公开(公告)号：EP1643488A2

公开(公告)日：2006-04-05

申请号：EP05104636.5

申请日：2005-05-30

申请人： Hitachi Global Storage Technologies B. V.

发明人： Hirano, Toshiki ,  Semba, Tetsuo ,  White, Matthew T.

IPC分类号： G11B5/00

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 它接收电压信号。 前馈控制器具有传递函数，其增益和相位特性被设计为将传递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。

公开(公告)号：EP1643488A3

公开(公告)日：2007-08-08

申请号：EP05104636.5

申请日：2005-05-30

申请人： Hitachi Global Storage Technologies B. V.

发明人： Hirano, Toshiki ,  Semba, Tetsuo ,  White, Matthew T.

IPC分类号： G11B5/55

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，每个传感器面向相关盘的表面，电容传感电路，用于将传感电容转换为代表传感器和盘表面之间距离的电压，以及前馈控制器 接收电压信号。 前馈控制器具有增益和相位特性的传递函数，该传递函数被设计为与来自面外盘振动的传递函数匹配到读/写头的位置，同时考虑到传感器动态特性的影响以及 执行器。 来自前馈控制器的输出与来自磁盘驱动器的伺服反馈控制器的输出相结合，以便从控制信号中将磁盘振动对磁头轨道定位不良的影响从执行器中去除。

公开(公告)号：EP1643488B1

公开(公告)日：2009-01-07

申请号：EP05104636.5

申请日：2005-05-30

申请人： Hitachi Global Storage Technologies B. V.

发明人： Hirano, Toshiki ,  Semba, Tetsuo ,  White, Matthew T.

IPC分类号： G11B5/55

CPC分类号： G11B5/00 ,  G11B5/59627

公开(公告)号：EP1643500A3

公开(公告)日：2007-10-17

申请号：EP05105152.2

申请日：2005-06-13

申请人： Hitachi Global Storage Technologies B. V.

发明人： Hirano, Toshiki ,  Semba, Tetsuo ,  White, Matthew T.

IPC分类号： G11B19/02 ,  G11B5/596 ,  G11B5/55

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.

公开(公告)号：EP1643500A2

公开(公告)日：2006-04-05

申请号：EP05105152.2

申请日：2005-06-13

申请人： Hitachi Global Storage Technologies B. V.

发明人： Hirano, Toshiki ,  Semba, Tetsuo ,  White, Matthew T.

IPC分类号： G11B19/02

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式传感器。 传感器连接到附接到磁盘驱动器壳体的支撑结构。 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上的单独结构，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持结构也可以用作电容式传感器的支持结构。