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1. 发明授权

US5825579A Disk drive servo sensing gain normalization and linearization 失效
标题翻译：磁盘驱动器伺服检测增益归一化和线性化
公开(公告)号：US5825579A
公开(公告)日：1998-10-20
申请号：US628217
申请日：1996-04-04
申请人： Wayne Leung Cheung , Donald L. Clare , Louis Joseph Serrano
发明人： Wayne Leung Cheung , Donald L. Clare , Louis Joseph Serrano
IPC分类号： G11B5/55 , G11B5/596
CPC分类号： G11B5/5552 , G11B5/59633
摘要： An apparatus, system and method are described for generating a continuous and linear position signal generated from stitched position error signal (PES) components, for use by a servo control system in positioning a transducer with respect to a storage surface. Continuity is achieved by providing a normalization stage in the servo control loop for correcting discontinuities at the stitch points with minimal impact to the PES zero-crossing points. According to a first preferred embodiment normalization is applied using an algorithm determined by the width of the read transducer. According to a second preferred embodiment, normalization is selectively applied near the stitch points of the PES components, but is not applied at their zero-crossing points. In another preferred embodiment, a first normalization algorithm is applied near the stitch points, and a second normalization algorithm is applied at the zero-crossing points. In a fourth embodiment, a smoothing function is applied between the stitch points and zero-crossings to smooth the transition from normalized to unnormalized signal contributions or from signal contributions normalized in a first manner to signal contributions normalized in a second manner. A further aspect of the present invention is to determine whether the PES exceeds a nominal value and if so, to hold the PES at the nominal value at each stitch point.
摘要翻译：描述了一种用于产生从缝合位置误差信号（PES）分量产生的连续和线性位置信号的装置，系统和方法，供伺服控制系统在相对于存储表面定位换能器时使用。通过在伺服控制回路中提供归一化阶段来实现连续性，以在针对PES过零点的影响最小的情况下对针迹点的不连续性进行校正。根据第一优选实施例，使用由读换能器的宽度确定的算法来应用归一化。根据第二优选实施例，在PES部件的针迹点附近选择性地施加归一化，但是不在它们的过零点施加归一化。在另一个优选实施例中，在缝合点附近施加第一归一化算法，并且在过零点应用第二归一化算法。在第四实施例中，在缝合点和过零点之间施加平滑函数，以平滑从归一化到非归一化信号贡献的转换或者以第一方式归一化为以第二方式归一化的信号贡献的信号贡献。本发明的另一方面是确定PES是否超过标称值，如果是，则在每个针迹点处将PES保持在标称值。

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