Modeling and Simulation of Vehicular Power Systems - webfiles its ...

1 IntroductionNowadays electric and hybrid vehicles are being more and more placed in the center ofattraction because of the importance of shortage in fossil fuels. As simulation andmodeling of different hybrid and electric vehicles plays an important role before thedesign and manufacturing process, having a simulation environment which includesdifferent models for components used in drive train could be really beneficial [8].To havea good simulation environment, it is needed to make a library of models of componentsexist in the drive train of vehicles. There are so many simulation programs being used forstudy and analysis of different drive trains [8], [6]. Different components in the drivetrain of hybrid vehicles are modeled with different methods [7], [8], [1], [4].Theimportance and benefit of having a simulation environment is discussed in [5], [22].In[15] some methods to model internal combustion engines is discussed. In [17], [18], [23],[24], different methods to simulate batteries is given and discussed. The energymanagement and control strategies used in hybrid drive trains is presented in [14].In [1],[2], [3], [7], [9] some methods for modeling of electric machines are given. As the wholedrive train of hybrid vehicles is a combination of electric and mechanical components,the dynamic modeling of the vehicle and mechanical parts is in the aspect of interest. In[4], [8], [10], [11], [12] and [13], the dynamics of the vehicles and how to model it isdiscussed.1.1 Objective of the thesisThe purpose of this thesis is to provide some tools and methods for modeling andsimulation of components used in drive trains of hybrid vehicles. A goal is to introduceprinciples of simulation and the methods used for simulation of vehicular power systems.It is desired to create a simulation model for different components used in vehicle drivetrain. Different methods used to model vehicle dynamics, batteries and electric motors,engine is given. Altogether making a simulation environment to show the importance ofmodeling and simulation of vehicular power systems is one of the main objectives of thisthesis.1.2 Thesis outlineThis thesis is arranged in nine chapters. The first chapter, which constitutes theintroduction, provides the aim and scope of the thesis and what is done to accomplish theaims.Chapter 2 includes some theoretical background of hybrid vehicles and clarifies theimportance of simulation and modeling of vehicular power systems.Chapter 3 focuses on the basic and principles of simulation and modeling. Somesimulation tools which are used for vehicles simulations and comparison of them isgiven.1