Power signature diagnosing

Diagnosing device 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 components influencing a power flow within said apparatus, said diagnosing device comprising:

• a power meter measuring power supplied to said apparatus;
• a processor connected to an output of said power;
• meter, said processor in turn comprising means for obtaining a power signal representing supplied power as a function of time,
• means for providing 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 means for providing being connected to said processor;
• 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;
• said processor further comprising:
• means for adapting values of said model parameters in order to fit said dynamic physical power-flow model to signatures of said power signal;
• and
• means for diagnosing operation of said apparatus based on said adapted parameter values.

Apparatus comprising:

• at least a first and a second movable mechanical component;
• both said at least a first and a second movable mechanical components influencing a power flow within said apparatus;
• and
• a diagnosing device;
• said diagnosing device in turn comprising:
• a power meter measuring power supplied to said apparatus;
• and
• a processor connected to an output of said power meter;
• said processor in turn comprising means for obtaining a power signal representing supplied power as a function of time
• means for providing 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 means for providing being connected to said processor;
• 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;
• and in that
• said processor further comprising:
• means for adapting values of said model parameters in order to fit said dynamic physical power-flow model to signatures of said power signal;
• and
• means for diagnosing operation of said apparatus based on said adapted parameter values.