公开(公告)号：US06798604B1

公开(公告)日：2004-09-28

申请号：US09696833

申请日：2000-10-26

Applicant: Mitsuo Kamimura ,  Yoshinari Higashino ,  Kiyoshi Sakuma ,  Yukio Abe ,  Kunihiro Shimada ,  Atsushi Suzuki ,  Takeshi Hara ,  Kentaroh Katoh

Inventor： Mitsuo Kamimura ,  Yoshinari Higashino ,  Kiyoshi Sakuma ,  Yukio Abe ,  Kunihiro Shimada ,  Atsushi Suzuki ,  Takeshi Hara ,  Kentaroh Katoh

IPC: G11B2102

CPC classification number: G11B21/083 ,  G11B5/5547 ,  G11B5/5582

Abstract: The controller circuit is designed to generate the positioning control signal based on the positional deviation of the head from a target recording track on a recording medium. A feedback control is effected to position the head right on a trajectory corresponding to the target recording track based on the generated positioning control signal. The positioning control signal is subjected to filtering at a notch filter. The cutoff frequency of the notch filter is set depending on the temperature detected at a thermal sensor. Even when the resonant frequency shifts in response to variation in temperature, the cutoff frequency of the notch filter follows the shift of the resonant frequency. A narrower bandwidth of the cutoff frequency still achieves reduction in the amplitude of the frequency component corresponding to the resonant frequency. The resonance or continuous vibration can reliably be prevented in the head. A rapid response can be accomplished in positioning the head right on a trajectory corresponding to the target recording track because of a narrower bandwidth of the cutoff frequency.

Abstract translation: 控制器电路被设计成基于头与记录介质上的目标记录轨迹的位置偏差来产生定位控制信号。 基于产生的定位控制信号，进行反馈控制以将头部位于与目标记录轨道相对应的轨迹上。 定位控制信号在陷波滤波器处进行滤波。 陷波滤波器的截止频率根据热传感器检测到的温度而设定。 即使当谐振频率随温度变化而变化时，陷波滤波器的截止频率跟随谐振频率的移动。 截止频率的较窄带宽仍然实现了对应于谐振频率的频率分量的振幅的降低。 可以可靠地防止头部中的共振或连续振动。 由于截止频率的带宽较窄，所以可以在将头部对准目标记录轨道的轨迹上进行快速响应。

公开(公告)号：US5638307A

公开(公告)日：1997-06-10

申请号：US410687

申请日：1995-03-27

Applicant: Mitsuo Kamimura ,  Masao Tsunekawa ,  Eisaku Takahashi

Inventor： Mitsuo Kamimura ,  Masao Tsunekawa ,  Eisaku Takahashi

IPC: G06F1/26 ,  G06F1/30 ,  G11B19/00 ,  G11B19/20 ,  H02P23/06 ,  G06F1/00 ,  G11B5/52 ,  H02P7/68

CPC classification number: H02P29/026 ,  G06F1/30 ,  H02P23/06

Abstract: A disk apparatus wherein a disk is rotated by a rotating motor, and a source power supplied to the rotating motor is monitored, which includes: a memory unit for storing an initial source voltage value before a process of a rotating motor acceleration is started; a detecting unit for periodically detecting a source voltage value related to the source power; a comparing unit for comparing the source voltage value, detected by the detecting unit during the process of the rotating motor acceleration, with the initial source voltage value stored in the memory unit, and for outputting a voltage fluctuation indicated by a difference between the source voltage value and the initial source voltage value; and a control unit for setting a quantity of the source power supplied to the rotating motor, to a smaller quantity in response to the voltage fluctuation output by the comparing unit.

Abstract translation: 一种磁盘装置，其中盘被旋转电动机旋转，并且监测提供给旋转电动机的源电力，其包括：用于在开始旋转电动机加速的处理之前存储初始源电压值的存储单元; 用于周期性地检测与源功率相关的源电压值的检测单元; 比较单元，用于将由旋转马达加速过程中的检测单元检测的源电压值与存储在存储单元中的初始源电压值进行比较，并输出由源电压 值和初始源电压值; 以及控制单元，用于响应于由比较单元输出的电压波动，将提供给旋转电动机的源电力量设定为较小量。