| Summary: | 碩士 === 國立臺灣大學 === 機械工程學研究所 === 101 === In-wheel motor may simplify the transmission systems of the vehicle and make a larger car room space allocation, so it is an important direction in the development of vehicle electrification. However, in-wheel motor build-in the unsprung mass, which obviously influence vehicles dynamic. The research will focus on the effect of in-wheel motor and the design method for the electric vehicles to improve the handling and ride comfort of vehicle. This research ,firstly ,is to analyze damping and spring coefficients of second suspension which build-in the unsprung mass and next optimize the second suspension system. Then, this research is to design a new system, called battery dynamic absorbers system base on the dynamic vibration absorbers theory. This system may provide the force ,which lower the vibration of the car body.In order to design Battery dynamic absorbers system, there are characteristics that this study will discuss such as damping ratio, natural frequency and the location of this system. This research will use quarter car and bicycle car model to analyze the influence of this three variables. Finally, this study analyze the data from the simulation, finding the ways of coefficient adjusting, hoping to improve the performance of in-wheel motor electric vehicle.
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