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26 条记录 (耗时 0.008 秒)

    CLOSED LOOP CONTROL SYSTEM AND METHOD USING BACK EMF ESTIMATOR
    1.
    发明公开
    CLOSED LOOP CONTROL SYSTEM AND METHOD USING BACK EMF ESTIMATOR 失效
    闭环控制的系统和方法使用EMF ABSCHATZERS的

    公开(公告)号：EP0778964A1

    公开(公告)日：1997-06-18

    申请号：EP95932358.0

    申请日：1995-08-31

    申请人： HONEYWELL INC.

    发明人： DAVIDSON, Dale, D. ,  SADEGHPOUR, Hamid R.

    IPC分类号： G05B19

    CPC分类号： G05B19/358 ,  G05B2219/37133 ,  G05B2219/37317 ,  G05B2219/39311

    摘要： A feedback control system which uses estimated back electromotive force (EMF) from a controlled actuator to provide feedback into the control system and improve control of the actuator. Back EMF is estimated from current through the actuator and voltage across the actuator. The estimated back EMF signal is fed back into the control system where it serves as a rate term. In the preferred embodiment the back EMF signal is used in combination with an actuator position signal which is also feedback into the control system. A complementary filter conditions both the rate and position signals for improved performance. The invention is particularly suited for controlling linear actuators which do not provide conventional rate feedback signals.

    Automated lapping machine control system
    3.
    发明公开
    Automated lapping machine control system 失效
    Steuerungssystemfüreine automatischeLäppmaschine。

    公开(公告)号：EP0375921A1

    公开(公告)日：1990-07-04

    申请号：EP89121389.4

    申请日：1989-11-18

    申请人： International Business Machines Corporation

    发明人： Biasillo, Alberto ,  Taylor, Richard Clayton

    IPC分类号： G05B19/18

    CPC分类号： G05B19/4166 ,  G05B2219/37133 ,  G05B2219/37542

    摘要： A lapping machine control system which utilizes a electromechanical probe (13) to generate a signal responsive to the separation of the laps (10, 11), which also represents the thickness of the part (13) being lapped. The separation signal, which is unsuitable for direct control since it is too noisy, is used with a best fit algorithm to estimate the time to reduce the part (13) to the desired thickness, based on the rate of material removal provided by extra­polated line (320) representing the best fit of the lap separation signal. The machining is terminated when the extrapolated line (320) reaches the intercept of time (340) and thickness (330).

    摘要翻译： 一种研磨机控制系统，其利用机电探头（13）产生响应于所述圈（10,11）的分离的信号，其也代表被研磨的部件（13）的厚度。 使用不适合直接控制的分离信号，因为它太嘈杂，使用最佳拟合算法来估计基于由外推线提供的材料去除速率将部件（13）减少到所需厚度的时间 （320）表示搭接分离信号的最佳拟合。 当外推线（320）达到时间间隔（340）和厚度（330）时，加工终止。

    Electrohydraulic system
    5.
    发明公开
    Electrohydraulic system 失效
    液压系统。

    公开(公告)号：EP0393697A2

    公开(公告)日：1990-10-24

    申请号：EP90107523.4

    申请日：1990-04-20

    申请人： VICKERS INCORPORATED

    发明人： Dahroug, Mohamed E. ,  El-Ibiary, Yehia M. ,  Gunda, Rajamouli ,  Smith, Paul M. ,  Silverthorn, Randall G.

    IPC分类号： G05B19/416 ,  F15B21/08 ,  B22D17/32

    CPC分类号： G05B19/416 ,  B22D17/32 ,  G05B2219/34215 ,  G05B2219/35312 ,  G05B2219/36171 ,  G05B2219/36513 ,  G05B2219/37133 ,  G05B2219/37313 ,  G05B2219/37333 ,  G05B2219/37399 ,  G05B2219/41301 ,  G05B2219/42123 ,  G05B2219/45244

