Bearing faults detection can be performed by using bearing vibration or bearing current signatures. If the fault is not severe enough, the level of bearing vibration will not be increased much. On the contrary, bearing current signature changes in a manner that the fault signature will be identified. The proposed method has been tested using a simulated data which are generated by using a coupled electromagnetic circuits approach and the experimental data taken from a construction site by using a fluxgate sensor, which is one of the best sensors nowadays to monitor bearing faults.
Abstract: A multi-dimensional MUSIC (MD MUSIC) method is developed to detect single-point mechanical defects in induction motors. MD MUSIC algorithm is based on bearing faults characteristic frequencies, and is well-adapted to estimating the fundamental frequency and the fault related frequency. Then, an amplitude estimator of the fault characteristic frequencies is proposed and a fault indicator is derived for fault severity measurement. The proposed bearing defects detection approach is assessed using simulated stator currents data, issued from a coupled electromagnetic circuits approach for air-gap eccentricity emulating bearing defects. Then, experimental data are used for validation purposes.
Next week we'll be revealing a new set of mods for Destiny 2 which are yet to be announced. It's time to cover off the most exciting part of any Destiny 2 update, the Mod World Update.
Some applications, such as Java, require that the application directories and libraries are updated to a newer version before the user can update. However, there are some applications that are not explicitly API-specific, such as the X Window System, the X server source code, are automatically updated as required.
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