Fluid handling – Processes – Involving pressure control
Patent
1989-11-13
1990-10-09
Chambers, A. Michael
Fluid handling
Processes
Involving pressure control
251 3002, 1374875, F16K 3112
Patent
active
049614410
ABSTRACT:
A method and system are provided for controlling a pressure regulator and an electric actuator mechanism for operating the pressure regulator by modifying a generated error signal as a function of at least one correction factor so that the actuator mechanism is controlled as a function of the actual level of regulated control fluid pressure to compensate for varying system operating conditions. A first correction factor is generated as a function of the difference between an actual pressure differential signal and an expected pressure differential signal. A second correction factor is based on the level of a feedback signal which is a function of the actual pressure of the regulated control fluid. An error signal generated by the method and system defines a ramp signal, wherein the shape of the ramp signal is defined by a data matrix of actual pressure differentials. The ramp signal may have a linear, exponential or a constant accelerationdeceleration shape. Preferably, the pressure regulator is a pilot operated pressure regulator and the actuator mechanism includes an up solenoid and a down solenoid.
REFERENCES:
patent: 3914581 (1975-10-01), Gilson
patent: 4134423 (1979-01-01), Mayer
patent: 4417312 (1983-11-01), Cronin et al.
patent: 4550747 (1985-11-01), Woodworth et al.
patent: 4673162 (1987-06-01), Lachman
patent: 4679583 (1987-07-01), Lucas et al.
patent: 4724865 (1988-02-01), Hirono et al.
patent: 4789001 (1988-12-01), Backe et al.
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