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A valve control system includes a valve connected to regulate flow of a medium provided to an output and a sensor connected to monitor a feedback value associated with the medium. A controller modulates the valve based on a comparison of a reference value to the feedback value provided by the sensor

A valve control system includes a valve connected to regulate flow of a medium provided to an output and a sensor connected to monitor a feedback value associated with the medium. A controller modulates the valve based on a comparison of a reference value to the feedback value provided by the sensor. The controller detects saturation of the valve if the error between the monitored feedback value and reference value exceeds a threshold. In response to detected saturation, the controller reduces the reference value to a value less than the monitored feedback value.

대표청구항 ▼

1. A method of operating a flow control valve, the method comprising: receiving a feedback value associated with a medium provided through the flow control valve;generating an error value by comparing the monitored feedback value to a reference value;detecting saturation of the flow control valve if

1. A method of operating a flow control valve, the method comprising: receiving a feedback value associated with a medium provided through the flow control valve;generating an error value by comparing the monitored feedback value to a reference value;detecting saturation of the flow control valve if the error value is greater than a threshold;de-saturating the flow control valve by decreasing the reference value to a value less than the monitored feedback value; andmodulating the flow control valve based on the decreased reference value. 2. The method of claim 1, wherein decreasing the reference value to a value less than the monitored feedback value includes decreasing the reference value to a value that is less than the feedback value and a deadband zone. 3. The method of claim 1, further including: increasing the reference value to an original value when the saturation condition ends. 4. The method of claim 1, wherein the medium is a gas. 5. The method of claim 1, wherein the medium is a fluid. 6. The method of claim 1, wherein the feedback value is a monitored pressure feedback value. 7. The method of claim 1, wherein the feedback value is a monitored flow feedback value. 8. A valve control system comprising: a valve connected to regulate flow of a medium provided to an output;a sensor connected to monitor a feedback value associated with the medium; anda controller connected to monitor the feedback value associated with the medium, regulate the valve based on a comparison of the feedback value to a reference signal, and detect saturation of the valve when an error between the feedback value and the reference signal exceeds a threshold value, wherein in response to detected saturation of the valve the controller decreases the reference signal to a value less than the feedback value. 9. The valve control system of claim 8, wherein when decreasing the reference signal to a value less than the monitored feedback value, the controller decreases the reference value to a value that is a fixed amount less than the feedback value. 10. The valve control system of claim 8, wherein the controller increases the reference value to an original value when the saturation condition ends. 11. The valve control system of claim 8, wherein the medium is a gas. 12. The valve control system of claim 8, wherein the medium is a fluid. 13. The valve control system of claim 8, wherein the sensor is a pressure sensor that provides a monitored pressure value as feedback. 14. The valve control system of claim 8, wherein the sensor is a flow sensor that provides a monitored flow value as feedback. 15. A bleed air valve system employed on an aircraft to provide bleed air to a load, the bleed air valve system comprising: a bleed valve connected to a bleed air source to regulate bleed air pressure;a pressure sensor connected to monitor a pressure feedback value associated with the bleed air provided by the bleed valve;a flow control valve connected to regulate flow of the bleed air provided to the load;a flow sensor connected to monitor a flow feedback value associated with the bleed air; anda controller connected to monitor the pressure feedback value and the flow feedback value, regulate the bleed valve based on a comparison of the pressure feedback value to a pressure reference value, regulate the flow control valve based on a comparison of the flow feedback value to a flow reference value, detect saturation of the bleed valve if an error between the pressure feedback value and the pressure reference signal exceeds a threshold value, and detect saturation of the flow control valve if an error between the flow feedback value and the flow reference signal exceeds a threshold value, wherein in response to detected saturation of the bleed valve the controller decreases the pressure reference signal to a value less than the pressure feedback value and in response to detected saturation of the flow control valve the controller decreases the flow reference signal to a value less than the flow feedback value. 16. The bleed valve system of claim 15, wherein the controller increases the pressure reference signal and/or the flow reference signal when the aircraft changes operating conditions. 17. The bleed valve system of claim 16, wherein the controller increases the pressure reference signal and/or the flow reference signal after aircraft takeoff.