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1. 发明授权

US08077425B2 Magnetic disk apparatus and information reproducing method 有权
标题翻译：磁盘装置和信息再现方法
公开(公告)号：US08077425B2
公开(公告)日：2011-12-13
申请号：US12542100
申请日：2009-08-17
申请人： Yasushi Tomizawa , Kohsuke Harada , Hiroaki Nakamura , Yoshiyuki Ishihara , Shinji Takakura
发明人： Yasushi Tomizawa , Kohsuke Harada , Hiroaki Nakamura , Yoshiyuki Ishihara , Shinji Takakura
IPC分类号： G11B21/02
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/02 , G11B5/743 , G11B5/746 , G11B2005/0005
摘要： A magnetic disk apparatus includes a magnetic disk that includes a plurality of zones in which a plurality of tracks are arranged for each of circumferences of a spiral, and gaps that are arranged between the zones to have a width a predetermined number of times larger than a track width and that are regions without providing recording bits; and a reproducing element that simultaneously makes an access to the recording bits contained in the tracks, reading information stored in the recording bits, wherein the number of the tracks is one or larger and a sum of one and the predetermined number or smaller in one of the zones.
摘要翻译：磁盘装置包括磁盘，该磁盘包括多个区域，其中为每个螺旋周期布置多个轨道，以及布置在该区域之间的间隙，其宽度大于一个轨道宽度，并且是不提供记录位的区域; 以及再现元件，其同时访问包含在轨道中的记录位，读取存储在记录位中的信息，其中轨道的数量是一个或者更多，并且一个和一个和之和之和小于区域。

2. 发明申请

US20090153998A1 STORAGE MEDIUM REPRODUCING APPARATUS AND STORAGE MEDIUM REPRODUCING METHOD 审中-公开
标题翻译：存储介质复制设备和存储介质复制方法
公开(公告)号：US20090153998A1
公开(公告)日：2009-06-18
申请号：US12335606
申请日：2008-12-16
申请人： Hiroaki Nakamura , Yasushi Tomizawa , Shinji Takakura , Yoshiyuki Ishihara
发明人： Hiroaki Nakamura , Yasushi Tomizawa , Shinji Takakura , Yoshiyuki Ishihara
IPC分类号： G11B20/10 , G11B5/596
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/012 , G11B5/743 , G11B5/746
摘要： A storage medium reproducing apparatus includes a storage medium that records data; a reproducing head that reads the data recorded in the storage medium; a positioning controlling unit that performs positioning control of the reproducing head with respect to tracks based on servo signals from the servo area included in the storage medium; and a reproducing processing unit that reproduces the data recorded in data area in the storage medium by reading recording dots of the data area using the reproducing head the position of which is decided on the tracks, wherein the reproducing head has a head width capable of simultaneously reading a plurality of servo dots.
摘要翻译：存储介质再现装置包括记录数据的存储介质; 读取记录在存储介质中的数据的再现头; 定位控制单元，其基于来自所述存储介质中包括的所述伺服区域的伺服信号，对所述再现头进行相对于轨迹的定位控制; 以及再现处理单元，其通过使用其位置在轨道上确定的再现头读取数据区的记录点来再现记录在存储介质中的数据区域中的数据，其中再现头具有能够同时读取多个伺服点。

3. 发明申请

US20100079910A1 MAGNETIC DISK APPARATUS AND INFORMATION REPRODUCING METHOD 有权
标题翻译：磁盘设备和信息再现方法
公开(公告)号：US20100079910A1
公开(公告)日：2010-04-01
申请号：US12542100
申请日：2009-08-17
申请人： Yasushi Tomizawa , Kohsuke Harada , Hiroaki Nakamura , Yoshiyuki Ishihara , Shinji Takakura
发明人： Yasushi Tomizawa , Kohsuke Harada , Hiroaki Nakamura , Yoshiyuki Ishihara , Shinji Takakura
IPC分类号： G11B5/127 , G11B5/82
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/02 , G11B5/743 , G11B5/746 , G11B2005/0005
摘要： A magnetic disk apparatus includes a magnetic disk that includes a plurality of zones in which a plurality of tracks are arranged for each of circumferences of a spiral, and gaps that are arranged between the zones to have a width a predetermined number of times larger than a track width and that are regions without providing recording bits; and a reproducing element that simultaneously makes an access to the recording bits contained in the tracks, reading information stored in the recording bits, wherein the number of the tracks is one or larger and a sum of one and the predetermined number or smaller in one of the zones.
摘要翻译：磁盘装置包括磁盘，该磁盘包括多个区域，其中为每个螺旋周期布置多个轨道，以及布置在该区域之间的间隙，其宽度大于一个轨道宽度，并且是不提供记录位的区域; 以及再现元件，其同时访问包含在轨道中的记录位，读取存储在记录位中的信息，其中轨道的数量是一个或者更多，并且一个和一个之和的和之和小于区域。

