Patent ID: 6687653
Filing Date: 2004-02-03
Classification: G05B,G06F

Abstract:
A local diagnostic subsystem usable to diagnose a component of a physical system, comprising:at least one observation variable, each observation variable storing a physical value received from a sensor monitoring a first component that describes a state of the first component; at least one assumption variable, each assumption variable storing a value representing an assumption about the state of the first component; at least one dependent variable, each dependent variable storing a value representing a quantity relating one of the at least one observation variable to one of the at least one assumption variable; a plurality of constraints, each constraint relating two of the at least one observation variable, the at least one assumption variable and the at least one dependent variable to describe a behavior of the component; and at least one diagnosis variable relating a local diagnosis of the local diagnostic subsystem to a second local diagnosis of a second local diagnostic subsystem.