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1.发明授权Dual-stage actuator disk drive with secondary actuator failure detection and recovery using relative-position signal 失效双级执行器磁盘驱动器，辅助执行器故障检测和恢复使用相对位置信号公开(公告)号：US07072134B1
公开(公告)日：2006-07-04
申请号：US11051392
申请日：2005-02-03
IPC分类号： G11B5/02
CPC分类号： G11B5/5552
摘要： A dual-stage actuator disk drive uses a secondary-actuator failure-detection and calibration test run by the servo control processor and a relative-position sensor for measuring the position of the secondary actuator relative to its neutral position in response to the calibration test. The secondary-actuator failure detection and calibration test can be performed on a regular schedule or at selected times, such as at disk drive start-up. With the primary actuator biased at a test location, such as a crash stop or a load/unload ramp, the servo control processor generates a test signal to the secondary actuator and receives a relative-position signal (RPS) from the relative-position sensor in response to the test signal. The test comprises two measurements: a measurement of the secondary actuator static characteristics, and a measurement of the secondary actuator dynamic characteristics.
摘要翻译： 双级致动器盘驱动器使用由伺服控制处理器和相对位置传感器执行的二次执行器故障检测和校准测试，用于响应于校准测试来测量辅助执行器相对于其中性位置的位置。 二次执行器故障检测和校准测试可以按照时间表或选定的时间进行，例如在磁盘驱动器启动时执行。 当主执行器偏置在测试位置（例如碰撞停止或装载/卸载斜坡）时，伺服控制处理器向次级致动器产生测试信号，并从相对位置传感器接收相对位置信号（RPS） 响应测试信号。 该测试包括两个测量：次级致动器静态特性的测量以及辅助致动器动态特性的测量。
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2.发明授权Method for secondary-actuator failure detection and recovery in a dual-stage actuator disk drive 有权二级执行器磁盘驱动器中二次执行器故障检测和恢复的方法公开(公告)号：US07106552B2
公开(公告)日：2006-09-12
申请号：US11051432
申请日：2005-02-03
IPC分类号： G11B5/596
CPC分类号： G11B5/5552
摘要： A method for secondary-actuator failure-detection and recovery in a dual-stage actuator disk drive includes running a calibration test by the servo control processor and measuring the position of the secondary actuator relative to its neutral position in response to the calibration test. The secondary-actuator failure detection and calibration test can be performed on a regular schedule or at selected times, such as at disk drive start-up. With the primary actuator biased at a test location, such as a crash stop or a load/unload ramp, the servo control processor generates a test signal to the secondary actuator and receives a relative-position signal (RPS) from the relative-position sensor in response to the test signal. The test comprises two measurements: a measurement of the secondary actuator static characteristics, and a measurement of the secondary actuator dynamic characteristics.
摘要翻译： 在双级致动器盘驱动器中用于二次执行器故障检测和恢复的方法包括响应于校准测试，通过伺服控制处理器执行校准测试并相对于其中性位置测量次级致动器的位置。 二次执行器故障检测和校准测试可以按照时间表或选定的时间进行，例如在磁盘驱动器启动时执行。 当主执行器偏置在测试位置（例如碰撞停止或装载/卸载斜坡）时，伺服控制处理器向次级致动器产生测试信号，并从相对位置传感器接收相对位置信号（RPS） 响应测试信号。 该测试包括两个测量：次级致动器静态特性的测量以及辅助致动器动态特性的测量。
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3.发明授权Disk drive with capacitance sensing of disk vibration and feedforward control for removal of read/write head track misregistration 失效磁盘驱动器具有磁盘振动和前馈控制的电容感测，用于去除读/写磁头轨迹重合失调公开(公告)号：US07012777B1
公开(公告)日：2006-03-14
申请号：US10956908
申请日：2004-09-30
申请人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
发明人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
IPC分类号： G11B5/596
CPC分类号： G11B5/00 , G11B5/59627
摘要： A data recording disk drive has a plurality of capacitive sensors, each sensor facing a surface of an associated disk, a capacitance sensing circuit for converting the sensed capacitance to a voltage representative of the distance between the sensor and the disk surface, and a feedforward controller that receives the voltage signal. The feedforward controller has a transfer function with gain and phase characteristics designed to match the transfer function from the out-of-plane disk vibration to the position of the read/write head while accounting for the effects of the sensor dynamics and the dynamics of the actuator. The output from the feedforward controller is combined with the output from the disk drive's servo feedback controller so that the effects of disk vibration on track misregistration of the head are removed from the control signal to the actuator.
