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    • 5. 发明授权
    • Servovalve drive electronics improvements
    • 伺服阀驱动电子改进
    • US4679591A
    • 1987-07-14
    • US840402
    • 1986-03-17
    • Dale N. MaueRichard A. Lund
    • Dale N. MaueRichard A. Lund
    • G01M7/02F15B9/09F15B13/044G05B19/19
    • G05B19/19G05B2219/37133G05B2219/41156G05B2219/41203G05B2219/41278G05B2219/41309G05B2219/41423G05B2219/42032G05B2219/42033Y10T137/86405Y10T137/86622
    • 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.
    • 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。
    • 6. 发明公开
    • Power servo system
    • Leistungsservosystem。
    • EP0274046A1
    • 1988-07-13
    • EP87117430.6
    • 1987-11-26
    • Vickers Incorporated
    • El-Ibiary, Yehia M.Leemhuis, Richard S.
    • G05B13/02G05B19/19
    • G05B19/19G05B13/0245G05B2219/41202G05B2219/41204G05B2219/41205G05B2219/41278G05B2219/41318G05B2219/41434G05B2219/42256
    • A power servo system which includes an actuator (12) coupled to a load and receives an input command signal (Y) indicative of desired motion at the load. A sampled-data control system (20) receives and samples input signals indicative of desired and actual motion at the hydraulic actuator (12) and load, and provides control signals ( U(Z) ) to the actuator necessary to obtain desired motion. The sampled-data control system includes digital processing circuitry with series ( 32 a ) and feedback compensation ( 28 a ) coordinated with the hydraulic system transfer function, to form a complete closed-loop control system operating in the sampled-data or Z-transform domain. Different equation constants in the series and feedback compensation circuitry ( 28 a , 32 a ) are recalculated periodically. Such constants can be recalculated as a function of system behavior, so that system control automatically varies with operating conditions, or constants are calculated based upon a single operator-variable (or remote system) input, which accommodates rapid operator-implemented tracking of system behavior while reducing calculation time. Static gain can be selected independently of other variables.
    • 一种功率伺服系统,其包括耦合到负载的致动器(12)并且接收指示负载期望的运动的输入命令信号(Y)。 采样数据控制系统(20)在液压致动器(12)处接收并采样表示期望和实际运动的输入信号并加载,并且向执行器提供控制信号(U(Z)),以获得所需运动所需的运动。 采样数据控制系统包括与液压系统传递功能协调的串联(32a)和反馈补偿(28a)的数字处理电路,以形成在采样数据或Z变换中工作的完整的闭环控制系统 域。 系列和反馈补偿电路(28 a,32 a)中的不同方程常数被周期性地重新计算。 这些常数可以作为系统行为的函数进行重新计算,以便系统控制自动随操作条件而变化,或常数是基于单个操作员变量(或远程系统)输入计算的,这些输入可以适应快速操作员实现的系统行为跟踪 同时减少计算时间。 可以独立于其他变量选择静态增益。
    • 7. 发明授权
    • B-type actuator with time out
    • B型执行器超时
    • US5493191A
    • 1996-02-20
    • US308724
    • 1994-09-19
    • Chamroeun P. PhoyWilliam A. Andrews
    • Chamroeun P. PhoyWilliam A. Andrews
    • B60H1/00G05D3/14H02H7/085H02P1/04
    • H02H7/0851B60H1/00835G05D3/1472G05B2219/37464G05B2219/41278G05B2219/42205G05B2219/42229
    • An improved actuator (10) wherein movement of an external potentiometer (R.sub.x) to drive a bi-directional motor (50) and move an attached member starts a timer (68). When a predetermined time period has elapsed, the actuator cuts power to the drivers (U1) of the motor, thereby putting the system into a "sleep" mode in which a minimum amount of current is drawn. If the external potentiometer was moved so as to cause an end of travel position of the member and the motor stalls, the actuator maintains this stall condition only until expiration of the predefined time period at which time the sleep mode is initiated. This sleep mode is thereafter maintained until power is reset or until the position of the external control potentiometer is changed. The time-out period is set to allow for full movement of the vane as well as to compensate for any uncertainty as to whether an end of travel position has been reached.
    • 改进的致动器(10),其中移动外部电位计(Rx)以驱动双向电动机(50)并移动附接的构件启动定时器(68)。 当经过预定时间段时,致动器切断电动机的驱动器(U1)的电力,从而使系统进入最小量的电流的“睡眠”模式。 如果外部电位器被移动以使部件的行进位置结束并且电动机停止,则致动器仅保持该停止状态,直到在该时间段开始睡眠模式的预定时间段到期。 此后,该睡眠模式保持到电源复位或直到外部控制电位器的位置改变为止。 超时周期被设定为允许叶片的完全移动以及补偿是否已经达到行程位置结束的任何不确定性。
    • 8. 发明授权
    • Power transmission
    • 电力传输
    • US4774651A
    • 1988-09-27
    • US938259
    • 1986-12-05
    • Yehia M. El-IbiaryRichard S. Leemhuis
    • Yehia M. El-IbiaryRichard S. Leemhuis
    • G05B11/36F15B9/09G05B13/02G05B19/19G05B21/02G05D3/12
    • G05B19/19G05B13/0245G05B2219/41202G05B2219/41204G05B2219/41205G05B2219/41278G05B2219/41318G05B2219/41434G05B2219/42256
    • A power servo system which includes an actuator coupled to a load and receives an input command signal indicative of desired motion at the load. A sampled-data control system receives and samples input signals indicative of desired and actual motion at the hydraulic actuator and load, and provides control signals to the actuator necessary to obtain desired motion. The sampled-data control system includes digital processing circuitry with series and feedback compensation, coordinated with the hydraulic system transfer function, to form a complete closed-loop control system operating in the sampled-data or Z-transform domain. Different equation constants in the series and feedback compensation circuitry are recalculated periodically. Such constants are recalculated as a function of system behavior, so that system control automatically varies with operating conditions. Sampled data domain orders in the series and feedback compensation circuitry permit static gain and velocity constants to be selected independently of other system variables.