4. 发明授权

US08149533B2 Load/unload control method and apparatus for a magnetic disk drive 有权
标题翻译：用于磁盘驱动器的装载/卸载控制方法和装置
公开(公告)号：US08149533B2
公开(公告)日：2012-04-03
申请号：US12842850
申请日：2010-07-23
申请人： Shigen Yasunaka , Satoshi Kuwahara , Shinji Takakura , Yoshiyuki Ishihara
发明人： Shigen Yasunaka , Satoshi Kuwahara , Shinji Takakura , Yoshiyuki Ishihara
IPC分类号： G11B21/12
CPC分类号： G11B5/54 , G11B5/5534 , G11B5/5547
摘要： According to one embodiment, an estimation method comprises measuring and creating. The measuring is configured to measure a head velocity and a terminal voltage of a coil of a voice coil motor at least two times before unload in a control system eliminating an influence caused by a transient response of inductance of the voice coil motor. The calculating is configured to a calculate torque constant and a coil resistance based on command voltages and at least two measured head velocities and terminal voltages of the coil.
摘要翻译：根据一个实施例，估计方法包括测量和创建。测量被配置为在控制系统中在卸载之前测量音圈电机的线圈的头部速度和端子电压至少两次，从而消除由音圈电动机的电感的瞬态响应引起的影响。该计算被配置为基于指令电压和线圈的至少两个测量的头部速度和端子电压的计算转矩常数和线圈电阻。

5. 发明授权

US07957090B2 Seek control apparatus and method for generating control data for seek control 有权
标题翻译：寻求用于产生寻道控制的控制数据的控制装置和方法
公开(公告)号：US07957090B2
公开(公告)日：2011-06-07
申请号：US12257076
申请日：2008-10-23
申请人： Yoshiyuki Ishihara , Shinji Takakura
发明人： Yoshiyuki Ishihara , Shinji Takakura
IPC分类号： G11B5/55
CPC分类号： G11B5/5547
摘要： There is provided a method for generating acceleration data used in feed-forward control of head seeking, wherein, a seek distance and one of a seek period and the count of samples are received; a weighting factor for the change rate of acceleration between adjacent sample times is determined respectively; and an optimum acceleration at each sample time is obtained by performing an optimization calculation that minimizes an objective function under a constraint condition based on variables representing accelerations at each sample time, either the seek period or the count of samples, and the seek distance.
摘要翻译：提供了一种用于生成用于头部寻找的前馈控制中使用的加速度数据的方法，其中，寻道距离和寻道周期中的一个以及样本计数被接收; 分别确定相邻采样时间之间的加速度变化率的权重因子; 并且通过执行最优化计算来获得每个采样时间的最佳加速度，所述优化计算使得在约束条件下使目标函数最小化，所述约束条件基于在每个采样时间，即寻找周期或采样计数以及寻找距离的表示加速度的变量。