摘要翻译： 数据记录盘驱动器具有多个电容传感器，每个传感器面对相关盘的表面，用于将检测到的电容转换为表示传感器和盘表面之间的距离的电压的电容感测电路，以及前馈控制器 接收电压信号。 前馈控制器具有传递函数，其增益和相位特性被设计成将传播函数从平面外盘振动到读/写头的位置相匹配，同时考虑到传感器动力学和动力学的影响 执行器。 来自前馈控制器的输出与磁盘驱动器的伺服反馈控制器的输出相结合，使得磁盘振动对磁头的磁道重合失调的影响从控制信号中移除到执行机构。
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公开(公告)号：US07450335B2
公开(公告)日：2008-11-11
申请号：US11502069
申请日：2006-08-09
申请人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
发明人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B5/6017
摘要： Methods and systems for reducing read/write head track misregistration are described. According to one embodiment, a first signal is received from a first capacitive sensor that faces a surface of a disk associated with a disk drive. A second signal is received from a second capacitive sensor that faces the surface of the disk. A determination is made as to whether the disk is being moved along its axis of rotation or whether the disk is tilting. Read/write head track misregistration is reduced based on the determination of whether the disk drive is being moved along an axis of rotation or whether the disk is tilting.
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5.发明授权Dual-stage actuator disk drive with optimal location of the movable portion of the secondary actuator 有权双级致动器盘驱动器，其具有次级致动器的可动部分的最佳位置公开(公告)号：US07277258B2
公开(公告)日：2007-10-02
申请号：US11158445
申请日：2005-06-21
申请人： Toshiki Hirano , Fu-Ying Huang , Tetsuo Semba , Matthew T. White
发明人： Toshiki Hirano , Fu-Ying Huang , Tetsuo Semba , Matthew T. White
CPC分类号： G11B5/5552
摘要： A dual-stage actuator disk drive has both a rotary primary actuator and a rotary secondary actuator. When the primary actuator initiates a seek there are two torque components acting on the center of mass of the secondary actuator's moving portion. The center of rotation of the moving portion is located at an optimal location relative to the center of mass of the moving portion, which results in cancellation of the two torque components and a secondary actuator that has essentially no resonant frequency in response to a seek by the primary actuator. If the optimal location can not be achieved because of assembly tolerances, then the center of rotation is placed at a distance at least as great as the assembly tolerance from the optimal location.
摘要翻译： 双级致动器盘驱动器具有旋转主执行器和旋转次级致动器。 当主执行器启动寻道时，存在作用在辅助致动器的移动部分的质心的两个扭矩分量。 移动部分的旋转中心位于相对于移动部分的质心的最佳位置，这导致两个扭矩分量的消除，以及二次致动器，其基本上没有响应于寻道的共振频率 主执行器。 如果由于组装公差而无法实现最佳位置，则旋转中心的距离至少与最佳位置的组装公差一样大。
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6.发明授权Disk drive with support structure for air dams and disk-vibration capacitive sensors 失效磁盘驱动器，具有气坝和磁盘振动电容传感器的支撑结构公开(公告)号：US07499243B2
公开(公告)日：2009-03-03
申请号：US11835309
申请日：2007-08-07
申请人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
发明人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
IPC分类号： G11B33/14
CPC分类号： G11B5/58 , G11B5/5582 , G11B5/596 , G11B33/08
摘要： A data recording disk drive has one or more capacitive sensors for sensing out-of-plane vibration of the disk or disks. The sensors are attached to a support structure that is attached to the disk drive housing. Each sensor is associated with a disk and faces a surface of the disk near the outer perimeter of the disk and close to the recording head. The support structure can be made of a metal or a high-strength plastic and can be a separate structure mounted to the housing, or integrated as part of the single-piece housing casting. If it is metallic, as would be the case if it were integrated with the housing, then layers of insulating material separate the sensors from the support structure. A support structure that serves other functions in the disk drive, such as a support for air dams that extend between the disks, can also function as the support structure for the capacitive sensors.
摘要翻译： 数据记录磁盘驱动器具有用于感测盘或盘的平面外振动的一个或多个电容传感器。 传感器连接到附接到磁盘驱动器外壳的支撑结构。 每个传感器与磁盘相关联并且面对靠近盘的外周边的盘的表面并且靠近记录头。 支撑结构可以由金属或高强度塑料制成，并且可以是安装到壳体的单独结构，或者作为单件式外壳铸件的一部分集成。 如果是金属的，如果将其与外壳结合在一起，则绝缘材料层将传感器与支撑结构分开。 用于磁盘驱动器中的其他功能的支撑结构（例如在盘之间延伸的气坝的支撑）也可以用作电容式传感器的支撑结构。
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7.发明授权Disk drive with support structure for damping plates and disk-vibration capacitive sensors 失效磁盘驱动器，具有用于阻尼板和盘式振动电容传感器的支撑结构公开(公告)号：US07450339B2
公开(公告)日：2008-11-11
申请号：US11835276
申请日：2007-08-07
申请人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
发明人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
IPC分类号： G11B33/14
CPC分类号： G11B5/58 , G11B5/5582 , G11B5/596 , G11B33/08
摘要： A data recording disk drive has one or more capacitive sensors for sensing out-of-plane vibration of the disk or disks. The sensors are attached to a support structure that is attached to the disk drive housing. Each sensor is associated with a disk and faces a surface of the disk near the outer perimeter of the disk and close to the recording head. The support structure can be made of a metal or a high-strength plastic and can be a separate structure mounted to the housing, or integrated as part of the single-piece housing casting. If it is metallic, as would be the case if it were integrated with the housing, then layers of insulating material separate the sensors from the support structure. A support structure that serves other functions in the disk drive, such as support for disk damping plates, can also function as the support structure for the capacitive sensors.
