초록 ▼

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

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.

대표청구항 ▼

A method for controlling a pressure regulator and an electric actuator means for operating the pressure regulator to control the pressure of control fluid regulated by the pressure regulator in response to a reference signal, the method comprising the steps of: generating feedback signals including

A method for controlling a pressure regulator and an electric actuator means for operating the pressure regulator to control the pressure of control fluid regulated by the pressure regulator in response to a reference signal, the method comprising the steps of: generating feedback signals including a first feedback signal as a function of the actual pressure of the regulated control fluid; generating an error signal based on the difference between the reference signal and the feedback signals, the error signal being representative of a desired amount of control fluid pressure change; and generating a first control signal as a function of the error signal to control the actuator means, wherein the improvement comprises: generating an expected pressure differential signal based on the difference between the reference signal and the first feedback signal; generating a second feedback signal as a function of the pressure of the regulated control fluid in response to the first control signal; generating an actual pressure differential signal as a function of the difference between the first and second feedback signals; generating a correction factor based on the difference between the actual pressure differential signal and the expected pressure differential signal; modifying the error signal as a function of the correction factor; storing the correction factor; and generating a second control signal as a function of the modified error signal to control the actuator means as a function of the actual level of regulated control fluid pressure to compensate for varying system operating conditions.