公开(公告)号：US07375917B1

公开(公告)日：2008-05-20

申请号：US09517176

申请日：2000-03-02

申请人： Yoshikatsu Fujii ,  Tsuyoshi Arai ,  Toshiyuki Kikuta ,  Takao Horiguchi ,  Shinji Matsushita

发明人： Yoshikatsu Fujii ,  Tsuyoshi Arai ,  Toshiyuki Kikuta ,  Takao Horiguchi ,  Shinji Matsushita

IPC分类号： G11B5/55

CPC分类号： G11B19/00 ,  G11B5/5534 ,  G11B19/046

摘要： When an idle seek operation of a magnetic disk drive is executed under a velocity control utilizing a back electromotive force of a VCM actuator, the accuracy of the velocity control is deteriorated due to temperature variation of the VCM. To eliminate this disadvantage, a calibration of the velocity control is executed by using control information, such as a track number read from the magnetic disk medium. After the velocity control has been executed for an appointed period, by detecting the back electromotive force from the VCM actuator, an MR sense current and a power of a read write LSI are turned on for a time, positioning information on the magnetic disk medium is read out, parameters to be used for the velocity control are calibrated, and thus a stability of the control can be obtained. Hereby, because the positioning information on the magnetic disk medium is not used constantly, the power consumption during the idle seek operation is reduced, and a stable control of the movement can be obtained as well. For a portable system such as a notebook type personal computer in which a magnetic disk drive is employed, the operation is improved with respect to the use of a battery.

摘要翻译： 当利用VCM致动器的反电动势的速度控制来执行磁盘驱动器的空闲搜索操作时，由于VCM的温度变化，速度控制的精度降低。 为了消除这种缺点，通过使用诸如从磁盘介质读取的轨道号等控制信息来执行速度控制的校准。 在指定时间段内执行速度控制后，通过检测来自VCM致动器的反向电动势，MR读取电流和读取写入LSI的功率一段时间被打开，磁盘介质上的定位信息为 读出，用于速度控制的参数被校准，因此可以获得控制的稳定性。 因此，由于不是不断地使用磁盘介质上的定位信息，因此减少了空闲寻找操作期间的功耗，并且还可以获得稳定的运动控制。 对于诸如使用磁盘驱动器的笔记本式个人计算机的便携式系统，关于使用电池的操作得到改善。

公开(公告)号：US06920007B2

公开(公告)日：2005-07-19

申请号：US10067401

申请日：2002-02-07

申请人： Hidefumi Tominaga ,  Tsuyoshi Arai ,  Takao Horiguchi ,  Toshiyuki Kikuta ,  Yoshikatsu Fujii

发明人： Hidefumi Tominaga ,  Tsuyoshi Arai ,  Takao Horiguchi ,  Toshiyuki Kikuta ,  Yoshikatsu Fujii

IPC分类号： G11B5/54 ,  G11B5/60 ,  G11B21/12 ,  G11B21/21 ,  G11B21/02

CPC分类号： G11B5/6005 ,  G11B5/54 ,  G11B21/12 ,  G11B21/21

摘要： To control load/unload operation of a slider with magnetic head mounted thereon, by which the speed can always be controlled stably while avoiding the slowdown or temporary stop of an actuator during load/unload operation, a magnetic disk drive is configured using magnetic disk media with the servo information written therein beforehand up to the track located at a position corresponding to the landing zone for the load operation of the magnetic head (slider). The speed of the magnetic head (slider) withdrawn to the ramp is controlled at the unload operation. In the stage of initialization for controlling the speed of the load/unload operation, various parameters are recorded and updated to apply a voltage to power amplifier for compensating for the external forces caused by the friction mainly exerted between ramp and slider support members, with reference to the take-off track or the landing track specified in the landing zone.

摘要翻译： 为了控制具有安装在其上的磁头的滑块的装载/卸载操作，通过该滑动器总是可以稳定地控制速度，同时避免在加载/卸载操作期间致动器的减速或暂时停止，磁盘驱动器使用磁盘介质 其中预先写入的伺服信息直到位于对应于着陆区的位置处的磁道用于磁头（滑块）的加载操作。 在卸载操作中控制撤回到斜坡的磁头（滑块）的速度。 在用于控制加载/卸载操作速度的初始化阶段，记录和更新各种参数以向功率放大器施加电压，以补偿主要由斜坡和滑动器支撑构件之间施加的摩擦引起的外力，参考 到着陆区指定的起飞轨道或着陆轨道。

公开(公告)号：US06510014B2

公开(公告)日：2003-01-21

申请号：US09761736

申请日：2001-01-18

申请人： Toshiyuki Kikuta ,  Takao Horiguchi ,  Tsuyoshi Arai ,  Yoshikatsu Fujii ,  Shinji Matsushita

发明人： Toshiyuki Kikuta ,  Takao Horiguchi ,  Tsuyoshi Arai ,  Yoshikatsu Fujii ,  Shinji Matsushita

IPC分类号： G11B1904

CPC分类号： G11B5/59627 ,  G11B5/00 ,  G11B5/012 ,  G11B19/04 ,  G11B33/08 ,  G11B33/10 ,  G11B33/14 ,  G11B2005/001

摘要： In a magnetic disk device and other memory devices, the scale and cycle of disturbance applied to each memory device are monitored to make a distinction between a harmful shock and harmless vibrations and detect the disturbance. Values at at least two points, of a waveform signal corresponding to the disturbance are captured. A) The above distinction is carried out from the size or magnitude of the inclination of a straight line defined by the two points. B) The function of capturing and storing the waveform signal corresponding to the disturbance as digital data, and outputting a slice level value for providing suitable detection sensitivity from a conversion table based on the digital data, or correcting and adjusting it and outputting the result is further set.