MAGNETIC DISK DRIVE AND METHOD FOR CONTROLLING MIC

专利名称：MAGNETIC DISK DRIVE AND METHOD FOR

CONTROLLING MICROACTUATOR INMAGNETIC DISK DRIVE

发明人：Hideki HIRONAKA,Tatsurou SASAMOTO申请号：US13311459申请日：20111205

公开号：US20120194943A1公开日：20120802

专利附图：

摘要：According to one embodiment, a magnetic disk drive includes a detector and aservo controller. The detector detects, as actual timestamps, time intervals at which a

head reads servo sync marks recorded on a disk at predetermined intervals. The servocontroller controls a VCM actuator and a microactuator with feedback control in order toposition the head at a target position. The servo controller comprises a feedforwardcontroller configured to compensate for disturbance. The feedforward controllercomprises a difference detector and an integrator. The difference detector detects adeviation of the actual timestamps from target timestamps as a timestamp difference.The integrator configured to convert the detected timestamp difference into

displacement of the microactuator by integrating the detected timestamp difference.The feedforward controller provides a manipulating variable corresponding to theconverted displacement, to a feedback control loop for the microactuator as afeedforward manipulating variable.

申请人：Hideki HIRONAKA,Tatsurou SASAMOTO

地址：Sagamihara-shi JP,Tama-shi JP

国籍：JP,JP

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