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    • 51. 发明授权
    • Method and apparatus of dual stage servo control for track following in a hard disk drive
    • 用于在硬盘驱动器中跟踪的双级伺服控制的方法和装置
    • US07009803B2
    • 2006-03-07
    • US10886171
    • 2004-07-06
    • Vinod SharmaHyung Jai LeeDong Jun Lee
    • Vinod SharmaHyung Jai LeeDong Jun Lee
    • G11B5/596
    • G11B5/5552G11B5/596
    • The invention operates two control paths. The micro-actuator control stimulates the micro-actuator. The voice coil motor control path includes the voice coil motor control generating a voice coil control signal, notch filtered to remove at least one significant excitation resonance for a notch filtered voice coil control signal. Amplifying the notch filtered voice coil control signal by a tuning gain stimulates the voice coil motor.A decoupling feedback filter uses the micro-actuator control signal to create a decoupling feedback signal used to decouple the two control paths. A track following command, with PES removed, directs the micro-actuator control. The voice coil motor control is directed by the track following command, with both PES and decoupling feedback signal removed.Preferably, the servo-controller digitally supports the elements of the invention. Implementing the method may preferably include the servo-controller program system residing in an accessibly coupled memory.The invention includes optimizing an implementation within the hard disk drive. The optimization may be part of the manufacturing process for the hard disk drive. The invention includes the hard disk drive as the product of that manufacturing process.
    • 本发明操作两个控制路径。 微致动器控制激励微致动器。 音圈电机控制路径包括产生音圈控制信号的音圈电机控制信号,对陷波滤波音圈控制信号进行陷波滤波以去除至少一个重要的激励谐振。 通过调谐增益放大陷波滤波的音圈控制信号可以刺激音圈电机。 去耦反馈滤波器使用微致动器控制信号来产生用于去耦合两个控制路径的去耦反馈信号。 一个跟踪命令,取消了PES,指示微执行器控制。 音圈电机控制由跟踪跟踪命令指导,PES和去耦反馈信号都消除。 优选地,伺服控制器以数字方式支持本发明的元件。 实施该方法可以优选地包括驻留在可访问耦合的存储器中的伺服控制器程序系统。 本发明包括优化硬盘驱动器内的实现。 优化可能是硬盘驱动器的制造过程的一部分。 本发明包括硬盘驱动器作为该制造过程的产物。
    • 60. 发明授权
    • Implantable medical device having optical fiber for sensing electrical activity
    • 具有用于感测电活动的光纤的可植入医疗装置
    • US08396539B2
    • 2013-03-12
    • US11676128
    • 2007-02-16
    • Vinod SharmaXiaohong Zhou
    • Vinod SharmaXiaohong Zhou
    • A61B5/04
    • A61B5/0071A61B5/0084A61B5/0452
    • An implantable medical device for optically sensing action potential signals in excitable body tissue. The device includes an elongated tubular lead body carrying an optical fiber extending from a proximal lead end to a distal lead end to position the optical fiber at a target site. The lead body additionally carries a conduit for dispensing a voltage-sensitive fluorescent dye into tissue surrounding the target site. The optical fiber transmits excitation light to the fluorescent dye to cause the dye to fluoresce with varying intensity as the transmembrane potentials of local tissue cells vary due to passing depolarization wavefronts. The optical fiber transmits the fluorescence signal to the device to generate an action potential signal or fiducial points of an action potential signal for use in accurately measuring and characterizing electrical activity of excitable tissue.
    • 一种用于在可兴奋的身体组织中光学感测动作电位信号的可植入医疗装置。 该装置包括细长的管状引线体,其承载从近侧引线端延伸到远端引线端的光纤,以将光纤定位在目标部位。 引线体还带有用于将电压敏感的荧光染料分配到靶区域周围的组织中的导管。 光纤将激发光透射到荧光染料,以使得染料以不同的强度发荧光,因为局部组织细胞的跨膜电位由于通过去极化波前而变化。 光纤将荧光信号传输到设备以产生动作电位信号或动作电位信号的基准点,用于精确测量和表征可兴奋组织的电活动。