公开(公告)号：US20060291088A1

公开(公告)日：2006-12-28

申请号：US11475384

申请日：2006-06-26

申请人： Takenori Atsumi ,  Atsushi Okuyama ,  Shinsuke Nakagawa

发明人： Takenori Atsumi ,  Atsushi Okuyama ,  Shinsuke Nakagawa

IPC分类号： G11B5/596

CPC分类号： G11B5/59605

摘要： In a magnetic disk device, oscillation occurring at a frequency higher than Nyquist frequency is suppressed. In one embodiment, a multi-late filter having a resonance point at a frequency higher than the intended Nyquist frequency is introduced in a previous stage of a controlled object. At that time, since a resonance characteristic of the multi-rate filter is aliased by a sampler, the multi-rate filter is designed such that the resonance point after the aliasing is stabilized in phase by a following compensator.

公开(公告)号：US07110223B2

公开(公告)日：2006-09-19

申请号：US11375071

申请日：2006-03-15

申请人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

发明人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

IPC分类号： G11B21/08

CPC分类号： G11B5/4833 ,  G11B5/4813 ,  G11B5/5526 ,  G11B5/5582

摘要： A carriage for a magnetic disk apparatus includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, and a carriage arm to which the suspension is attached. The carriage arm includes a suspension fixing portion, first and second arms arranged substantially in parallel with a disk surface, and a restricting member having a surface opposite to the first and second arms. The restricting member and the first arm, and the restricting member and the second arm are coupled via a viscoelastic body.

摘要翻译： 一种用于磁盘装置的滑架包括一个滑块，用于从盘上读取/写入信息的磁头安装在其上，用于承载滑块并用于向滑块施加预定载荷的悬架，以及滑架 附上悬挂物。 托架臂包括悬挂固定部分，基本上平行于盘表面布置的第一臂和第二臂，以及具有与第一臂和第二臂相对的表面的限制构件。 限制构件和第一臂以及限制构件和第二臂经由粘弹性体联接。

公开(公告)号：US06819522B2

公开(公告)日：2004-11-16

申请号：US10294595

申请日：2002-11-15

申请人： Takenori Atsumi ,  Masahito Kobayashi ,  Shinsuke Nakagawa

发明人： Takenori Atsumi ,  Masahito Kobayashi ,  Shinsuke Nakagawa

IPC分类号： G11B5596

CPC分类号： G11B5/5526

摘要： A positioning control apparatus for a magnetic disk apparatus. Internal models and a trajectory generation section are constructed in a control program. Based on generated position trajectory and velocity trajectory and an internal model position and velocity, a model control section outputs a first operation signal Umf for a fixed sample time Tu and then outputs a second operation signal Ums for Tu. The model control section calculates Umf and Ums so as to cause a position Pm and a velocity Vm output by an internal model 2Tu seconds later to coincide with the generated position trajectory and velocity trajectory. When a detector has detected a voice coil saturation current for head movement, a signal obtained by subtracting a position feedback signal Uh from a detected voice coil current is used as an internal model input to thereby cause the model to track a control subject.

摘要翻译： 一种用于磁盘装置的定位控制装置。 在控制程序中构建内部模型和轨迹生成部分。 基于生成的位置轨迹和速度轨迹以及内部模型位置和速度，模型控制部分输出固定采样时间Tu的第一操作信号Umf，然后输出Tu的第二操作信号Ums。 模型控制部分计算Umf和Ums，以使秒针后的内部模型输出的位置Pm和速度Vm与生成的位置轨迹和速度轨迹一致。 当检测器检测到用于磁头移动的音圈饱和电流时，将通过从检测到的音圈电流中减去位置反馈信号Uh而获得的信号用作内部模型输入，从而使模型跟踪控制对象。

公开(公告)号：US07474494B2

公开(公告)日：2009-01-06

申请号：US11475384

申请日：2006-06-26

申请人： Takenori Atsumi ,  Atsushi Okuyama ,  Shinsuke Nakagawa

发明人： Takenori Atsumi ,  Atsushi Okuyama ,  Shinsuke Nakagawa

IPC分类号： G11B5/596

CPC分类号： G11B5/59605

摘要： In a magnetic disk device, oscillation occurring at a frequency higher than Nyquist frequency is suppressed. In one embodiment, a multi-late filter having a resonance point at a frequency higher than the intended Nyquist frequency is introduced in a previous stage of a controlled object. At that time, since a resonance characteristic of the multi-rate filter is aliased by a sampler, the multi-rate filter is designed such that the resonance point after the aliasing is stabilized in phase by a following compensator.

