Invention Application
US20060066985A1 DISK DRIVE WITH CAPACITANCE SENSING OF DISK VIBRATION AND FEEDFORWARD CONTROL FOR REMOVAL OF READ/WRITE HEAD TRACK MISREGISTRATION
失效
磁带驱动器,具有磁盘振动和前馈控制的电容感测,用于去除读/写头跟踪误差
- Patent Title: DISK DRIVE WITH CAPACITANCE SENSING OF DISK VIBRATION AND FEEDFORWARD CONTROL FOR REMOVAL OF READ/WRITE HEAD TRACK MISREGISTRATION
- Patent Title (中): 磁带驱动器,具有磁盘振动和前馈控制的电容感测,用于去除读/写头跟踪误差
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Application No.: US10956908Application Date: 2004-09-30
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Publication No.: US20060066985A1Publication Date: 2006-03-30
- Inventor: Toshiki Hirano , Tetsuo Semba , Matthew White
- Applicant: Toshiki Hirano , Tetsuo Semba , Matthew White
- Main IPC: G11B5/596
- IPC: G11B5/596

Abstract:
A data recording disk drive has a plurality of capacitive sensors, each sensor facing a surface of an associated disk, a capacitance sensing circuit for converting the sensed capacitance to a voltage representative of the distance between the sensor and the disk surface, and a feedforward controller that receives the voltage signal. The feedforward controller has a transfer function with gain and phase characteristics designed to match the transfer function from the out-of-plane disk vibration to the position of the read/write head while accounting for the effects of the sensor dynamics and the dynamics of the actuator. The output from the feedforward controller is combined with the output from the disk drive's servo feedback controller so that the effects of disk vibration on track misregistration of the head are removed from the control signal to the actuator.
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