Patent ID: 7421378
Filing Date: 2008-09-02
Classification: F16K

Abstract:
1. Diagnosing method for an apparatus having at least a first and a second movable mechanical component, both said at least a first and a second movable mechanical component influencing a power flow within said apparatus, comprising: measuring a total power supplied to said apparatus to obtain a power signal representing supplied power as a function of time; creating a dynamic physical power-flow model of said apparatus based on design considerations of dynamic interaction between said at least a first and a second movable mechanical components; said dynamic physical power-flow model representing a course of events, which at least to a part is aperiodic; said dynamic physical power-flow model being entirely described by model parameters directly connected to individual mechanical and/or electromagnetic quantities of said at least a first and a second movable mechanical components; adapting values of said model parameters in order to fit said dynamic physical power-flow model to signatures of said power signal; and diagnosing operation of said apparatus based on said adapted parameter values.