Motors: expansible chamber type – Working member position feedback to motive fluid control – With means to vary feedback signal in response to rate of...
Patent
1976-10-29
1979-01-02
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
With means to vary feedback signal in response to rate of...
91461, F15B 1316
Patent
active
041321529
ABSTRACT:
Two embodiments of closed loop electro-fluidic controlled systems are disclosed for controlling the velocity, acceleration, torque, force or pressure applied to the member. The system includes a source of electrical command signals correlated to the desired magnitude of the parameter being controlled, a transducer responsive to the controlled member for providing an electrical feedback signal correlated to the actual value of the parameter, and a circuit for providing an error signal correlated in magnitude and polarity to the magnitude and sense of the difference between the actual and desired values of the controlled parameter. Also included is a transducer responsive to the error signal for applying a positioning force to a movable valve closure element, which is subjected to no other forces, to regulate the application of pressurized fluid through the valve to the controlled member in dependence upon the error signal. No feedback, mechanical, fluidic or otherwise, exists between the valve element and the transducer which positions it.
REFERENCES:
patent: 2797666 (1957-07-01), Chubbuck
patent: 2939430 (1960-06-01), Westbury
patent: 3257914 (1966-06-01), Thorner
patent: 3386343 (1968-06-01), Gray
Hunkar Denes B.
Ortlepp Hans
Hunkar Laboratories, Inc.
Maslousky Paul E.
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