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In this paper the Power-Oriented Graphs (POG) technique is used for modelling planetary gears and hybrid automotive systems. The POG technique allows to graphically describe the dynamic model of any type of physical system (in different energetic domains) putting in evidence the power flows within the modelled systems. The POG schemes are easy to use, easy to understand even by a neophyte and can be directly implemented in Simulink. Because of the POG modular structure, complex physical systems can be modelled by composing subsystems models. Following this approach a whole power-split hybrid vehicle is modelled, starting from modelling its main subsystems: planetary gear, multi-phase synchronous motor and vehicle dynamics. Simulation results of the modelled hybrid system are reported at the end of the paper.

Modelling Hybrid Automotive Systems with the POG Technique