摘要翻译： 在磁盘装置中，抑制了频率高于奈奎斯特频率的振荡。 在一个实施例中，在受控对象的前一阶段中引入具有高于预期奈奎斯特频率的频率的谐振点的多延迟滤波器。 此时，由于多速率滤波器的共振特性由采样器进行混叠，所以多速率滤波器被设计成使得混叠后的共振点通过后续的补偿器相位稳定。

公开(公告)号：US20060158786A1

公开(公告)日：2006-07-20

申请号：US11375071

申请日：2006-03-15

申请人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

发明人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

IPC分类号： G11B5/55

CPC分类号： G11B5/4833 ,  G11B5/4813 ,  G11B5/5526 ,  G11B5/5582

摘要： A carriage for a magnetic disk apparatus includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, and a carriage arm to which the suspension is attached. The carriage arm includes a suspension fixing portion, first and second arms arranged substantially in parallel with a disk surface, and a restricting member having a surface opposite to the first and second arms. The restricting member and the first arm, and the restricting member and the second arm are coupled via a viscoelastic body.

摘要翻译： 一种用于磁盘装置的滑架包括一个滑块，用于从盘上读取/写入信息的磁头安装在其上，用于承载滑块并用于向滑块施加预定载荷的悬架，以及滑架 附上悬挂物。 托架臂包括悬挂固定部分，基本上平行于盘表面布置的第一臂和第二臂，以及具有与第一臂和第二臂相对的表面的限制构件。 限制构件和第一臂以及限制构件和第二臂经由粘弹性体联接。

公开(公告)号：US06927934B2

公开(公告)日：2005-08-09

申请号：US10436270

申请日：2003-05-13

申请人： Takenori Atsumi

发明人： Takenori Atsumi

IPC分类号： G11B21/08 ,  G05D3/12 ,  G11B5/596 ,  G11B21/10

CPC分类号： G11B5/59627

摘要： A magnetic disk apparatus includes a following compensator for measuring a frequency characteristic of an under-control object to stabilize a vibration mode of the under-control object with phase condition and a resonance filter having a resonance point in the vicinity of a frequency at which positioning accuracy is to be enhanced, being coupled in parallel to the under-control object. Polarity of mode constant of the resonance filter is so determined as to stabilize a vibration mode brought about by the resonance filter on the basis of a relation between the frequency stabilized by a control system and the phase-180° crossover frequency. Positioning accuracy at a specific frequency can be enhanced without involving unstability in the control system even in a frequency range where sensitivity function of the control system is higher than 0 dB inclusive.

摘要翻译： 磁盘装置包括以下补偿器，用于测量欠控制对象的频率特性，以使相位条件下的不受控制对象的振动模式稳定，并且具有在定位的频率附近具有共振点的谐振滤波器 要提高精度，并且与控制不足对象并联。 谐振滤波器的模式常数的极性被确定为基于由控制系统稳定的频率与180°相位频率之间的关系来稳定由谐振滤波器引起的振动模式。 即使在控制系统的灵敏度功能高于0dB的频率范围内，也可以提高特定频率的定位精度，而不涉及控制系统中的不稳定性。

公开(公告)号：US08059356B2

公开(公告)日：2011-11-15

申请号：US12631729

申请日：2009-12-04

申请人： Chikako Sakagami ,  Kazuhisa Shishida ,  Isao Yoneda ,  Kazuaki Usui ,  Hiroshi Uchida ,  Takeshi Saito ,  Kenji Tomida ,  Takenori Atsumi

发明人： Chikako Sakagami ,  Kazuhisa Shishida ,  Isao Yoneda ,  Kazuaki Usui ,  Hiroshi Uchida ,  Takeshi Saito ,  Kenji Tomida ,  Takenori Atsumi

IPC分类号： G11B21/02

CPC分类号： G11B5/5582 ,  G11B5/596 ,  G11B5/59622

摘要： A disk drive. The disk drive includes a head, a moving mechanism, a first peak filter, an adaptive peak filter, and a filter controller. The head is configured to read servo data on a disk at sampling frequency. The moving mechanism is configured to move the head in proximity with a recording surface of the disk. The first peak filter has a fixed peak frequency and a variable gain, and is configured to be inserted into a servo loop. The servo loop is configured to position the head with position error signals between servo data read by the head and a target position. The adaptive peak filter has a variable peak frequency and a variable gain, and is configured to be inserted into the servo loop. The filter controller is configured to control the gain of the adaptive peak filter according to the gain of the first peak filter.

