Patent ID: 7114511
Filing Date: 2006-10-03
Classification: G01F,G05B,G05D,Y10T

Abstract:
1. A method of determining a displacement of a valve having a valve inlet to receive a flow of fluid at an inlet pressure and a valve outlet to provide the flow of fluid at an outlet pressure, the method comprising acts of: (A) selecting an intermediate pressure between the inlet pressure and the outlet pressure; (B) determining a first displacement of the valve based upon a viscous pressure drop from the inlet pressure to the intermediate pressure; (C) determining a second displacement of the valve based upon an inviscid pressure drop from the intermediate pressure to the outlet pressure; (D) determining whether the first displacement is approximately equal to the second displacement; and (E) selecting, one of the first displacement and the second displacement as the displacement of the valve when the first displacement is approximately equal to the second displacement.