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    • 23. 发明授权
    • Adaptive feedback system for controlling head/arm position in a disk
drive
    • 用于控制磁盘驱动器中的磁头/臂位置的自适应反馈系统
    • US5548192A
    • 1996-08-20
    • US490478
    • 1995-06-14
    • D. Mitchel Hanks
    • D. Mitchel Hanks
    • G05B13/02G05B19/19G05D3/12G05B19/00
    • G05B13/027G05B19/19G05B2219/33036G05B2219/33046G05B2219/41151G05B2219/41152
    • A method for adjusting a compensator in a feedback control system for a coupled plant, derives a plurality of forward error values from position error signals that are sensed as outputs from the plant in response to a disturbance of the plant's operation. The position error signals are determined over plural, increasingly forward, time segments. A plurality of compensator output values are also determined over predetermined plural increasing forward, time segments. The derived forward error values are applied as inputs to the plant in a back propagation order, that order being in reverse time order to the time order in which the forward position error values were derived. Plural back propagation error values result in response to the back propagation application of the forward position error values. The back propagation error values are derived from within a portion of the compensator which has been configured as a Direct Form II filter function. The plural back propagation error values are then utilized in conjunction with the compensator output values and the forward position error values to derive altered compensator gain stage values to enable a reduction of the forward error values. To provide increased correction capability, the forward position error signals are altered by weighting functions before being employed as inputs to achieve the back propagation error values.
    • 一种用于调整用于耦合设备的反馈控制系统中的补偿器的方法,从响应于设备操作干扰的来自工厂的位置误差信号导出多个前向误差值。 位置误差信号在多个,日益前进的时间段上确定。 还在预定的多个增加的前进时间段中确定多个补偿器输出值。 导出的前向误差值以反向传播顺序作为输入施加到工厂,该顺序是与向前位置误差值的时间顺序相反的时间顺序。 多个反向传播误差值导致响应于前向位置误差值的反向传播应用。 反向传播误差值是从已经被配置为直接形式II滤波器功能的补偿器的一部分内导出的。 然后,多个反向传播误差值与补偿器输出值和前向位置误差值结合使用以导出改变的补偿器增益级值,以便能够减少前向误差值。 为了提供增加的校正能力,在被用作输入以实现反向传播误差值之前,通过加权函数来改变前向位置误差信号。
    • 24. 发明授权
    • Method and apparatus for testing a piezoelectric force sensor
    • 用于测试压电力传感器的方法和装置
    • US5447051A
    • 1995-09-05
    • US102597
    • 1993-08-05
    • D. Mitchel HanksLarry S. Metz
    • D. Mitchel HanksLarry S. Metz
    • G01L25/00G01P15/09G01P21/00G01R29/22G01P15/08
    • G01P15/0922G01P21/00
    • A test system for a piezoelectric element per se or a piezoelectric element in a physical system, which is subject to forces which deform the piezoelectric element, couples an electrical pulse to the piezoelectric element sufficient to stress the element and induce mechanical ringing upon pulse removal. The ringing electrical signal developed by the piezoelectric element characterizes the functionality of the piezoelectric element. A response circuit which is responsive to the ringing electrical signal provides an electrical signal indicative of the functional condition of the piezoelectric element. The electrical signal is peak detected. The peak detected voltage is compared with a reference voltage to provide an indication of the functionality of the piezoelectric element.
    • 用于压电元件本身的测试系统或物理系统中的受压力使压电元件变形的压电元件的测试系统将电脉冲耦合到压电元件,足以在脉冲去除时对元件施加应力并引起机械振铃。 由压电元件开发的振铃电信号表征了压电元件的功能。 响应于振铃电信号的响应电路提供表示压电元件的功能状态的电信号。 电信号是峰值检测。 将峰值检测电压与参考电压进行比较,以提供压电元件的功能性的指示。