公开(公告)号：US07349174B2

公开(公告)日：2008-03-25

申请号：US10143137

申请日：2002-05-09

申请人： Qiang Bi ,  Xiong Liu ,  LeeLing Tan ,  Wen-Jun Cao ,  ChoonKiat Lim

发明人： Qiang Bi ,  Xiong Liu ,  LeeLing Tan ,  Wen-Jun Cao ,  ChoonKiat Lim

IPC分类号： G11B5/596

CPC分类号： G11B27/36 ,  G11B19/04 ,  G11B2220/20

摘要： A method of preventing a write operation to a disc in a disc drive during a shock event without the use of a separate shock sensor comprises steps of monitoring an actuator voice coil motor (VCM) control plant output signal, generating an actuator voice coil motor (VCM) plant model module output signal, comparing the VCM plant model module output signal to the VCM control plant module output signal to produce a difference signal, and triggering a write protect gate if the difference signal exceeds a predetermined threshold value. The system comprises a voice coil motor (VCM) control plant module sensitive to a shock event providing a VCM control plant module output, a voice coil motor (VCM) plant model module initially insensitive to the shock event producing a VCM plant model module output, a first comparator module coupled to receive the VCM control plant module output and the VCM plant model module output, operable to generate a difference signal between the model plant module output and the VCM control plant module output, and a triggering module receiving the difference signal for generating a write protect gate signal if the difference signal exceeds a predetermined shock threshold.

摘要翻译： 一种在不使用单独的冲击传感器的情况下防止在磁盘驱动器中对盘的写入操作的方法包括以下步骤：监视致动器音圈电机（VCM）控制电路输出信号，产生致动器音圈电机 VCM）工厂模块模块输出信号，将VCM工厂模块模块输出信号与VCM控制站模块输出信号进行比较，产生差分信号，如果差分信号超过预定阈值则触发写保护门。 该系统包括对提供VCM控制工厂模块输出的冲击事件敏感的音圈电机（VCM）控制工厂模块，对产生VCM工厂模块模块输出的冲击事件最初不敏感的音圈电机（VCM）工厂模型模块， 第一比较器模块，其耦合以接收VCM控制工厂模块输出和VCM工厂模块模块输出，可操作以在模型工厂模块输出和VCM控制工厂模块输出之间产生差分信号;以及触发模块，其接收差分信号 如果差分信号超过预定的冲击阈值，则产生写保护门信号。