    摘要： In a die casting machine that includes a shot cylinder having a ram for injecting metal into a die cavity, an electrohydraulic system for controlling operation of the shot cylinder includes an actuator coupled to the shot cylinder ram. A valve supplies hydraulic fluid to the actuator cylinder as a function of valve control signals. Microprocessor-based digital control electronics includes memory for storing a desired ram velocity profile as an incremental function of ram position. The control circuitry is responsive to signals from a sensor coupled to the actuator, indicative of position at the ram, for retrieving corresponding velocity signals from memory and supplying control signals to the valve as a function of such profile velocity signals. The control circuitry further includes facility for adjusting impact of the shot cylinder ram at the end of a cavity-filling stroke as a function of ram and actuator position and/or pressure, independently of the velocity/position profile, to reduce separation and flashing at the die cavity, and to reduce impact wear and fatigue on the overall die casting machine. A keyboard and associated operator display provide operator programmability and selection from a plurality of velocity/position profiles. The actuator and cylinder ram may be advanced in a manual mode of operation for adjustment and calibration proposes. A display associated with the keyboard graphically illustrates desired and actual velocity/position profiles during operation, together with a profile of actuator drive pressure verses position.

    摘要翻译： 在包括具有用于将金属注入模腔的冲头的喷射缸的压铸机中，用于控制喷射气缸的操作的电动液压系统包括联接到喷射缸柱塞的致动器。 阀门作为阀门控制信号的一个功能，向致动器气缸提供液压流体。 基于微处理器的数字控制电子设备包括用于存储所需的冲击速度轮廓作为推杆位置的增量功能的存储器。 控制电路响应于来自耦合到致动器的传感器的信号，指示压头处的位置，用于从存储器检索相应的速度信号，并根据这种轮廓速度信号向阀提供控制信号。 控制电路还包括用于在空腔填充冲程结束时调节喷射缸压头的冲击作为压头和致动器位置和/或压力的函数的功能，独立于速度/位置分布，以减少分离和闪烁在 模腔，并减少整体压铸机的冲击磨损和疲劳。 键盘和相关联的操作者显示器提供操作者可编程性和从多个速度/位置轮廓中的选择。 致动器和气缸柱塞可以在手动操作模式下进行，用于调节和校准。 与键盘相关联的显示器图形地示出了操作期间的期望和实际的速度/位置曲线，以及致动器驱动压力与位置的轮廓。

    Servo control apparatus
    6.
    发明公开
    Servo control apparatus 失效
    伺服Steuerungsgerät。

    公开(公告)号：EP0356133A2

    公开(公告)日：1990-02-28

    申请号：EP89308331.1

    申请日：1989-08-16

    申请人： TEIJIN SEIKI CO. Ltd.

    发明人： Ako, Hidenobu

    IPC分类号： G05B19/35

    CPC分类号： G05B19/351 ,  G05B2219/33268 ,  G05B2219/34215 ,  G05B2219/37133 ,  G05B2219/41099 ,  G05B2219/41301 ,  G05B2219/41309 ,  Y10T137/8671

    摘要： A servo control apparatus comprising: means for generating a control target; an actuator (3) adapted to drive a load (4) and having its maximum displacement in one direction and its minimum displacement in the other direction; drive means (1, 2) for driving said actuator (3); position detecting means (5) for detecting a displacement of said actuator (3); and control means (21) for correcting said control target on basis of said maximum and minimum displacements of said actuator (3) and for computing a control value so that an output of said position detecting means (5) is consistent with said corrected control target; said load (4) being controlled by said control value.

    摘要翻译： 一种伺服控制装置，包括：用于产生控制目标的装置; 适于驱动负载（4）并且在一个方向具有其最大位移并且在另一个方向上具有最小位移的致动器（3） 用于驱动所述致动器（3）的驱动装置（1,2）。 位置检测装置（5），用于检测所述致动器（3）的位移; 以及用于基于所述致动器（3）的所述最大和最小位移来校正所述控制目标并且用于计算控制值的控制装置（21），使得所述位置检测装置（5）的输出与所述校正控制目标 ; 所述负载（4）由所述控制值控制。