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Data storage device attenuating thermal decay effect on fly height measurement
Data storage device attenuating thermal decay effect on fly height measurement
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机译：数据存储设备可减轻热衰减对飞行高度测量的影响
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摘要
A data storage device is disclosed comprising a head actuated over a disk. A first spacing pattern is written to the disk and a second spacing pattern is written to the disk different from the first spacing pattern. A first fly height measurement (FHM1_1) is generated by reading the first spacing pattern and a first fly height measurement (FHM2_1) is generated by reading the second spacing pattern. After an interval, a second fly height measurement (FHM1_2) is generated by reading the first spacing pattern and a second fly height measurement (FHM2_2) is generated by reading the second spacing pattern. A change in the fly height of the head is estimated based on:(ΔFHM2−B·ΔFHM1)/(A−B)where ΔFHM1 represents a difference between FHM1_1 and FHM1_2, ΔFHM2 represents a difference between FHM2_1 and FHM2_2, and A and B are constants.
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机译：公开了一种数据存储设备，其包括在磁盘上致动的头。与第一间隔图案不同的是，第一间隔图案被写入磁盘，第二间隔图案被写入磁盘。通过读取第一间隔图案来产生第一飞行高度测量值（FHM1_1），并且通过读取第二间隔图案来产生第一飞行高度测量值（FHM2_1）。在间隔之后，通过读取第一间隔图案来生成第二飞行高度测量值（FHM1_2），并且通过读取第二间隔图案来生成第二飞行高度测量值（FHM2_2）。根据以下内容估算杆头飞行高度的变化：<？in-line-formulae description =“在线公式” end =“ lead”？>（Δ FHM 2- B·ΔFHM 1）/（ AB ）<？in-line-formulae description =“ In-line Formulae” end =“ tail”？>其中ΔFHM1代表FHM1_1和FHM1_2之间的差，ΔFHM2代表FHM2_1和FHM2_2之间的差，并且A和B是常数。
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