- 专利标题: Method for secondary-actuator failure detection and recovery in a dual-stage actuator disk drive
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申请号: US11051432申请日: 2005-02-03
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公开(公告)号: US20060171062A1公开(公告)日: 2006-08-03
- 发明人: Toshiki Hirano , Matthew White , Satoshi Yamamoto
- 申请人: Toshiki Hirano , Matthew White , Satoshi Yamamoto
- 主分类号: G11B5/596
- IPC分类号: G11B5/596
摘要:
A method for secondary-actuator failure-detection and recovery in a dual-stage actuator disk drive includes running a calibration test by the servo control processor and measuring the position of the secondary actuator relative to its neutral position in response to the calibration test. The secondary-actuator failure detection and calibration test can be performed on a regular schedule or at selected times, such as at disk drive start-up. With the primary actuator biased at a test location, such as a crash stop or a load/unload ramp, the servo control processor generates a test signal to the secondary actuator and receives a relative-position signal (RPS) from the relative-position sensor in response to the test signal. The test comprises two measurements: a measurement of the secondary actuator static characteristics, and a measurement of the secondary actuator dynamic characteristics.