| 摘要 |
PROBLEM TO BE SOLVED: To provide a yaw angle control mechanism capable of maintaining yaw angle constant in a tangential direction. SOLUTION: This mechanism is provided with a slider 25, a MA 33 for driving the slider to rotate relative to a suspension arm, and a VCM 22 for rotary-driving the slider 25 and the suspension arm. The MA control system is provided with a yaw angle correction table 32 that stores detected track number and bias current for setting a yaw angle constant, constituting a FB system in the MA 33. The VCM control system constitutes a FB control system that enters the output current of a position error controller 21 to the VCM 22 and outputs a detected position error. Furthermore, an external disturbance compensation table is provided for storing an external disturbance compensation current to compensate for generated external disturbances. Positioning is carried out, by adding an external disturbance compensation current, based on a track number detected by the reproducing head to the output current of the position error controller 21 by FF. COPYRIGHT: (C)2008,JPO&INPIT
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