Patent Document ID: 5412584
Application ID: 08159196
Patent Flag: 1

Claim One:
1. A diagnosing apparatus for diagnosing a dynamic system by detecting a fault of the dynamic system, comprising: (a) disturbance estimating means for estimating an integrated disturbance vector, which is the sum of external and internal disturbance vectors of the dynamic system, based on an internal state vector of the dynamic system; (b) correlation calculating means, coupled to said disturbance estimating means for receiving outputs thereof, and for calculating a cross-correlation between the estimated integrated disturbance vector and the internal state vector and for separating from the integrated disturbance vector a component relating to the internal disturbance; and (c) diagnosing means, coupled to said correlation calculating means for receiving an output thereof, and for specifying and diagnosing a corresponding fault portion of the dynamic system from the separated component relating to the internal disturbance.