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    • 94. 发明授权
    • Disk recording and reproducing apparatus
    • 磁盘记录和再现装置
    • US06324134B1
    • 2001-11-27
    • US09368116
    • 1999-08-04
    • Yoshinobu OhtachiHirotaka NamikiAkira ShimadaYutaka SegawaIkuo Muto
    • Yoshinobu OhtachiHirotaka NamikiAkira ShimadaYutaka SegawaIkuo Muto
    • G11B700
    • G11B7/095G11B19/2009
    • Conventional disk recording and reproducing apparatuses have addressed a shortcoming that they cannot correct squareness errors and misalignments caused by the warpage of a disk and the eccentricity of the center hole of the disk and of the center of curvature of signal tracks. To overcome this shortcoming, a disk recording and reproducing apparatus of the present invention comprises: magnetic bearing means capable of supporting a rotary body and adjusting a relative position of the rotary body; a pickup for irradiating, with a laser beam, a recording surface of a disk mounted on a table arranged on the rotary body and receiving the laser beam reflected by the recording surface; detection means for calculating a relative positional relationship between the disk and a focal position of the laser beam based on a signal from the pickup; and control means for adjusting the position of the rotary body by controlling the magnetic bearing means.
    • 传统的磁盘记录和再现装置已经解决了一个缺点:它们不能校正由于盘的翘曲和盘的中心孔的偏心度以及信号轨道的曲率中心引起的矩形误差和不对准。 为了克服这个缺点,本发明的磁盘记录和再现装置包括:能够支撑旋转体并调节旋转体的相对位置的磁性轴承装置; 拾取器,用激光束照射安装在设置在旋转体上的台上的盘的记录表面,并接收由记录表面反射的激光束; 检测装置,用于基于来自拾取器的信号计算所述盘和所述激光束的焦点位置之间的相对位置关系; 以及控制装置,用于通过控制磁性轴承装置来调节旋转体的位置。
    • 98. 发明授权
    • Servo control apparatus
    • 伺服控制装置
    • US5115418A
    • 1992-05-19
    • US587450
    • 1990-09-25
    • Akira Shimada
    • Akira Shimada
    • B25J9/16G05B13/02G05B19/19
    • B25J9/163G05B13/023G05B19/19G05B2219/41112G05B2219/41367G05B2219/41374
    • A servo control apparatus for controlling according to a position command signal an object in a mechanical drive system having a position detector.A state observer is receptive of a drive torque signal and a position detection signal from the position detector for processing these signals to estimate concurrently a disturbance torque and velocity of the object to output an estimated disturbance torque signal and an estimated velocity signal.A position control processor is receptive of the position command signal, the position detection signal, the estimated disturbance signal and the estimated velocity signal for processing these signals to carry out positive feedback of the estimated disturbance torque signal and velocity feedback compensation by the estimated velocity signal to thereby produce the drive torque signal effective to control the object and to cancel out an actual disturbance torque generated in the object.
    • 一种用于根据位置指令信号控制具有位置检测器的机械驱动系统中的物体的伺服控制装置。 状态观察者接收来自位置检测器的驱动扭矩信号和位置检测信号,用于处理这些信号,同时估计物体的扰动转矩和速度,以输出估计的扰动转矩信号和估计的速度信号。 位置控制处理器接收位置指令信号,位置检测信号,估计干扰信号和估计速度信号,以处理这些信号,以通过估计的速度信号执行估计的干扰转矩信号和速度反馈补偿的正反馈 从而产生有效控制物体的驱动扭矩信号,并消除在物体中产生的实际扰动转矩。