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    Electrohydraulic control of a hydraulic machine
    4.
    发明公开
    Electrohydraulic control of a hydraulic machine 失效
    Elektro-hydraulische Regelungfüreine Hydraulik-Maschine。

    公开(公告)号：EP0419984A2

    公开(公告)日：1991-04-03

    申请号：EP90117815.2

    申请日：1990-09-15

    Applicant: VICKERS INCORPORATED

    Inventor： Burgess, Roy T. ,  Gunda, Rajamouli ,  Herta, Frank ,  Hodges, Robert C. ,  Kessler, James A. ,  Leemhuis, Richard S. ,  McCarty, Michael R. ,  Stephens, Robert W.

    IPC: F04B49/06

    CPC classification number: G05D16/2066 ,  F04B49/065 ,  F04B2201/1201 ,  F04B2201/12051 ,  F04B2205/05 ,  F04B2207/01 ,  F04B2207/0422

    Abstract: A rotary hydraulic machine such as a variable displacement in-­line or axial piston pump including a housing (60), a shaft (66), a cylinder block (70), pistons (74) disposed therein and a valve block (62). A microprocessor-based controller (42) is externally mounted on the pump valve block (62) and includes internal memory having various remotely-selectable control programs prestored therein. Sensors (50, 52, 54) responsive to pump operating conditions are connected to the pump control electronics, and include a first sensor (50) responsive to yoke position, a pressure sensor (52) responsive to pump output pressure and a speed sensor (54) responsive to angular velocity of shaft rotation. All of the electronic components are mounted on the valve block (62).

    Abstract translation: 一种旋转液压机，例如可变排量的在线或轴向柱塞泵，包括壳体（60），轴（66），气缸体（70），设置在其中的活塞（74）和阀块（62）。 基于微处理器的控制器（42）被外部安装在泵阀块（62）上，并且包括其中预先存储有各种可远程选择的控制程序的内部存储器。 响应于泵操作条件的传感器（50,52,54）连接到泵控制电子器件，并且包括响应于轭位置的第一传感器（50），响应于泵输出压力的压力传感器（52）和速度传感器 54）响应于轴旋转的角速度。 所有电子部件安装在阀块（62）上。

    Electrohydraulic servo system
    6.
    发明公开
    Electrohydraulic servo system 失效
    电动伺服系统

    公开(公告)号：EP0272598A3

    公开(公告)日：1990-05-16

    申请号：EP87118652.4

    申请日：1987-12-16

    Applicant: Vickers Incorporated

    Inventor： Gunda, Rajamouli ,  McCarty, Michael R. ,  Rode, Melvin A.

    IPC: F15B9/03 ,  F04B49/06

    CPC classification number: F15B19/002 ,  G05B19/414 ,  G05B2219/33337 ,  G05B2219/41309

    Abstract: An electrohydraulic servo system which includes one or a plurality of pressure compensated flow control servo valves (12, 14) for feeding hydraulic fluid from a variable displacement pump (16) to associated actuators (18, 20) and loads (1, 2). A closed-loop velocity-control servo system (22, 24) is coupled to each servo valve (12, 14), and is responsive to velocity command inputs (V1, V2) from an operator (26) and to feedback signals (Y1, Y2) from the respective loads (1, 2) for providing flow control signals (U1, U2) to the respective servo valves (12, 14). A pump controller (36) receives the valve flow control signals (U1, U2), derives associated valve vlow signals (Q1, Q2) from predetermined functional characteristics of the pressure compensated valves, and obtains a total flow demand (Qc) as a function of the sum of the indicated individual valve flows. A pump displacement command (Dc) is derived as a combined function of total flwo demand (Qc) and pump speed (N) to accommodate volumetric inefficiencies which vary with speed (N), and the displacement command signal (Dc) is fed to a pump displacement servo control loop (60) for controlling pump output. Displacement command (Dc) is limited (at 50, 52) as a function (NL) of power available at the engine coupled to the pump to prevent engine stall.

    Electrohydraulic servo system
    7.
    发明公开
    Electrohydraulic servo system 失效
    Elektrohydraulisches Hilfskraftsystem。

    公开(公告)号：EP0272598A2

    公开(公告)日：1988-06-29

    申请号：EP87118652.4

    申请日：1987-12-16

    Applicant: Vickers Incorporated

    Inventor： Gunda, Rajamouli ,  McCarty, Michael R. ,  Rode, Melvin A.

    IPC: F15B9/03 ,  F04B49/06

    CPC classification number: F15B19/002 ,  G05B19/414 ,  G05B2219/33337 ,  G05B2219/41309

    Abstract: An electrohydraulic servo system which includes one or a plurality of pressure compensated flow control servo valves (12, 14) for feeding hydraulic fluid from a variable displacement pump (16) to associated actuators (18, 20) and loads (1, 2). A closed-loop velocity-control servo system (22, 24) is coupled to each servo valve (12, 14), and is responsive to velocity command inputs (V1, V2) from an operator (26) and to feedback signals (Y1, Y2) from the respective loads (1, 2) for providing flow control signals (U1, U2) to the respective servo valves (12, 14). A pump controller (36) receives the valve flow control signals (U1, U2), derives associated valve vlow signals (Q1, Q2) from predetermined functional characteristics of the pressure compensated valves, and obtains a total flow demand (Qc) as a function of the sum of the indicated individual valve flows. A pump displacement command (Dc) is derived as a combined function of total flwo demand (Qc) and pump speed (N) to accommodate volumetric inefficiencies which vary with speed (N), and the displacement command signal (Dc) is fed to a pump displacement servo control loop (60) for controlling pump output. Displacement command (Dc) is limited (at 50, 52) as a function (NL) of power available at the engine coupled to the pump to prevent engine stall.

    Abstract translation: 一种电动液压伺服系统，其包括一个或多个压力补偿流量控制伺服阀（12,14），用于将液压流体从可变排量泵（16）输送到相关联的致动器（18,20）和负载（1,2）。 闭环速度控制伺服系统（22,24）耦合到每个伺服阀（12,14），并响应于来自操作者（26）的速度命令输入（V1，V2）和反馈信号（Y1 ，Y2），用于向各个伺服阀（12,14）提供流量控制信号（U1，U2）。 泵控制器（36）接收阀流量控制信号（U1，U2），根据压力补偿阀的预定功能特性导出相关的阀门流出信号（Q1，Q2），并获得总流量需求（Qc）作为函数 指示单个阀流量的总和。 泵排量指令（Dc）被导出为总流量需求（Qc）和泵速（N）的组合函数，以适应随速度（N）而变化的体积效率，并且位移指令信号（Dc）被馈送到 泵排量伺服控制回路（60），用于控制泵输出。 排量指令（Dc）作为与泵连接的发动机可用功率（NL）的限制（50,52）以防止发动机停转。

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