A FAULT STATE DETECTION APPARATUS

The present invention relates to a fault state detection apparatus, comprising:- an input unit; and- a processing unit.The input unit is configured to receive condition monitoring data. The processing unit is configured to implement a trained machine learning algorithm to analyse the received condition monitoring data to determine if the received condition monitoring data is associated with a fault state. The trained machine learning algorithm was trained on the basis of a plurality of non-fault state condition monitoring data and associated ground truth information and on the basis of a plurality of fault state condition monitoring data and associated ground truth information. A subset of the plurality of fault state condition monitoring data was generated from one or more non-fault state condition monitoring data. Generation of fault state conditioning monitoring data in the subset of the plurality of fault state condition monitoring data comprises a transformation of non-fault state condition monitoring data to fault state condition monitoring data.