摘要翻译： 数据记录磁盘驱动器具有用于感测盘或盘的平面外振动的一个或多个电容传感器。 传感器连接到附接到磁盘驱动器外壳的支撑结构。 每个传感器与磁盘相关联并且面对靠近盘的外周边的盘的表面并且靠近记录头。 支撑结构可以由金属或高强度塑料制成，并且可以是安装到壳体的单独结构，或者作为单件式外壳铸件的一部分集成。 如果是金属的，如果将其与外壳结合在一起，则绝缘材料层将传感器与支撑结构分开。 用于磁盘驱动器中的其他功能的支撑结构，例如对磁盘阻尼板的支持，也可以用作电容式传感器的支撑结构。
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公开(公告)号：US20080037155A1
公开(公告)日：2008-02-14
申请号：US11502069
申请日：2006-08-09
申请人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
发明人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
CPC分类号： G11B5/59627 , G11B5/6017
摘要： Methods and systems for reducing read/write head track misregistration are described. According to one embodiment, a first signal is received from a first capacitive sensor that faces a surface of a disk associated with a disk drive. A second signal is received from a second capacitive sensor that faces the surface of the disk. A determination is made as to whether the disk is being moved along its axis of rotation or whether the disk is tilting. Read/write head track misregistration is reduced based on the determination of whether the disk drive is being moved along an axis of rotation or whether the disk is tilting.
摘要翻译： 描述了用于减少读/写磁头轨迹重合失调的方法和系统。 根据一个实施例，从面对与磁盘驱动器相关联的盘的表面的第一电容传感器接收第一信号。 从面向盘表面的第二电容传感器接收第二信号。 确定盘是否沿其旋转轴线移动或盘是否倾斜。 基于确定磁盘驱动器是沿着旋转轴移动还是旋转的磁盘是否被读取/写入磁头轨迹重合不足。
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9.发明授权公开(公告)号：US07292407B2
公开(公告)日：2007-11-06
申请号：US10956919
申请日：2004-09-30
申请人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
发明人： Toshiki Hirano , Tetsuo Semba , Matthew T. White
CPC分类号： G11B5/58 , G11B5/5582 , G11B5/596 , G11B33/08
摘要： A data recording disk drive has one or more capacitive sensors for sensing out-of-plane vibration of the disk or disks. The sensors are attached to a support structure that is attached to the disk drive housing. Each sensor is associated with a disk and faces a surface of the disk near the outer perimeter of the disk and close to the recording head. The support structure can be made of a metal or a high-strength plastic and can be a separate structure mounted to the housing, or integrated as part of the single-piece housing casting. If it is metallic, as would be the case if it were integrated with the housing, then layers of insulating material separate the sensors from the support structure. A support structure that serves other functions in the disk drive can also function as the support structure for the capacitive sensors.
摘要翻译： 数据记录磁盘驱动器具有用于感测盘或盘的平面外振动的一个或多个电容传感器。 传感器连接到附接到磁盘驱动器外壳的支撑结构。 每个传感器与磁盘相关联并且面对靠近盘的外周边的盘的表面并且靠近记录头。 支撑结构可以由金属或高强度塑料制成，并且可以是安装到壳体的单独结构，或者作为单件式外壳铸件的一部分集成。 如果是金属的，如果将其与外壳结合在一起，则绝缘材料层将传感器与支撑结构分开。 用于磁盘驱动器中的其他功能的支撑结构也可以用作电容式传感器的支撑结构。
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10.发明申请公开(公告)号：US20060171062A1
公开(公告)日：2006-08-03
申请号：US11051432
申请日：2005-02-03
申请人： Toshiki Hirano , Matthew White , Satoshi Yamamoto
发明人： Toshiki Hirano , Matthew White , Satoshi Yamamoto
IPC分类号： G11B5/596
CPC分类号： G11B5/5552
摘要： A method for secondary-actuator failure-detection and recovery in a dual-stage actuator disk drive includes running a calibration test by the servo control processor and measuring the position of the secondary actuator relative to its neutral position in response to the calibration test. The secondary-actuator failure detection and calibration test can be performed on a regular schedule or at selected times, such as at disk drive start-up. With the primary actuator biased at a test location, such as a crash stop or a load/unload ramp, the servo control processor generates a test signal to the secondary actuator and receives a relative-position signal (RPS) from the relative-position sensor in response to the test signal. The test comprises two measurements: a measurement of the secondary actuator static characteristics, and a measurement of the secondary actuator dynamic characteristics.
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