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The paper proposes a control scheme for detecting and compensating the low-frequency vibrations in hard disk drive systems. A vibration detector is proposed, utilizing the down-sampled position error signal (PES). Due to the performance limitation in loop shaping, attenuating low-frequency vibration is usually penalized by high frequency disturbance amplification. This paper proposes an adaptive scheme...
This digest first proposes a scheme of detecting low-frequency vibration based on down-sampled position error signal (PES). When vibration is detected, vibration compensation method is applied to identify and compensate the vibration-induced disturbance from plant input. Hard drive experiment on vibration shaker validated the effectiveness of this scheme.
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