    • 一种电力伺服系统,其包括耦合到负载的致动器,并且接收指示负载期望的运动的输入指令信号。 采样数据控制系统在液压致动器和负载处接收并采样表示期望和实际运动的输入信号,并且向执行器提供控制信号以获得所需的运动。 采样数据控制系统包括具有串联和反馈补偿的数字处理电路,与液压系统传递功能协调,形成在采样数据或Z变换域中运行的完整的闭环控制系统。 定期重新计算串联和反馈补偿电路中的不同方程常数。 这些常数作为系统行为的函数重新计算,以便系统控制自动随操作条件而变化。 串联和反馈补偿电路中的采样数据域顺序允许独立于其他系统变量选择静态增益和速度常数。
    • 9. 发明授权
    • Power transmission
    • 电力传输
    • US4651272A
    • 1987-03-17
    • US740481
    • 1985-06-03
    • Yehia M. El-IbiaryRichard S. Leemhuis
    • Yehia M. El-IbiaryRichard S. Leemhuis
    • F15B9/09G05B13/02G05B19/19G05B21/02G05D3/12
    • G05B19/19G05B13/0245G05B2219/41204G05B2219/41205G05B2219/41278G05B2219/41318G05B2219/41434G05B2219/42256
    • A power servo system which includes an actuator coupled to a load and receives an input command signal indicative of desired motion at the load. A sampled-data control system receives and samples input signals indicative of desired and actual motion at the hydraulic actuator and load, and provides control signals to the actuator necessary to obtain desired motion. The sampled-data control system includes digital processing circuitry with series and feedback compensation, coordinated with the hydraulic system transfer function, to form a complete closed-loop control system operating in the sampled-data or Z-transform domain. Different equation constants in the series and feedback compensation circuitry are recalculated periodically. In one embodiment of the invention, such constants are recalculated as a function of system behavior, so that system control automatically varies with operating conditions. In another embodiment of the invention, system constants are calculated based upon a single operator-variable (or remote system) input, which accommodates rapid operator-implemented tracking of system behavior while reducing calculation time.
    • 一种电力伺服系统,其包括耦合到负载的致动器,并且接收指示负载期望的运动的输入指令信号。 采样数据控制系统在液压致动器和负载处接收并采样表示期望和实际运动的输入信号,并且向执行器提供控制信号以获得所需的运动。 采样数据控制系统包括具有串联和反馈补偿的数字处理电路,与液压系统传递功能协调,形成在采样数据或Z变换域中运行的完整的闭环控制系统。 定期重新计算串联和反馈补偿电路中的不同方程常数。 在本发明的一个实施例中,这些常数作为系统行为的函数被重新计算,使得系统控制随着操作条件而自动变化。 在本发明的另一个实施例中,系统常数是基于单个操作员变量(或远程系统)输入来计算的,其适应快速操作者实现的系统行为跟踪,同时减少计算时间。
    • 10. 发明申请
    • SERVOVALVE DRIVE ELECTRONICS IMPROVEMENTS
    • 伺服驱动电子改进
    • WO1987005669A1
    • 1987-09-24
    • PCT/US1987000411
    • 1987-03-02
    • MTS SYSTEMS CORPORATION
    • MTS SYSTEMS CORPORATIONMAUE, Dale, N.LUND, Richard, A.
    • F15B13/044
    • G05B19/19G05B2219/37133G05B2219/41156G05B2219/41203G05B2219/41278G05B2219/41309G05B2219/41423G05B2219/42032G05B2219/42033Y10T137/86405Y10T137/86622
    • A circuit (110, 129, 143, 145) 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 (44A) displacement and adequately stabilizing and controlling it at high frequencies. The improvement circuit includes a first state variable filter (110) 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 (110) then in turn feeds a summing junction (107) where the spool displacement feedback (17) is provided, and the output of the summing junction or circuit (107) is summed (133) with the output from an additional filter (129) which cleans up the signal by filtering out noise and which insures that the phase of stabilizing signals is proper. The final input signal (141) is then fed into a unique drive system utilizing two amplifiers (143, 145) connected as current pumps to independently drive the electrical motor coils (60, 61) that in turn drive the valve spool (44A) to insure adequate current for driving the spool (44A) in opposite directions at high frequencies.
    • 用于为复杂的机械阻抗负载(例如地震模拟器)获得更高精度和总系统响应的电路(110,129,143,145),特别是用于补偿控制实际阀芯(44A)位移和适当稳定的限制 并在高频下进行控制。 改进电路包括第一状态可变滤波器(110),通过添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。 然后,第一滤波器电路(110)的输出然后馈送提供线轴位移反馈(17)的求和结(107),并且求和结或电路(107)的输出与 来自附加滤波器(129)的输出,其通过滤除噪声来清除信号,并确保稳定信号的相位是适当的。 然后,利用连接为当前泵的两个放大器(143,145)将最后的输入信号(141)馈送到唯一的驱动系统中,以独立地驱动电动机线圈(60,61),该电动机线圈又驱动阀芯(44A)至 确保在高频下以相反方向驱动线轴(44A)的足够的电流。