1. A method of monitoring an epicyclic assembly of a vehicle equipped with acceleration sensors, comprising the steps of: a) acquiring a signal from an acceleration sensor mounted on the epicyclic assembly for detecting the acceleration of a moving member of the epicyclic assembly; b) sampling said signal at a sampling frequency to obtain an initial sequence of samples; c) dividing the samples in said initial sequence into groups, each defined by a predetermined number of samples, said groups of samples being arranged in succession and each having a respective position in said succession; d) acquiring predetermined groups of samples; e) processing said predetermined groups of samples to obtain a final sequence of samples; and f) generating an alarm signal dependent upon a characteristic of said final sequence of samples.