectors into which the track is subdivided. The resulting power profile, smoothed and expressed as a function of sector position, substitutes for the usual constant TD power setting that provides only an uncompensated range of spacing variations. A fixed back-off spacing power is added to the power profile enabling the head to fly over the track at a constant spacing. The power profile can be calculated to account for various temperature and pressure conditions.
摘要(中):
一种用于补偿动态飞行高度(DFH)控制的读/写头和旋转盘表面之间的间距变化的方法。 使用HDI传感器或触地得分的等效指示符,计算磁盘上任意轨道的功率曲线。 轮廓通过在轨道被细分的一系列扇区中的每一个记录触地功率来跟踪盘形地形。 所得到的功率曲线,平滑并且表示为扇区位置的函数,代替通常的恒定TD功率设置,其仅提供无补偿的间隔变化范围。 固定的后退间距功率被添加到功率轮廓中,使得头以恒定的间距飞越轨道。 功率曲线可以计算出各种温度和压力条件。
公开/授权文献:
- US08767339B2 Spacing fluctuation compensation 公开/授权日:2014-07-01
IPC结构图谱:
G | 物理 |
--G11 | 信息存储 |
----G11B | 基于记录载体和换能器之间的相对运动而实现的信息存储 |
------G11B21/00 | 并非专指记录或重现方法的换能头装置 |
--------G11B21/02 | .换能头的驱动或移动 |
----------G11B21/12 | ..上升或下降;沿磁迹向后调距或向前调距,返回到开始位置 |