Modular hydraulic control system

Details Modular hydraulic control system Modular hydraulic control system

1992-09-30

1994-06-21

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91509, 60403, F15B 903

Patent

active

053220030

ABSTRACT:
A system of modular electrohydraulic servovalves is centrally controlled may be used to control the operation of critical hydraulic actuators. A programmable controller operates a group of modular servovalves which each deliver a portion of the total actuator fluid requirements. The flow rate, valve position, and valve pressure of each servovalve is monitored by the controller and compared to expected values in memory to determine whether a servovalve malfunction exists. If so, the controller maintains the required flow rate to the actuator by closing the malfunctioning valve and either activating a spare or proportionally increasing the flow rates of the remaining servovalves to compensate for the loss.

REFERENCES:
patent: 2976848 (1961-03-01), Place
patent: 3138002 (1964-06-01), Ernst et al.
patent: 3338139 (1967-08-01), Wood
patent: 3482486 (1969-12-01), Nordholm
patent: 3724330 (1973-04-01), Mason
patent: 4150686 (1979-04-01), El Sherif et al.
patent: 4436018 (1984-03-01), Murphy et al.

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