Random number generation using back electromotive force (BEMF) values
    31.
    发明申请
    Random number generation using back electromotive force (BEMF) values 有权
    使用反电动势(BEMF)值的随机数生成

    公开(公告)号:US20070195448A1

    公开(公告)日:2007-08-23

    申请号:US11356499

    申请日:2006-02-17

    IPC分类号: G11B21/02

    CPC分类号: G06F7/588

    摘要: Method and apparatus for generating a random number, such as for use in a security protocol to control access to a data processing system. A processor generates the random number in relation to a back electromotive force (BEMF) value. The BEMF value is preferably obtained in response to application of current to a circuit. The circuit preferably comprises a coil and the application of current preferably induces a relatively small movement of the coil. The random number is preferably a multi-bit digital value, and each bit of the random number is determined in relation to whether the corresponding BEMF value is even or odd. The coil preferably comprises a coil of a voice coil motor (VCM) used to position a transducer adjacent a rotatable storage medium, and the random number is preferably generated while the medium is in a non-rotatable state.

    摘要翻译: 用于生成随机数的方法和装置,例如用于安全协议中以控制对数据处理系统的访问。 处理器产生与反电动势(BEMF)值相关的随机数。 优选地,响应于电流施加到电路而获得BEMF值。 电路优选地包括线圈,并且电流的施加优选地引起线圈的相对小的运动。 随机数优选为多位数字值,并且相关于相应的BEMF值是偶数还是奇数来确定随机数的每个位。 线圈优选地包括用于将换能器邻近可旋转存储介质定位的音圈电机(VCM)的线圈,并且优选地在介质处于不可旋转状态时产生随机数。

    Data storage medium with optimized servo format
    32.
    发明申请
    Data storage medium with optimized servo format 有权
    具有优化伺服格式的数据存储介质

    公开(公告)号:US20070064325A1

    公开(公告)日:2007-03-22

    申请号:US11231960

    申请日:2005-09-21

    IPC分类号: G11B5/09 G11B5/596

    CPC分类号: G11B5/59655

    摘要: A data storage medium and data storage system with improved efficiency of formatting are provided. One illustrative embodiment of the present invention pertains to a data storage medium. The data storage medium includes a first zone having servo information written with a first frequency, a second zone having servo information written with a second frequency, and a guard band disposed between the first zone and the second zone. The use of different frequencies in different zones contributes to optimizing the properties of the data storage medium, and the guard band contributes to optimizing the usage of the different zones.

    摘要翻译: 提供了提供格式化效率的数据存储介质和数据存储系统。 本发明的一个说明性实施例涉及数据存储介质。 数据存储介质包括具有以第一频率写入的伺服信息的第一区,具有以第二频率写入的伺服信息的第二区和设置在第一区和第二区之间的保护带。 在不同区域中使用不同的频率有助于优化数据存储介质的属性,并且保护带有助于优化不同区域的使用。

    System and method to minimize bearing pivot effect in disc drive actuator
    34.
    发明授权
    System and method to minimize bearing pivot effect in disc drive actuator 有权
    减少驱动器驱动器轴承枢轴效应的系统和方法

    公开(公告)号:US06606214B1

    公开(公告)日:2003-08-12

    申请号:US09605155

    申请日:2000-06-28

    IPC分类号: G11B5596

    CPC分类号: G11B5/596 G11B5/5521

    摘要: A disc drive is provided which incorporates a rotatable actuator which is mounted to a base of the disc drive through a pivot mechanism. The actuator positioning is controlled by a servo system and during track following operations, the actuator arm is caused to move. In one embodiment, the servo tracks incorporated in the disc drive are distorted when written in by the injection of a sinusoidal signal. In another form, the disc containing the servo information is caused to rotate about an axis which is offset from the disc axis. A method of creating a servo track is also disclosed.

    摘要翻译: 提供了一种盘驱动器,其包括可旋转的致动器,其通过枢转机构安装到盘驱动器的基座。 执行器定位由伺服系统控制,并且在跟踪操作期间,使致动器臂移动。 在一个实施例中,当通过注入正弦信号写入时,并入磁盘驱动器中的伺服磁道失真。 在另一种形式中,使包含伺服信息的盘围绕与盘轴偏移的轴线旋转。 还公开了一种创建伺服轨道的方法。

    Integrated test system for a disc drive pivot bearing and actuator
    35.
    发明授权
    Integrated test system for a disc drive pivot bearing and actuator 失效
    盘式驱动枢轴轴承和执行器的集成测试系统

    公开(公告)号:US06453722B1

    公开(公告)日:2002-09-24

    申请号:US09330938

    申请日:1999-06-11

    IPC分类号: G11B2102

    摘要: Disclosed is a method and apparatus for determining the dynamic characteristics of a desired component of an actuator assembly. Further, said method and apparatus are capable of determining the dynamic characteristics independent of any drive servo electronics. The system and method can also be used to determine other operating parameters such as rotational inertia. This information is useful for design verification, quality assurance and failure analysis.

