ABSTRACT
Due to an oscillating input torque created by the cylinders, a crankshaft is submitted to a detrimental phenomenon, the rotational irregularities. Moreover, these oscillations are known to excite the crankshaft torsional modes, able to break the part if no damping is provided. In this paper, the authors introduce a hybrid control concept that consists in an electromagnetic coupling of a passive rotating tuned mass damper and a permanent magnet machine, which aims to redistribute the energy in the system depending on the operative conditions. Results are presented on the performance of such a concept in numerical simulations and a guideline for the typical behaviours that characterize the damper due to non-linear effects and inherent conditions is outlined.
