| With the increasing of energy shortage and environmental pollution,the development of new energy vehicles based on electric vehicles have become the main way of sustainable development of automobile industry.Among them,electric drive system is the main component of electric vehicle,its technical level directly affects the whole vehicle performance of pure electric vehicle.Based on the research of the electric car dual-mode coupling drive system scheme based on the early,we launched the new drive system parameters matching,prototype development,structure and parameter optimization design and prototype experimental study of carrying.First of all,according to the target vehicle parameters and performance index,the dualmode coupling drive system parameters matching and components selection,and establish the mathematical model of vehicle longitudinal dynamics model and key components.Secondly,the mechanical structure of the drive assembly of the dual mode coupling drive system is designed,and the 3D model is established by using the CATIA software,and the structure checking of the key parts is completed by the finite element analysis software.On this basis,trial prototype is made,and two way test platform is used for bench test,and the efficiency of dual mode coupling system and driving motor is obtained.Then,in order to ensure that the vehicle performance under the premise of improving the travel distance driving cycles,based on MATLAB to establish mathematical model of the drive system parameters optimization problem,using the improved genetic algorithm of the dual-mode system structure and control parameters optimization.Finally,to pick up the dual-mode coupling drive system test prototype of power performance and fuel economy of real vehicle test,verify the dual-mode drive of pure electric vehicle power performance and fuel economy of specific indicators to achieve,and validate the improved genetic algorithm for the feasibility of the dual-mode system parameters matching. |
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