摘要翻译： 磁盘驱动器 磁盘驱动器包括磁头，移动机构，第一峰值滤波器，自适应峰值滤波器和滤波器控制器。 磁头被配置为以采样频率读取磁盘上的伺服数据。 移动机构被配置为使磁头靠近磁盘的记录表面移动。 第一峰值滤波器具有固定的峰值频率和可变增益，并被配置为插入到伺服环路中。 伺服回路被配置为在头部读取的伺服数据与目标位置之间定位头部位置误差信号。 自适应峰值滤波器具有可变的峰值频率和可变增益，并被配置为插入到伺服环路中。 滤波器控制器被配置为根据第一峰值滤波器的增益来控制自适应峰值滤波器的增益。

公开(公告)号：US07545607B2

公开(公告)日：2009-06-09

申请号：US11516608

申请日：2006-09-07

申请人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

发明人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

IPC分类号： G11B5/55

CPC分类号： G11B5/4833 ,  G11B5/4813 ,  G11B5/5526 ,  G11B5/5582

摘要： A carriage includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, a carriage arm to which the suspension is attached, and a body section to which the carriage arm is connected. The carriage arm includes a suspension fixing portion, as arm arranged substantially in parallel with a disk surface, and a restricting member which is a thin-plate-like member having a surface which is opposite to the plane of arm which is parallel to the disk surface. The restricting member and the arm are coupled via a viscoelastic body.

摘要翻译： 一种滑架，其上安装有用于从/向盘读取/写入信息的磁头的滑块，用于承载滑块并用于向滑块施加预定负载的悬架，附接有悬架的滑架臂，以及 连接有托架臂的主体部分。 托架臂包括悬挂固定部分，作为布置成基本上与盘表面平行的臂，以及限制构件，其是具有与臂的平面相反的表面的薄板状构件，该平面平行于盘 表面。 限制构件和臂通过粘弹性体联接。

公开(公告)号：US06879467B2

公开(公告)日：2005-04-12

申请号：US10157087

申请日：2002-05-30

申请人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

发明人： Toshihiko Shimizu ,  Tetsuya Hamaguchi ,  Toshihiro Arisaka ,  Hiromitsu Masuda ,  Gentaro Nakamura ,  Takenori Atsumi

IPC分类号： G11B5/55 ,  G11B23/00

CPC分类号： G11B5/4833 ,  G11B5/4813 ,  G11B5/5526 ,  G11B5/5582

摘要： According to the invention, there is provided a carriage arm assembly including a carriage arm having two arm members. The arm member is constructed in such a way that the width of its coil side end and the width of its suspension side end are narrower than that of its intermediate area. This construction widens a servo band width, improves positioning accuracy, and reduces positioning errors of a magnetic disk apparatus, so that recording density is improved and storage capacity is increased. Further, by coupling two arm members using a restriction member via a visco-elastic member, it is possible to achieve a high damping effect on various vibration modes including in-plane bending of the arms, and suppress vibration of the carriage so as to reduce the positioning errors.

摘要翻译： 根据本发明，提供了一种滑架臂组件，其包括具有两个臂构件的滑架臂。 臂构件的构造使得其线圈侧端的宽度和其悬挂侧端的宽度比其中间区域的宽度窄。 该结构扩大了伺服带宽，提高了定位精度，并且减小了磁盘装置的定位误差，从而提高了记录密度并提高了存储容量。 此外，通过经由粘弹性构件使用限制构件联接两个臂构件，可以对包括臂的平面内弯曲的各种振动模式实现高阻尼效果，并且抑制滑架的振动以减少 定位错误。

公开(公告)号：US20120106000A1

公开(公告)日：2012-05-03

申请号：US13266524

申请日：2010-04-02

申请人： Shuya Nosaki ,  Takenori Atsumi

发明人： Shuya Nosaki ,  Takenori Atsumi

IPC分类号： G11B21/02

CPC分类号： G11B5/59627

摘要： A track locus drawn on a disk discretely contains repeatable runout (RRO) components which are large in amplitude up to high-frequency band. In order to position a magnetic head along the track locus using filters good at suppressing RRO with resonance characteristics only at an integral multiple of a rotation frequency, many filters are required and thus it takes a long time for all the filters to go into a steady state. After learning until the filers go into a steady state, output values of the filters in a steady state are stored on a disk or in a memory. According to controlling the magnet head using these stored output values, the time required for the filters to go into a steady state becomes unnecessary.

摘要翻译： 在盘上绘制的轨道轨迹离散地包含幅度高达高频带的可重复跳动（RRO）分量。 为了使用具有谐振特性的滤波器的滤波器沿着轨道轨迹定位磁头，仅使用旋转频率的整数倍，需要许多滤波器，因此所有滤波器需要很长时间才能进入稳定 州。 在学习到文件管理器进入稳定状态之后，处于稳定状态的滤波器的输出值被存储在磁盘或存储器中。 根据使用这些存储的输出值来控制磁头，使得滤波器进入稳定状态所需的时间变得不必要。