LMS vehicle user conference edition:2012 location:Munich, Germany date:18-18 april 2012
Due to the ever increasing energy costs , energy efficiency has become one of the key design parameters in many industries, including the automotive industry. It is of crucial importance to identify the major sources of energy loss in vehicles and their production processes. Since vehicles have evolved into complex mechatronic systems, consisting of components from different engineering domains, a multiphysical analysis approach is expected to hold high potential for system energy efficiency analysis.. In this work, the focus is on the drive train components of a mechatronic system where friction is the leading cause for energy losses. A detailed analysis of the power flow through the system is presented and the different loss sources are identified and represented. The drive train is composed out of a two-stage gearbox, a cam&follower system and a mechanical mechanism which creates an oscillating motion starting from a constant rotational velocity. The system is modeled using the 1D simulation tool AMESim in co-simulation with the 3D multibody tool Virtual.Lab Motion. The basic idea of the adopted modeling methodology is to use the strength of multibody analysis for describing the dynamic behavior of complex motions and the multiphysical nature of 1D modeling to implement energy loss models and the ability to have straightforward interaction between components of mechanical, electrical, thermal or control nature. Due to the fact that the different subsystems are described in one integrated environment, the optimization of the energy efficiency of the system leads to a more global optimum instead of trying to improve the several subsystems independently.