Measurement of instantaneous shaft speed by advanced vibration signal processing- application to wind turbine gearbox
Résumé
Condition monitoring of machines working under non-stationary operations is a one of the most challenging problems in maintenance. Wind turbine is an example of such class of machines. As it was suggested by Bartelmus and Zimroz, one of effective approach may be to identify operating conditions and investigate their influence on used diagnostic features. Commonly used methods based on measurement electric current, rotational speed, power and other process variables requires additional equipment (sensors, acquisition cards) and software. It is proposed to use advanced signal processing techniques for instantaneous shaft speed recovery from vibration signal. It may be used instead of extra channels or in parallel as signal verification.