公开(公告)号：US5255253A

公开(公告)日：1993-10-19

申请号：US772725

申请日：1991-10-07

申请人： Naoyuki Kagami ,  Hiroaki Kubo ,  Keiichi Okada ,  Makoto Takekoshi

发明人： Naoyuki Kagami ,  Hiroaki Kubo ,  Keiichi Okada ,  Makoto Takekoshi

IPC分类号： G11B7/085 ,  G11B21/08 ,  G11B7/00

CPC分类号： G11B7/08517 ,  G11B21/083 ,  G11B7/08535

摘要： In this invention, a driving circuit for moving a head in the radial direction on the recording surface of a disk is coupled to a velocity detecting circuit for detecting the velocity at which the head moves. A velocity profile is provided for storing information on the target velocity of the head. A driving signal generating circuit is coupled to the velocity profile and the velocity detecting circuit for comparing a signal from the velocity detecting circuit with a signal from the velocity profile. The driving signal generating circuit outputs a driving signal to the driving circuit based on the result of the comparison. A controller is coupled to the driving circuit for measuring a time required for moving the head a predetermined distance at a predetermined reference value, and modifying the driving signal based on the result of the comparison. Scatter in feedback quantities or fluctuation in the driving signal during velocity control is thereby corrected.

公开(公告)号：US5402402A

公开(公告)日：1995-03-28

申请号：US26238

申请日：1993-03-01

申请人： Naoyuki Kagami ,  Hiroaki Kubo ,  Makoto Takekoshi

发明人： Naoyuki Kagami ,  Hiroaki Kubo ,  Makoto Takekoshi

IPC分类号： G11B21/10 ,  G11B7/085 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/08517 ,  G11B7/08529 ,  G11B7/0946

摘要： An optical disk drive apparatus operable under track following mode and seek mode wherein, upon the detection of a track following operation error, a seek operation is initiated for seeking a new target track at a predetermined number of tracks distant from the current track. The seek operation is controlled to follow a velocity profile thus regaining control over an optical head that may have been jolted into an out of control velocity when the track following error occurred. The velocity profile provides for a reduced velocity as the target track is approached. The new target track is selected at a relatively large number of tracks distant from the current track if the head velocity is high and at a relatively small number of current tracks if the head velocity is low. If the current track is sensed to be an outer track, the new target track is selected toward the inner track and if the current track is sensed to be an inner track, the new target track is selected to be an outer track.

摘要翻译： 一种光盘驱动装置，其在跟踪跟踪模式和追踪模式下可操作，其中，在检测到跟踪操作错误时，开始寻找操作，以在远离当前轨迹的预定数量的轨道上寻找新的目标轨迹。 搜索操作被控制以跟随速度分布，从而重新获得当光轨跟随误差发生时可能已经颠簸到失控速度的光学头的控制。 当目标轨迹接近时，速度分布提供了一个减小的速度。 如果头部速度较高，并且如果头部速度较低，则在相对较少数量的当前轨道上，在距离当前轨迹的相对较多数量的轨道上选择新的目标轨迹。 如果当前轨道被感测为外部轨道，则向内轨道选择新的目标轨道，并且如果当前轨道被感测为内部轨道，则将新的目标轨道选择为外部轨道。

公开(公告)号：US5459309A

公开(公告)日：1995-10-17

申请号：US138028

申请日：1993-10-19

申请人： Naoyuki Kagami ,  Makoto Takekoshi

发明人： Naoyuki Kagami ,  Makoto Takekoshi

IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/0908

摘要： The present invention ensures successful focus acquisition in an optical disk drive independent of a travelling speed of an objective lens at the time when a focus servo circuit loop is closed. The present invention provides sending a signal to a focus actuator for bringing an objective lens close to an in-focus position while a focus servo circuit loop is opened; closing the loop by shutting off the signal sent to the focus actuator; adding an offset of a predetermined level to the focus error signal; detecting that the focus error signal to which the offset is added reaches a predetermined level; and closing the loop when it is detected that the predetermined level is reached, and gradually decreasing the value of the offset to be added to the focus error signal.

