Patent ID: 6217506
Filing Date: 2001-04-17
Classification: F16K,G05D,Y10T

Abstract:
A method of controlling a fluid in a life support system including at least one of a G-suit and a counterpressure garment, utilizing a control system including a control valve and there being means to provide an input to the control system to cause an actuator to move a moveable part of the valve to operate the valve to bring a parameter of the fluid, towards a desired value, and means to condition the input to provide a control signal to cause the actuator to move the moveable part of the valve and wherein in that the method comprises conditioning the input by comparing the input with reference information relating to the position of the moveable part of the valve, and when the comparison indicates that the position of the moveable part of the valve is not at a desired position, issuing the control signal incrementally to move the moveable part, and updating the reference information so that the updated reference information is available for future comparison with the input.