    摘要翻译: 公开了一种用于确定致动器组件的期望部件的动态特性的方法和装置。 此外,所述方法和装置能够独立于任何驱动伺服电子装置来确定动态特性。 系统和方法也可用于确定其他操作参数,如转动惯量。 此信息对于设计验证,质量保证和故障分析很有用。

    Apparatus for isolating vibration in pivot bearing assemblies
    36.
    发明授权
    Apparatus for isolating vibration in pivot bearing assemblies 有权
    用于隔离枢转轴承组件中的振动的装置

    公开(公告)号:US06256173B1

    公开(公告)日:2001-07-03

    申请号:US09330420

    申请日:1999-06-11

    IPC分类号: G11B555

    摘要: An apparatus for isolating vibration in pivot bearing assemblies that is incorporated in a standard pivot bearing assembly without requiring modification of the pivot bearing assembly. Washers are used between the pivot bearing assembly and the base plate of a disc drive upon which the assembly is mounted. In addition, a second washer is positioned on the shaft of the assembly and is held in place by a shoulder screw which fastens the assembly to the base plate.

    摘要翻译: 用于隔离枢转轴承组件中的振动的装置,该装置结合在标准枢转轴承组件中,而不需要改变枢转轴承组件。 在枢转轴承组件和安装组件的盘驱动器的基板之间使用垫圈。 此外,第二垫圈定位在组件的轴上,并通过将组件固定到基板的肩部螺钉保持就位。

    DIRECTING WINDAGE ESTABLISHED BY A ROTATING DISC
    38.
    发明申请
    DIRECTING WINDAGE ESTABLISHED BY A ROTATING DISC 审中-公开
    由旋转盘建立的导向风

    公开(公告)号:US20110286131A1

    公开(公告)日:2011-11-24

    申请号:US12783482

    申请日:2010-05-19

    IPC分类号: G11B17/32 F04D23/00

    CPC分类号: G11B33/148

    摘要: An apparatus and associated method for directing windage involves a body defining an aperture. A fastener is operably disposed in the aperture and is selectively engageable with a fixed support member between a first mode permitting rotation of the body around the fastener longitudinal axis, and a second mode affixing the body in place to the support member at a desired rotational orientation. A shroud depends from the body and is sized at a distal end for an operable mating relationship adjacent an arcuate edge of a disc that is rotatable around a disc axis. The shroud distal end is operably disposed a first distance from the fastener longitudinal axis in a direction of a plane including the fastener longitudinal axis and the disc axis. A leading edge of the shroud, with respect to a direction of windage established by disc rotation, is disposed a second distance from the fastener longitudinal axis that is the same or less than the first distance from the fastener longitudinal axis.

    摘要翻译: 用于引导风阻的装置和相关联的方法涉及限定孔的主体。 紧固件可操作地设置在孔中,并且可以在允许主体围绕紧固件纵向轴线的旋转的第一模式之间选择性地与固定支撑构件接合,以及将主体以期望的旋转方向固定到支撑构件的第二模式 。 护罩从身体取向并且在远端处被定尺寸,用于邻近可围绕盘轴线旋转的盘的弓形边缘的可操作的配合关系。 护罩远端在包括紧固件纵向轴线和椎间盘轴线的平面的方向上可操作地设置在紧固件纵向轴线的第一距离处。 相对于通过盘旋转建立的风向的方向,护罩的前缘设置在与紧固件纵向轴线相距或小于紧固件纵向轴线的第一距离的第二距离处。

    Multi-axis vibration method and apparatus
    39.
    发明授权
    Multi-axis vibration method and apparatus 有权
    多轴振动法及装置

    公开(公告)号:US07891249B2

    公开(公告)日:2011-02-22

    申请号:US11832423

    申请日:2007-08-01

    IPC分类号: B06B3/00

    CPC分类号: G01M7/027

    摘要: A vibration test apparatus is disclosed. The vibration test apparatus includes a platform assembly, which receives a vibration input from a vibration source and imparts a multi-axial vibration to a test specimen on the platform assembly. In illustrated embodiments the platform assembly includes one or more platforms having an adjustable incline angle. The incline angle is adjusted to provide the desired output vibration based upon a measured or determined vibration profile and the input vibration from the vibration source.

    摘要翻译: 公开了一种振动试验装置。 振动试验装置包括平台组件,其接收来自振动源的振动输入并向平台组件上的试样施加多轴向振动。 在所示实施例中,平台组件包括具有可调节倾斜角度的一个或多个平台。 根据测量或确定的振动分布和来自振动源的输入振动,调整倾斜角以提供所需的输出振动。

    Overlapping data track access
    40.
    发明授权
    Overlapping data track access 有权
    重叠数据跟踪访问

    公开(公告)号:US07417813B2

    公开(公告)日:2008-08-26

    申请号:US10854303

    申请日:2004-05-26

    IPC分类号: G11B27/36

    CPC分类号: G11B27/36 G11B2220/20

    摘要: A data recording apparatus includes a surface having a plurality of data tracks with leading track portions. A head moves along head paths over the data tracks to provide data access. The data access has a reduced reliability along a limited number of the leading track portions. Trailing path additions follow the head paths for the limited number of leading track portions. The trailing path additions providing overlapping data access for the limited number of leading track portions.

    摘要翻译: 一种数据记录装置,包括具有带导轨部分的多个数据轨道的表面。 磁头沿数据轨道的头部路径移动以提供数据访问。 数据访问沿着有限数量的引导轨道部分具有​​降低的可靠性。 跟踪路径追加跟随有限数量的导轨部分的头部路径。 拖尾路径添加为有限数量的导轨部分提供重叠的数据访问。