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    • 10. 发明授权
    • Methods for closed-loop compensation of ultra-high frequency disturbances in hard disk drives and hard disk drives utilizing same
    • 使用硬盘驱动器和硬盘驱动器的超高频干扰的闭环补偿方法
    • US08630059B1
    • 2014-01-14
    • US13408974
    • 2012-02-29
    • Xu ChenWei XiYoung-Hoon KimKuang-Yang Tu
    • Xu ChenWei XiYoung-Hoon KimKuang-Yang Tu
    • G11B5/596
    • G11B5/59694
    • A disk drive comprises a disk, an actuator arm and a servo controller using a position error signal to generate a controller output signal to control the actuator arm. A plant mechanically models at least a portion of the disk drive, receives a control command to which an unknown disturbance is added and generates a plant output. A disturbance observer (DOB) uses the control command and the plant output to generate a delayed and estimated version of the disturbance. The DOB comprises a Q filter having a selected center frequency. A perfect phase cancellation filter (PPCF) is configured to receive the delayed and estimated version of the disturbance, to reject selected disturbances and to align the desired attenuation frequency with the selected center frequency. The output of the PPCF is subtracted from the controller output signal to generate the control command.
    • 磁盘驱动器包括盘,致动器臂和使用位置误差信号的伺服控制器,以产生控制器输出信号以控制致动器臂。 工厂对至少一部分磁盘驱动器进行机械建模,接收到添加了未知扰动的控制命令,并生成工厂输出。 干扰观测器(DOB)使用控制命令和设备输出来产生干扰的延迟和估计版本。 DOB包括具有所选中心频率的Q滤波器。 完美相位消除滤波器(PPCF)被配置为接收干扰的延迟和估计版本,以抑制所选择的干扰并将期望的衰减频率与所选择的中心频率对准。 从控制器输出信号中减去PPCF的输出,生成控制命令。