6. 发明申请

US20120281311A1 RAMP-UNLOADING SEEK CONTROL DEVICE FOR MAGNETIC DISK DRIVE 审中-公开
标题翻译：用于磁盘驱动器的RAMP-卸载SEEK控制装置
公开(公告)号：US20120281311A1
公开(公告)日：2012-11-08
申请号：US13551793
申请日：2012-07-18
申请人： Yoshiyuki Ishihara , Shinji Takakura , Shigen Yasunaka
发明人： Yoshiyuki Ishihara , Shinji Takakura , Shigen Yasunaka
IPC分类号： G11B5/55
CPC分类号： G11B5/54 , G11B21/12
摘要： A ramp-unloading seek control device includes a voice coil motor, a detector, an instruction-current detector, a head-speed computing unit, and an identification structure. The identification structure estimates an error between a true resistance value and an estimated resistance value of the voice coil motor. The identification structure can minimize an estimated error defined as a difference between an estimated value ŷ(k) of the head speed and the head speed y(k), and employs {circumflex over (b)}1 to calibrate the estimated error. {circumflex over (b)}1 is determined by minimizing the estimated error. ŷ(k) and y(k) are defined by the equation (A): ŷ(k)=−â1y(k−1)+{circumflex over (b)}0u(k−1)+{circumflex over (b)}1u(k−2) (A). y(k−1) denotes a head speed computed by the head-speed computing unit at the last sampling time. k denotes the present sampling time. u(k−1) and u(k−2) denote instruction currents at the last sampling time and the last but one sampling time, respectively. Unknown variables â1, {circumflex over (b)}0 are determined by minimizing the estimated error.
摘要翻译：斜坡卸载寻道控制装置包括音圈电动机，检测器，指令电流检测器，头速计算单元和识别结构。识别结构估计音圈马达的真实电阻值和估计电阻值之间的误差。识别结构可以最小化定义为头速度的估计值ŷ（k）与头速度y（k）之间的差的估计误差，并且采用{circumflex over（b）} 1来校准估计的误差。通过最小化估计误差来确定{（f）（1））。 ŷ（k）和y（k）由等式（A）定义：ŷ（k）= - â（k-1）+ {回旋（b）} 0u（k-1）+ { ）} 1u（k-2）（A）。 y（k-1）表示由头速计算单元在最后采样时间计算的磁头速度。 k表示当前的采样时间。 u（k-1）和u（k-2）分别表示最后采样时间和最后一个采样时间的指令电流。通过最小化估计的误差来确定未知变量â1，{（f（b）} 0）。

7. 发明授权

US09093114B2 Method for identifying high-speed frequency response of multirate system and apparatus therefor 有权
标题翻译：识别多速率系统及其装置的高速频率响应的方法
公开(公告)号：US09093114B2
公开(公告)日：2015-07-28
申请号：US13418460
申请日：2012-03-13
申请人： Yoshiyuki Ishihara , Shinji Takakura
发明人： Yoshiyuki Ishihara , Shinji Takakura
IPC分类号： G11B20/00 , G11B20/10 , G11B5/55
CPC分类号： G11B20/10009 , G11B5/5521
摘要： There is provided with a method of identifying a frequency response of a controlled object at a sampling period of control input in a multiplexed-input multirate system in which a sampling period of control output is even “P” multiples of the sampling period of control input wherein the control object is represented by FIR filter, an M-series signal corresponding to an acquisition data length Mp×P−1 is generated, the Mp indicates a period of the M-series signal, an impulse response value of the controlled object is estimated based on the M-series signal and output data outputted from the controlled object by inputting the M-series signal thereto, and the frequency response of the controlled object is identified by performing a discrete Fourier transform on the impulse response value.
摘要翻译：提供了一种在多路复用输入多速率系统中的控制输入的采样周期识别受控对象的频率响应的方法，其中控制输出的采样周期是控制输入的采样周期的偶数“P”倍数其中，控制对象由FIR滤波器表示，产生与采集数据长度Mp×P-1对应的M序列信号，Mp表示M序列信号的周期，受控对象的脉冲响应值为基于通过向其输入M系列信号而从受控对象输出的M系列信号和输出数据估计出的，并且通过对脉冲响应值执行离散付里叶变换来识别受控对象的频率响应。

8. 发明申请

US20120019955A1 HARD DISK DRIVE, METHOD FOR ESTIMATING BACK ELECTROMOTIVE FORCE, AND METHOD FOR CONTROLLING VELOCITY OF HEAD 有权
标题翻译：硬盘驱动器，用于估计反电动力的方法以及用于控制头部速度的方法
公开(公告)号：US20120019955A1
公开(公告)日：2012-01-26
申请号：US13232253
申请日：2011-09-14
申请人： Shigen Yasunaka , Shinji Takakura , Yoshiyuki Ishihara
发明人： Shigen Yasunaka , Shinji Takakura , Yoshiyuki Ishihara
IPC分类号： G11B21/02
CPC分类号： G11B5/5526 , G11B21/12
摘要： According to one embodiment, a hard disk drive includes a head, a voice coil motor, a driving circuit, an identification unit, a storage unit, and an estimation unit. The head is configured to perform write/read of information to a storage medium. The voice coil motor is configured to move the head. The driving circuit is configured to drive the voice coil motor, based on a command signal. The identification unit is configured to identify at least one parameter of a discrete-time model. The discrete-time model represents a transfer function from the command signal to a voltage drop quantity by an inductance of a coil of the voice coil motor. The storage unit is configured to store the parameter. The estimation unit is configured to estimate a back electromotive force of the coil, based on the discrete-time model including the parameter.
摘要翻译：根据一个实施例，硬盘驱动器包括头，音圈电机，驱动电路，识别单元，存储单元和估计单元。头被配置为执行向存储介质的信息的写入/读取。音圈电机被配置为移动头部。驱动电路被配置为基于命令信号来驱动音圈电机。识别单元被配置为识别离散时间模型的至少一个参数。离散时间模型表示通过音圈电机的线圈的电感从指令信号到电压降量的传递函数。存储单元被配置为存储参数。估计单元被配置为基于包括参数的离散时间模型来估计线圈的反电动势。

