Patent ID: 7132817
Filing Date: 2006-11-07
Classification: B06B,G05D

Abstract:
1. An unbalance dynamic load generator comprising at least one pair of eccentric rotating masses which are symmetric with respect to a plane and whose motion is controlled by at least one control signal generated by a control module as a function of a preset signal (Fc(t)) having a given frequency, including, for at least one of the masses, a reference angular position sensor (C) delivering a match signal (SP) representing the passing of the said rotating mass (M) through a reference angular position and a control circuit comprising a calculation circuit (DSP) for calculating the periodicity of the rotation of said mass from the successive position signals delivered by the position sensor (C) and for generating said control signal (CS) as a function of the difference between the calculated periodicity and the periodicity of the preset signal, and a phase measurement circuit for measuring a time gap between the signal delivered by the position sensor (C) and a reference point of the preset signal Fc(t) and wherein said calculation circuit (DSP) comprises a corrector module for generating said control signal also as a function of the difference between said measured time gap and a preset time gap.