发明名称 |
SYSTEM AND METHOD FOR IDENTIFYING AND FILTERING A HEAD SUSPENSION ASSEMBLY RESONANCE FREQUENCY |
摘要 |
A method and apparatus for identifying and filtering a resonance frequency of a support structure supporting a read/write head in proximity with a data storage medium involves obtaining a particular sample of a position error signal (PES) frequency transform, preferably using Goertzel's algorithm. The velocity of the data storage medium is varied, and the magnitude of a particular PES frequency transform sample is computed at each of the velocities. A resonance frequency of the support structure is calculated using the velocity associated with the particular sample having a maximum magnitude. The effects of one or more resonance frequencies associated with a read/write head suspension may be canceled in a position error signal using one or more programmable filters provided in each servo loop. A processor programs the filters using the calculated resonance frequencies and adjusts to compensate for the additional lag introduced into the respective servo loops by the selected programmable filters. A method and apparatus for identifying one or more resonance frequencies of one or more read/write head support structures according to the principles of the present invention may be implemented in a data storage system and, preferably, implemented in-situ a data storage system without resort to circuitry external to the data storage system.
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申请公布号 |
CA2287443(A1) |
申请公布日期 |
2000.06.02 |
申请号 |
CA19992287443 |
申请日期 |
1999.10.26 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
OTTESEN, HAL HJALMAR;SMITH, GORDON JAMES |
分类号 |
G11B5/55;G11B5/596;(IPC1-7):G11B5/58 |
主分类号 |
G11B5/55 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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