9. 发明申请

US20090219646A1 POSITIONING CONTROL SYSTEM AND METHOD THEREFOR 有权
标题翻译：定位控制系统及其方法
公开(公告)号：US20090219646A1
公开(公告)日：2009-09-03
申请号：US12393260
申请日：2009-02-26
申请人： Yoshiyuki Ishihara , Shinji Takakura
发明人： Yoshiyuki Ishihara , Shinji Takakura
IPC分类号： G11B21/02
CPC分类号： G11B5/59622
摘要： There is provided with a positioning control system which includes: a head moving unit configured to move a head for recording or reproducing information with respect to a disk capable of recording information; a position detecting unit configured to detect a position of the head; an error detecting unit configured to detect a position error signal of a detected head position with respect to a predetermined target position; a compensation controller configured to generate control input by performing phase lead compensation and phase delay compensation for the position error signal and supply the control input to the head moving unit; and a gain controller configured to control at least one of gains the phase lead compensation and the phase delay compensation based on frequency components contained in the position error signal and an amplitude of the position error signal.
摘要翻译：提供了一种定位控制系统，其包括：头部移动单元，被配置为相对于能够记录信息的盘移动用于记录或再现信息的头部; 位置检测单元，被配置为检测头部的位置; 错误检测单元，被配置为检测相对于预定目标位置的检测到的头位置的位置误差信号; 补偿控制器，被配置为通过对位置误差信号执行相位超前补偿和相位延迟补偿来产生控制输入，并将控制输入提供给头部移动单元; 以及增益控制器，被配置为基于位置误差信号中包含的频率分量和位置误差信号的振幅来控制相位超前补偿和相位延迟补偿的增益中的至少一个。

10. 发明授权

US08582230B2 Hard disk drive, method for estimating back electromotive force, and method for controlling velocity of head 有权
标题翻译：硬盘驱动器，用于估计反电动势的方法以及用于控制磁头速度的方法
公开(公告)号：US08582230B2
公开(公告)日：2013-11-12
申请号：US13232253
申请日：2011-09-14
申请人： Shigen Yasunaka , Shinji Takakura , Yoshiyuki Ishihara
发明人： Shigen Yasunaka , Shinji Takakura , Yoshiyuki Ishihara
IPC分类号： G11B21/02
CPC分类号： G11B5/5526 , G11B21/12
摘要： According to one embodiment, a hard disk drive includes a head, a voice coil motor, a driving circuit, an identification unit, a storage unit, and an estimation unit. The head is configured to perform write/read of information to a storage medium. The voice coil motor is configured to move the head. The driving circuit is configured to drive the voice coil motor, based on a command signal. The identification unit is configured to identify at least one parameter of a discrete-time model. The discrete-time model represents a transfer function from the command signal to a voltage drop quantity by an inductance of a coil of the voice coil motor. The storage unit is configured to store the parameter. The estimation unit is configured to estimate a back electromotive force of the coil, based on the discrete-time model including the parameter.
摘要翻译：根据一个实施例，硬盘驱动器包括头，音圈电机，驱动电路，识别单元，存储单元和估计单元。头被配置为执行向存储介质的信息的写入/读取。音圈电机被配置为移动头部。驱动电路被配置为基于命令信号来驱动音圈电机。识别单元被配置为识别离散时间模型的至少一个参数。离散时间模型表示通过音圈电机的线圈的电感从指令信号到电压降量的传递函数。存储单元被配置为存储参数。估计单元被配置为基于包括参数的离散时间模型来估计线圈的反电动势。

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