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公开(公告)号：US08553348B2
公开(公告)日：2013-10-08
申请号：US12824160
申请日：2010-06-26
IPC分类号： G11B21/02
CPC分类号： G11B5/59622
摘要： A disk drive. The disk drive includes a head, an actuator, and a controller. The head accesses a disk. The actuator is configured to support the head and to move the head by action of a voice-coil motor in a substantially radial direction of the disk. The controller is also configured to perform servo control of the actuator by using servo data read out by the head. The controller includes at least one of a plurality of notch filters having a fixed center frequency inserted in a servo-control loop. The controller is configured to increase an attenuation rate by at least one of the plurality of notch filters having the fixed center frequency at a designated frequency, when a target position of the head is at a position selected from the group consisting of a position outside of a specified region and a position within the specified region.
摘要翻译： 磁盘驱动器 磁盘驱动器包括磁头，致动器和控制器。 磁头访问磁盘。 致动器被构造成支撑头部并且通过音圈电动机在盘的大致径向方向上的动作来移动头部。 控制器还被配置为通过使用由头读出的伺服数据来执行致动器的伺服控制。 控制器包括插入伺服控制回路中的具有固定的中心频率的多个陷波滤波器中的至少一个。 控制器被配置为当头部的目标位置处于从包括位于外部位置之外的位置的位置时，以具有指定频率的固定中心频率的多个陷波滤波器中的至少一个增加衰减率 指定区域和指定区域内的位置。
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公开(公告)号：US20100328810A1
公开(公告)日：2010-12-30
申请号：US12824160
申请日：2010-06-26
IPC分类号： G11B21/02
CPC分类号： G11B5/59622
摘要： A disk drive. The disk drive includes a head, an actuator, and a controller. The head accesses a disk. The actuator is configured to support the head and to move the head by action of a voice-coil motor in a substantially radial direction of the disk. The controller is also configured to perform servo control of the actuator by using servo data read out by the head. The controller includes at least one of a plurality of notch filters having a fixed center frequency inserted in a servo-control loop. The controller is configured to increase an attenuation rate by at least one of the plurality of notch filters having the fixed center frequency at a designated frequency, when a target position of the head is at a position selected from the group consisting of a position outside of a specified region and a position within the specified region.
摘要翻译： 磁盘驱动器 磁盘驱动器包括磁头，致动器和控制器。 磁头访问磁盘。 致动器被构造成支撑头部并且通过音圈电动机在盘的大致径向方向上的动作来移动头部。 控制器还被配置为通过使用由头读出的伺服数据来执行致动器的伺服控制。 控制器包括插入伺服控制回路中的具有固定的中心频率的多个陷波滤波器中的至少一个。 控制器被配置为当头部的目标位置处于从包括位于外部位置之外的位置的位置时，以具有指定频率的固定中心频率的多个陷波滤波器中的至少一个增加衰减率 指定区域和指定区域内的位置。
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公开(公告)号：US08737010B2
公开(公告)日：2014-05-27
申请号：US12876802
申请日：2010-09-07
IPC分类号： G11B5/596
CPC分类号： G11B5/59622
摘要： A disk drive comprising a head for accessing a disk, an actuator for moving the head in the radial direction of the disk and a controller. The controller for servo control of the actuator based on servo data read out from the disk by the head. The controller is configured for maintaining a width of the adaptive chasing notch filter below a specified value in servo system control and estimating an oscillation frequency of the actuator.
摘要翻译： 一种磁盘驱动器，包括用于访问磁盘的磁头，用于沿磁盘的径向移动磁头的致动器和控制器。 伺服控制器，用于伺服控制，基于从磁盘读出的伺服数据。 控制器被配置为在伺服系统控制中将自适应追赶陷波滤波器的宽度保持在指定值以下，并且估计致动器的振荡频率。
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公开(公告)号：US20100142082A1
公开(公告)日：2010-06-10
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
发明人： Chikako Sakagami , Kazuhisa Shishida , Isao Yoneda , Kazuaki Usui , Hiroshi Uchida , Takeshi Saito , Kenji Tomida
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。
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公开(公告)号：US20110058276A1
公开(公告)日：2011-03-10
申请号：US12876802
申请日：2010-09-07
IPC分类号： G11B5/596
CPC分类号： G11B5/59622
摘要： A disk drive comprising a head for accessing a disk, an actuator for moving the head in the radial direction of the disk and a controller. The controller for servo control of the actuator based on servo data read out from the disk by the head. The controller is configured for maintaining a width of the adaptive chasing notch filter below a specified value in servo system control and estimating an oscillation frequency of the actuator.
