Torque harmonic reduction in hybrid vehicles

In this paper, the authors propose a novel control strategy of torque ripple reduction in hybrid vehicles. The Internal Combustion Engine (ICE) ripples are reduced by an active filter and a Permanent Magnet Synchronous Machine (PMSM). This electric motor is mounted on the crankshaft in order to generate a torque sequence opposing ripple torque. The control strategy is based on a static output feedback synthesis. The problem is reformulated in the time domain with regard to the main order of the fluctuations. An hybrid propulsion complete modeling is achieved from an experimental benchmark. The model is performed at low speed (900 rpm). In fact, at this speed, the ripple is very restrictive. Simulation results highlight the control approach interest.