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    • 5. 发明授权
    • Compensating for vortex shedding in a disk drive for modifying the thickness of an actuator arm
    • 通过修改致动器臂的厚度来补偿磁盘驱动器中的涡流脱落
    • US06441998B1
    • 2002-08-27
    • US09585127
    • 2000-05-31
    • Scott D. Abrahamson
    • Scott D. Abrahamson
    • G11B2121
    • G11B5/6005G11B5/58Y10T29/49025
    • A method of designing an actuator arm of a head stack assembly for use in a disk drive is disclosed. The disk drive comprises a disk, the actuator arm for positioning a head over the disk while the disk is rotating at a selected spin-rate. The actuator arm having a leading edge and a trailing edge and a selected thickness, and the head stack assembly having a structural resonance frequency. The disk is rotated such that the disk generates air flow around the actuator arm while the disk is spinning at the selected spin-rate. The actuator arm positions the head over the disk while the disk is spinning at the selected spin-rate, wherein the air flow travels from the leading edge to the trailing edge of the actuator arm such that the air flow causes vortex shedding at a vortex shedding frequency resulting in an undesirable force being applied to the actuator arm when the vortex shedding frequency is aligned with the structural resonance frequency. A perturbing effect due to the undesirable force applied to the actuator arm is measured. The thickness of the actuator arm is then modified and the thickness data stored. The process is then reiterated for a plurality of different actuator arm thickness values. A manufacturing thickness is then selected for the actuator arm from the stored thickness data to compensate for the undesirable force that is applied to the actuator arm due to the vortex shedding.
    • 公开了一种设计用于磁盘驱动器的磁头堆叠组件的致动器臂的方法。 磁盘驱动器包括盘,致动器臂用于在磁盘以选定的旋转速率旋转的同时将磁头定位在磁盘上。 致动器臂具有前缘和后缘以及所选择的厚度,并且头部堆叠组件具有结构共振频率。 旋转磁盘使得磁盘在致动器臂周围产生空气流,同时磁盘以选定的旋转速度旋转。 执行器臂将磁头定位在磁盘上,同时磁盘以选定的旋转速度旋转,其中空气流从致动器臂的前缘移动到后缘,使得气流在涡旋脱落时引起涡流脱落 当涡旋脱落频率与结构共振频率对准时,频率导致不期望的力施加到致动器臂。 测量由于施加到致动器臂的不期望的力引起的扰动效应。 然后修改致动器臂的厚度,并存储厚度数据。 然后重复该过程用于多个不同的致动器臂厚度值。 然后从存储的厚度数据中为致动器臂选择制造厚度以补偿由于涡流脱落而施加到致动器臂的不期望的力。