摘要翻译： 本发明确保在聚焦伺服电路回路关闭时独立于物镜的移动速度的光盘驱动器中的成功的聚焦获取。 本发明在聚焦伺服电路回路打开的同时，向聚焦致动器发送信号，使物镜接近对焦位置; 通过关闭发送到聚焦致动器的信号来闭合回路; 向所述聚焦误差信号添加预定电平的偏移; 检测添加了偏移的聚焦误差信号达到预定水平; 并且当检测到达到预定电平时闭合环路，并逐渐减小要添加到聚焦误差信号的偏移值。

公开(公告)号：US06937422B2

公开(公告)日：2005-08-30

申请号：US10289603

申请日：2002-11-07

申请人： Hien Phu Dang ,  Mirei Hosono ,  Naoyuki Kagami ,  Kenji Okada ,  Arun Sharma ,  Gordon James Smith ,  Sri M. Sri-Jayantha

发明人： Hien Phu Dang ,  Mirei Hosono ,  Naoyuki Kagami ,  Kenji Okada ,  Arun Sharma ,  Gordon James Smith ,  Sri M. Sri-Jayantha

IPC分类号： G11B21/10 ,  G06F11/07 ,  G11B5/596 ,  G11B19/04 ,  G11B19/28

CPC分类号： G11B5/596 ,  G11B19/04

摘要： An apparatus and method of controlling an actuator of a data storage device detect and/or correct narrowband mechanical excitations such as due to spindle bearing defects through sensing and/or rejecting disturbance frequencies associated with such narrowband mechanical excitations in an actuator control signal generated by a data storage device controller. A narrowband filter may be used to reject, from an actuator control signal generated by a data storage device controller, a disturbance frequency associated with a spindle bearing defect in a data storage device, and disposed in proximity to a zero crossover frequency associated with the data storage device controller. In addition, a peak filter disposed in a control loop of a data storage device controller may be configured to detect a spindle bearing defect in a data storage device by detecting an amplitude of a control signal in the control loop in proximity to a disturbance frequency associated with the spindle bearing defect.

摘要翻译： 控制数据存储设备的致动器的装置和方法通过检测和/或排除与由这样的窄带机械激励相关联的干扰频率来检测和/或校正窄带机械激励，例如由于主轴承载缺陷而导致的致动器控制信号产生的干扰频率 数据存储设备控制器。 窄带滤波器可以用于从数据存储设备控制器产生的致动器控制信号中拒绝与数据存储设备中的主轴承载缺陷相关联的干扰频率，并且设置在与数据相关联的零交叉频率附近 存储设备控制器 此外，布置在数据存储装置控制器的控制环路中的峰值滤波器可以被配置为通过检测控制回路中与干扰频率相关联的控制信号的幅度来检测数据存储装置中的主轴承载缺陷 主轴轴承缺陷。

公开(公告)号：US06614613B1

公开(公告)日：2003-09-02

申请号：US09526261

申请日：2000-03-16

申请人： Fu-Ying Huang ,  Naoyuki Kagami ,  Tetsuo Semba ,  Eiji Soga ,  Shingo Tsuda

发明人： Fu-Ying Huang ,  Naoyuki Kagami ,  Tetsuo Semba ,  Eiji Soga ,  Shingo Tsuda

IPC分类号： G11B2110

CPC分类号： G05D19/02 ,  G11B5/10 ,  G11B5/5582 ,  G11B5/59627

摘要： An active control mechanism and method for stabilizing a servo-controlled actuator system such as an actuator system in a data recording disk drive by compensating the vibrational modes of the actuator's arm assembly. The control mechanism has a sensing arrangement which can include one or more individual sensors attached to the actuator at locations where they generate signals in phase with the vibrational modes, and especially with all the low-frequency major vibrational modes, of the arm assembly. A control mechanism derives from the signals an adjustment signal consisting of three corrective terms—a stiffening correction, an active damping correction, and an inertia correction by a phase correction. Furthermore, high-frequency out-of-phase modes can be stabilized by appropriately shifting the phase of the signals. The adjustment signal is used in the feedback control loop to stabilize the actuator system.

