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    • 1. 发明申请
    • Information Carrier, and System for Positioning Such an Information Carrier in an Apparatus
    • 信息载体和用于在装置中定位这种信息载体的系统
    • US20070277192A1
    • 2007-11-29
    • US11568241
    • 2005-04-21
    • Robert HendriksThomas De HoogPeter Van Der Walle
    • Robert HendriksThomas De HoogPeter Van Der Walle
    • G11B7/0033
    • G11B7/0033G11B7/0938
    • The invention relates to an information carrier, and a system for positioning such an information carrier in an apparatus. This system comprises an optical element (102) for generating a periodic array of light spots (103) intended to be applied to an information carrier (101), said information carrier (101) comprising a first periodic structure (108) intended to interfere with said periodic array of light spots (103) for generating a first Moiré pattern, and a second periodic structure (109) intended to interfere with said periodic array of light spots (103) for generating a second Moiré pattern, analysis means for deriving from said first and second Moiré patterns, the angle value (S) between said periodic array of light spots (103) and said information carrier (101), and actuation means (AC1-AC2-AC3) for adjusting the angular position of said information carrier (101) with respect to said array of light spots (103), from control signals (114) derived based on said angle value (S).
    • 本发明涉及一种信息载体,以及用于将这种信息载体定位在装置中的系统。 该系统包括用于产生旨在施加到信息载体(101)的光点周期性阵列(103)的光学元件(102),所述信息载体(101)包括旨在干扰 所述周期阵列的光点(103)用于产生第一莫尔图案,以及第二周期性结构(109),其旨在干扰所述周期性阵列的光点(103)以产生第二莫尔图案,分析装置用于从所述 第一和第二莫尔图案,所述光点周期阵列(103)和所述信息载体(101)之间的角度值(S)以及用于调节所述光点(103)的角位置的致动装置(AC 1 -AC 2 -AC 3) 信息载体(101)相对于所述光点阵列(103)从根据所述角度值(S)导出的控制信号(114)。
    • 5. 发明申请
    • Repetitive controller and drive servo system including it
    • 重复控制器和驱动伺服系统包括它
    • US20060061903A1
    • 2006-03-23
    • US10538628
    • 2003-12-12
    • Thomas De Hoog
    • Thomas De Hoog
    • G11B5/596
    • G11B7/0953G05B5/01G11B5/012G11B5/59627G11B2005/001
    • The invention generally relates to the field of repetitive controllers for suppressing periodic signals with half-wave symmetry and, more specifically, to a repetitive controller having the form of a memory loop fed with a periodic signal of period NT and in which the memory size includes N/2 memory elements, the feedback connection is negative and a factor of −½ is provided at the output of the memory loop. Such a repetitive controller may be used for instance in the disturbance compensation module of a drive servo system in a recording and reproducing apparatus including a head for recording data on a recording medium.
    • 本发明一般涉及用于抑制具有半波对称性的周期性信号的重复控制器的领域,更具体地说,涉及具有周期NT的周期性信号的存储环路的形式的重复控制器,其中存储器大小包括 N / 2个存储器元件,反馈连接是负的,并且在存储器回路的输出处提供了1/2的因子。 这样的重复控制器例如可以用在包括用于在记录介质上记录数据的记录头的记录和再现装置中的驱动伺服系统的干扰补偿模块中。