Patent ID: 11860615
Assignee: TATA CONSULTANCY SERVICES LIMITED
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The method as claimed in claim 1, wherein identifying the at least one sensor as faulty comprising:
identifying the at least one sensor as a source sensor corresponding to the input data in all the segments determined as containing the anomalous data;
comparing a reconstruction error value of the at least one sensor with a threshold of sensor reconstruction error, wherein the reconstruction error value of the at least one sensor is calculated as at least one of an absolute difference as

RESi,j=|Xi,j−X′i,j|, squared absolute difference

RESi,j=(Xi,j−X′i,j)2, percentage absolute difference, RES
    
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  ,, between the original and reconstructed data, where RESi,jis the reconstruction error value for instance or time i for sensor j, Xi,j is an original value of sensor j at instance or time i, X′i,j is a reconstructed value of sensor j at instance or time i;; and
determining the at least one sensor as faulty if the reconstruction error value of the at least one sensor exceeds the threshold of sensor reconstruction error, wherein the threshold is obtained as μj+Kjσj where μjand σj are mean and standard deviation of all the reconstruction errors for sensor j, K is a user-defined parameter such that 95% or 99% of the reconstruction error values are lower than the threshold of reconstruction error.