摘要翻译： 一种主动控制机构和方法，用于通过补偿致动器臂组件的振动模式来稳定伺服控制致动器系统，例如数据记录盘驱动器中的致动器系统。 控制机构具有感测装置，其可以包括一个或多个单独的传感器，其附接到致动器的位置，在那里它们与臂组件的振动模式，特别是与所有低频主要振动模式相同地产生信号。 控制机构从信号中获得由三个校正项组成的调整信号 - 加强校正，主动阻尼校正和通过相位校正的惯性校正。 此外，可以通过适当地移位信号的相位来稳定高频异相模式。 调节信号用于反馈控制回路以稳定执行器系统。

公开(公告)号：US06529344B1

公开(公告)日：2003-03-04

申请号：US09426425

申请日：1999-10-25

申请人： Naoyuki Kagami ,  Akira Tokizono

发明人： Naoyuki Kagami ,  Akira Tokizono

IPC分类号： G11B5596

CPC分类号： G11B5/59605

摘要： A method and system for compensating head positioning servo in a storage device. In accordance with the method and apparatus of the present invention, an open-loop gain of a head positioning servo is calculated when the head positioning servo causes a head to follow a predetermined position of a target track of a storage media surface by generating a position detecting signal utilizing a position detecting signal gain. A compensated position detecting signal gain is generated by compensating the position detecting signal gain according to a difference between a first predetermined value and the open-loop gain of the head positioning servo, such that variability of the position detecting signal and the open-loop gain is reduced to achieve stability in a head positioning servo.

摘要翻译： 一种用于补偿存储装置中的头部定位伺服的方法和系统。 根据本发明的方法和装置，当磁头定位伺服机构通过产生一个位置使磁头跟随存储介质表面的目标磁道的预定位置时，计算磁头定位伺服的开环增益 利用位置检测信号增益来检测信号。 通过根据第一预定值和头定位伺服的开环增益之间的差补偿位置检测信号增益来产生补偿位置检测信号增益，使得位置检测信号和开环增益的变化 减少了在头部定位伺服中的稳定性。

公开(公告)号：US06411056B1

公开(公告)日：2002-06-25

申请号：US09670770

申请日：2000-09-27

申请人： Gaku Ikedo ,  Naoyuki Kagami ,  Akinori Yuba

发明人： Gaku Ikedo ,  Naoyuki Kagami ,  Akinori Yuba

IPC分类号： G05B1118

CPC分类号： G11B19/28

摘要： A system and method for providing rotation control stability within a disk drive. In accordance with the system of the present invention, a disk storage medium on which information is recorded is driven to rotate by a multiphase-phase DC servomotor. An actuator is utilized for loading and unloading the head to and from the disk storage medium. A load/unload controller commands the actuator to load or unload said head. In order to effectively compensate for an abrupt change in load on the servomotor caused by loading the head onto the disk storage medium, a slew rate switching unit is utilized to alter a slew rate of current supplied to the three-phase DC servomotor, based on a loading start command issued by the load/unload controller.

摘要翻译： 一种用于在盘驱动器内提供旋转控制稳定性的系统和方法。 根据本发明的系统，通过多相DC伺服电动机驱动记录有信息的盘存储介质。 致动器用于将磁头装载到磁盘存储介质和从磁盘存储介质卸载磁头。 加载/卸载控制器命令执行器加载或卸载所述头。 为了有效地补偿将磁头装载到磁盘存储介质上而导致的伺服电机的负载突然变化，使用压摆率切换单元来改变提供给三相直流伺服电动机的电流的转换速率，基于 由加载/卸载控制器发出的加载启动命令。

公开(公告)号：US06219196B1

公开(公告)日：2001-04-17

申请号：US09153199

申请日：1998-09-14

申请人： Tetsuo Semba ,  Naoyuki Kagami ,  Akira Tokizono

发明人： Tetsuo Semba ,  Naoyuki Kagami ,  Akira Tokizono

IPC分类号： G11B2102

CPC分类号： G11B5/596

摘要： The present invention teaches the realization of a stable feedback control by selecting an optimal notch filter in an apparatus, such as a hard disk drive, that employs a positioning apparatus, such as an actuator, for positioning an object. The present invention further teaches the derivation of a frequency characteristic of a control loop excluding a notch filter by employing a method that does not damage a positioning apparatus. The present invention further teaches the method of adjusting a notch filter in accordance with a change of the resonant frequency of an actuator caused by the temperature fluctuations to prevent any deterioration of a feedback control performance.

