Several different faults can be identified:

  • the localisation is rather accurate;
  • the severity or amount is roughly estimated (its accuracy probably depends strongly on the accuracy of the model);
  • its angular position (or phase) is always identified with good accuracy.
The method is rather robust with regards to:
  • modelling errors (the tuning or up-dating of the model is not strictly required);
  • measuring errors;
  • lack of information of some sensors of the turbogroup (the method works also if some sensors are out of service).

In some cases the identification may succeed also in steady state normal operating conditions. In order to distinguish between faults which generate similar symptoms (such as unbalances, extended bows, coupling misalignments, local bows due to rub), necessarily run-down transients have to be compared.
The method is suitable to be inserted in automatic diagnostic procedure for industrial applications.