公开(公告)号：US06690533B2

公开(公告)日：2004-02-10

申请号：US09792648

申请日：2001-02-23

申请人： Terang KongBeng Thia ,  Joseph HengTung Lau ,  Jeffrey SoonBeng Sim ,  Stephen KowChiew Kuan ,  CheeWai SeeToh

发明人： Terang KongBeng Thia ,  Joseph HengTung Lau ,  Jeffrey SoonBeng Sim ,  Stephen KowChiew Kuan ,  CheeWai SeeToh

IPC分类号： G11B2102

CPC分类号： G11B5/5582 ,  G11B21/083 ,  G11B25/043 ,  G11B33/08

摘要： The present invention provides a method to determine and to locate the position of the imbalance torque of an actuator in a disc drive. There are several steps performing different functions in the method. The first step of the method performs the function of obtaining a difference in the voice coil motor (VCM) current of the disc drive in the X orientation and in the Y orientation with the VCM current of the disc drive when the disc drive is placed flat. The second step performs the function of obtaining the square of each difference in VCM current. The third step performs the function of obtaining the imbalance by adding the square of the VCM current and subsequent square root of the addition. The valve of the imbalance torque is obtained by multiplying the imbalance with the torque constant. The fourth step performs the function of obtaining a division value of the VCM current in the X orientation or in the Y orientation with the VCM current of the disc drive when the disc drive is placed flat. The fifth step performs the function of obtaining the angle between the x-axis and the distance of the imbalance torque of the actuator from the pivot centre and measuring the mass of the actuator. The sixth step performs the function of obtaining the cosine or sine of the angle and multiple either angle with the mass of the actuator. The position of the imbalance torque is located and determined either from dividing the divided value in X orientation in the fourth step with the cosine angle in the sixth step or dividing the divided value in Y orientation in the fourth step with the sine angle in the sixth step.

摘要翻译： 本发明提供了一种确定和定位盘驱动器中致动器的不平衡转矩的位置的方法。 在方法中执行不同功能有几个步骤。 该方法的第一步执行当磁盘驱动器放置平坦时，利用磁盘驱动器的VCM电流在X方向和Y方向上获得盘驱动器的音圈电动机（VCM）电流的差异的功能 。 第二步执行获取VCM电流中每个差的平方的功能。 第三步通过添加VCM当前的平方和随后的平方根来执行获得不平衡的功能。 通过将不平衡与转矩常数相乘来获得不平衡转矩的阀。 第四步执行当磁盘驱动器放置平坦时，利用磁盘驱动器的VCM电流在X方向或Y方向上获得VCM电流的除法值。 第五步执行获得x轴与致动器的不平衡转矩与枢轴中心的距离之间的角度并测量致动器的质量的功能。 第六步执行角度的余弦或正弦和与执行器的质量成多个角度的功能。 不平衡扭矩的位置是通过将第四步骤中的X取向中的分割值除以第六步骤中的余弦角，或者将第四步骤中的Y方向的分割值除以第六步中的正弦角度来定位和确定的 步。

公开(公告)号：US06563661B2

公开(公告)日：2003-05-13

申请号：US09773972

申请日：2001-01-31

申请人： Terang KongBeng Thia ,  Joseph HengTung Lau ,  Stephen KowChiew Kuan ,  Jeffrey SoonBeng Sim

发明人： Terang KongBeng Thia ,  Joseph HengTung Lau ,  Stephen KowChiew Kuan ,  Jeffrey SoonBeng Sim

IPC分类号： G11B2102

CPC分类号： G11B5/59611 ,  G11B33/10

摘要： A preferred system for measuring bearing friction first measures voice coil motor current values required to move an actuator arm assembly to each of several cylinder position intervals. Torque values required to move the actuator arm assembly are then computed using the measured voice coil motor currents. Drive-level bearing friction values are then calculated using the computed torque values and then combined into a composite indicator.

摘要翻译： 用于测量轴承摩擦的优选系统首先测量将致动器臂组件移动到几个气缸位置间隔中的每一个所需的音圈电机电流值。 然后使用测量的音圈电机电流计算移动执行器臂组件所需的扭矩值。 然后使用计算的扭矩值计算驱动级轴承摩擦值，然后组合成复合指示器。