摘要翻译： 本发明教导了通过在诸如硬盘驱动器的装置中选择最佳陷波滤波器来实现稳定的反馈控制，该设备采用诸如致动器的定位装置来定位物体。 本发明还通过采用不损坏定位装置的方法来教导除了陷波滤波器之外的控制回路的频率特性的推导。 本发明进一步教导了根据由温度波动引起的致动器的谐振频率的变化来调整陷波滤波器的方法，以防止反馈控制性能的任何劣化。

公开(公告)号：US06831809B2

公开(公告)日：2004-12-14

申请号：US10086204

申请日：2002-02-27

申请人： Naoyuki Kagami ,  Kenji Okada ,  Tetsuo Semba ,  Akira Tokizono ,  Hiroshi Uchida ,  Akinori Yuba

发明人： Naoyuki Kagami ,  Kenji Okada ,  Tetsuo Semba ,  Akira Tokizono ,  Hiroshi Uchida ,  Akinori Yuba

IPC分类号： G11B5596

CPC分类号： G11B5/59622

摘要： A control arrangement having a feedforward system and a feedback system, a control model for generating reference position data from a feedforward control signal is separated into an original control model and a compensation filter. Gain of the feedforward control signal is compensated by a gain compensation circuit to form a feedforward control signal after compensation. The reference position data is input to a feedback controller, and a feedback control signal and feedforward control signal are input to a control object. Coefficients of the compensation filter and the gain compensation circuit are compensated on the basis of a head position trajectory obtained by actual seek operation.

摘要翻译： 具有前馈系统和反馈系统的控制装置，用于从前馈控制信号产生参考位置数据的控制模型被分离成原始控制模型和补偿滤波器。 前馈控制信号的增益由增益补偿电路补偿，以在补偿后形成前馈控制信号。 参考位置数据被输入到反馈控制器，反馈控制信号和前馈控制信号被输入到控制对象。 补偿滤波器和增益补偿电路的系数基于通过实际寻道操作获得的磁头位置轨迹进行补偿。

公开(公告)号：US06707634B2

公开(公告)日：2004-03-16

申请号：US09950465

申请日：2001-09-10

申请人： Naoyuki Kagami ,  Masayuki Kanamaru ,  Shunichiroh Ohta ,  Akira Tokizono ,  Toshihiko Tsunokawa

发明人： Naoyuki Kagami ,  Masayuki Kanamaru ,  Shunichiroh Ohta ,  Akira Tokizono ,  Toshihiko Tsunokawa

IPC分类号： G11B3314

CPC分类号： G11B5/012 ,  G11B5/41 ,  G11B5/54 ,  G11B21/22 ,  G11B33/14 ,  G11B33/1446

摘要： A method and apparatus for use with a rotating storage device. The rotating storage device includes a storage medium driven to rotate, a head for reading and writing information on the storage medium and a ramped loading mechanism in which the head is stored. In accordance with the method of the present invention, the head is loaded from the ramped loading mechanism onto the storage medium. Next, location information stored in the storage medium via the head is read. A location of the head is then retained for a predetermined period above a track of a region other than a valid storage region of the storage medium after successfully reading the location information.

摘要翻译： 一种与旋转存储装置一起使用的方法和装置。 旋转存储装置包括被驱动旋转的存储介质，用于在存储介质上读取和写入信息的磁头以及其中存储磁头的倾斜加载机构。 根据本发明的方法，将头从斜坡加载机构装载到存储介质上。 接下来，读取通过头部存储在存储介质中的位置信息。 在成功读取位置信息之后，头部的位置被保持在存储介质的有效存储区域以外的区域的轨道上方的预定时段。