摘要翻译： 一种磁盘驱动器，包括用于访问磁盘的磁头，用于沿磁盘的径向移动磁头的致动器和控制器。 伺服控制器，用于伺服控制，基于从磁盘读出的伺服数据。 控制器被配置为在伺服系统控制中将自适应追赶陷波滤波器的宽度保持在指定值以下，并且估计致动器的振荡频率。
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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。
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7.发明申请Servo information recording method, magnetic recording media, and magnetic disk apparatus 失效伺服信息记录方法，磁记录介质和磁盘装置公开(公告)号：US20060152843A1
公开(公告)日：2006-07-13
申请号：US11331921
申请日：2006-01-12
IPC分类号： G11B21/02
CPC分类号： G11B5/59655
摘要： Embodiments of the invention provide optimum servo patterns for perpendicular magnetic recording method. In one embodiment, a burst field of servo patterns is composed of burst-signal parts in each of which a constant frequency occurs successively and zero-signal parts each of which has been demagnetized to a state of zero-magnetization, and the total magnetization of the burst field is made approximately 0. The zero signal portions are formed by shutting off a write current at a time during an operation to record servo patterns on a disk initialized to a state of zero-magnetization. The total magnetization of all servo patterns is made approximately 0 by encoding an address mark field and a track code field of servo patterns by a phase shift method.
摘要翻译： 本发明的实施例提供了用于垂直磁记录方法的最佳伺服模式。 在一个实施例中，伺服模式的脉冲串区域由突发信号部分组成，其中每个脉冲串信号部分连续出现恒定频率，零信号部分已经被去磁到零磁化状态，并且总磁化强度 脉冲串区域被制成大约0.零信号部分是通过在操作期间的一个时刻关闭写入电流来形成的，以便在初始化为零磁化的状态的盘上记录伺服模式。 通过相移法对伺服模式的地址标记场和轨迹代码域进行编码，使所有伺服模式的总磁化大致为0。
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公开(公告)号：US06950268B2
公开(公告)日：2005-09-27
申请号：US10358889
申请日：2003-02-06
CPC分类号： G11B5/59627
摘要： In a disk drive, since high-frequency repeatable runout (RRO) components own low correlative relationships between adjoining tracks, a servo control system of a magnetic head is followed to the high-frequency RRO components, and thus, in the worst case, there is a possibility that data which have been previously recorded on these tracks are destroyed. To avoid this problem, both a tracking type repetitive control unit which is followed to low-frequency RRO components, and a rejection type repetitive control unit which cancels the high-frequency RRO components are provided in a following control loop in order that the following control system is not unnecessarily followed to the high-frequency RRO.
摘要翻译： 在磁盘驱动器中，由于高频重复跳动（RRO）组件在邻接轨道之间具有低的相关关系，所以遵循高频RRO分量的磁头伺服控制系统，因此在最坏的情况下 以前记录在这些轨道上的数据被破坏的可能性。 为了避免这个问题，在随后的控制循环中提供了跟随低频RRO分量的跟踪型重复控制单元和抵消高频RRO分量的拒绝型重复控制单元，以便以下控制 系统没有不必要地遵循高频RRO。
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公开(公告)号：US20050201003A1
公开(公告)日：2005-09-15
申请号：US11129283
申请日：2005-05-16
CPC分类号： G11B21/106 , G11B5/59627
摘要： In order to achieve narrow track pitch by measuring, storing and compensating common average values for repeatable runout components between adjacent tracks in a head positioning control system for a magnetic disk drive, there are provided: means for calculating a compensated signal for the average value of the repeatable runout of each servo sector of at least two tracks of servo information reproduced from a magnetic disk, on the basis of an inverse function of the sensitivity characteristics of the tracking control system; means for storing the calculated signal; and means for compensating the servo signal on the basis of this signal.
摘要翻译： 为了通过测量，存储和补偿用于磁盘驱动器的磁头定位控制系统中的相邻轨道之间的可重复跳动分量的共同平均值来实现窄轨道间距，提供：用于计算补偿信号的平均值的装置 基于跟踪控制系统的灵敏度特性的反函数，从磁盘再现的至少两个伺服信息轨迹的每个伺服扇区的可重复跳动; 用于存储所计算的信号的装置; 以及用于基于该信号来补偿伺服信号的装置。
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公开(公告)号：US07474493B2
公开(公告)日：2009-01-06
申请号：US10701593
申请日：2003-11-06
IPC分类号： G11B5/596
CPC分类号： G11B5/59655
摘要： The invention provides a servo pattern that is stable for long time, easily writable, and excellent in S/N. DC-signal area included in a burst area of a servo pattern comprises combination of positive and negative DC-signals, low-density dummy bit, or pattern having phases that are deviated each other so that the sum of magnetization of the burst area of the servo pattern is equalized to 0.
摘要翻译： 本发明提供了长时间稳定，易于写入且S / N优异的伺服图形。 包括在伺服模式的脉冲串区域中的DC信号区域包括正和负DC信号的组合，低密度虚拟位或具有彼此偏离的相位的模式，使得 伺服模式等于0。
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