Measuring system repeatable bandwidth for simulation testing
    1.
    发明授权
    Measuring system repeatable bandwidth for simulation testing 有权
    测量系统可重复带宽进行模拟测试

    公开(公告)号:US06385564B1

    公开(公告)日:2002-05-07

    申请号:US09439169

    申请日:1999-11-12

    IPC分类号: G06B1700

    CPC分类号: G01M7/027 G01M7/022

    摘要: A system and method for identifying characteristics of a physical system applies substantially identical drive ensembles to the physical system and obtains corresponding responses from the physical system. A repeatable bandwidth of the physical system is estimated as a function of the applied drive ensembles and the corresponding obtained responses. Instructions can be provided on a computer readable medium to perform the method.

    摘要翻译: 用于识别物理系统的特征的系统和方法将基本上相同的驱动器组合应用于物理系统,并从物理系统获得相应的响应。 物理系统的可重复带宽被估计为所应用的驱动器组合和对应的获得的响应的函数。 可以在计算机可读介质上提供指令以执行该方法。

    Servovalve flow linearization circuit
    2.
    发明授权
    Servovalve flow linearization circuit 失效
    伺服阀流量线性化电路

    公开(公告)号:US4336745A

    公开(公告)日:1982-06-29

    申请号:US123720

    申请日:1980-02-22

    申请人: Richard A. Lund

    发明人: Richard A. Lund

    摘要: A linearization circuit for use with servovalves for controlling reciprocating actuators. The circuit will maintain a substantially linear flow as a function of spool position from the servovalve regardless of the differential pressure across the servovalve orifices, for example the differential pressures which result from changing direction of movement of the controlled actuator under a high load. A differential pressure signal from the actuator, which correlates to differential pressure on the servovalve orifices is processed to provide a compensation signal combined with the normal control signal to achieve the desired output.

    摘要翻译: 用于控制往复执行器的伺服阀的线性化电路。 电路将保持作为来自伺服阀的阀芯位置的函数的基本上线性的流动,而不管跨越伺服阀孔的压差,例如由受控致动器在高负载下的移动方向导致的压差。 处理与致动器的差压信号,其与伺服阀的压差相关,以提供与正常控制信号组合的补偿信号,以实现期望的输出。

    Method and apparatus for generating input signals in a physical system

    公开(公告)号:US07031949B2

    公开(公告)日:2006-04-18

    申请号:US10057294

    申请日:2001-11-08

    申请人: Richard A. Lund

    发明人: Richard A. Lund

    IPC分类号: G06N5/00

    摘要: A method and apparatus for controlling a physical system responsive to an input to produce a selected output comprises defining a virtual identity system that includes the physical system for receiving the input to provide an actual output. A quality of identity of the virtual identity system is checked using at least a function of the actual output. In a preferred embodiment, adjustments are made to a model of the physical system as a function the quality of identity in order to render the correct input more efficiently and accurately.

    Servovalve drive electronics improvements
    4.
    发明授权
    Servovalve drive electronics improvements 失效
    伺服阀驱动电子改进

    公开(公告)号:US4679591A

    公开(公告)日:1987-07-14

    申请号:US840402

    申请日:1986-03-17

    摘要: The present invention provides a circuit for obtaining higher accuracy and total system response for complex mechanical impedance loads, such as earthquake simulators, and in particular to compensate for limitations in controlling the actual valve spool displacement and adequately stabilizing and controlling it at high frequencies. The improvement circuit includes a state variable filter to extend the band width of servovalve actuation frequencies by adding a lead compensation signal compensating for servovalve hydraulic responses. The output of the first filter circuit then in turn feeds a summing junction where the spool displacement feedback is provided, and the output of the summing junction or circuit is provided with the output from an additional filter which cleans up the signal by filtering out noise and insures that the phase of stabilizing signals is proper. The final input signal that is then fed into a unique drive system utlizing two amplifiers connected as current pumps to independently drive the electrical motor coils that in turn drive the valve spool to insure adequate current for driving the spool in opposite directions at high frequencies.

    摘要翻译: 本发明提供了一种用于为诸如地震模拟器的复杂机械阻抗负载获得更高精度和总系统响应的电路,并且特别地用于补偿控制实际阀芯位移并在高频下充分稳定和控制它的限制。 改进电路包括状态变量滤波器,通过增加补偿伺服阀液压响应的引导补偿信号来扩展伺服阀驱动频率的带宽。 第一滤波器电路的输出然后进给馈线,其中提供线轴位移反馈,并且求和结或电路的输出提供有来自附加滤波器的输出,滤波器滤除掉噪声并清除信号, 确保稳定信号的相位是正确的。 最后的输入信号然后被馈送到独特的驱动系统中,利用连接成当前泵的两个放大器来独立地驱动电动机线圈,该电动机线圈又驱动阀芯以确保足够的电流以在高频下以相反的方向驱动线轴。

    Method of ascertaining control parameters for a control system
    5.
    发明授权
    Method of ascertaining control parameters for a control system 有权
    确定控制系统控制参数的方法

    公开(公告)号:US06917840B2

    公开(公告)日:2005-07-12

    申请号:US10323707

    申请日:2002-12-18

    申请人: Richard A. Lund

    发明人: Richard A. Lund

    IPC分类号: G05B13/02 G05B5/01 G05B13/04

    CPC分类号: G05B5/01 G05B13/042

    摘要: A method of ascertaining control parameters for a control system having a controller and a plant includes establishing a model of the plant and a model of the controller and calculating a performance index for a closed-loop system as a function of controller parameters, accounting for selected stability margins.

    摘要翻译: 确定具有控制器和设备的控制系统的控制参数的方法包括建立工厂的模型和控制器的模型,并根据控制器参数计算闭环系统的性能指标,计算所选择的 稳定裕度。