Fault Detection of Planetary Gears Based on Signal Space Constellations.

A new method to process the vibration signal acquired by an accelerometer placed in a planetary gearbox housing is proposed, which is useful to detect potential faults. The method is based on the phenomenological model and consists of the projection of the healthy vibration signals onto an orthonormal basis. Low pass components representation and Gram-Schmidt's method are conveniently used to obtain such a basis.