| This paper takes the suspension systems of a micro electric vehicle as the research object,on the basis of the data of CATIA3D solid model of the micro electric vehicle, and hasestablished the modeling and verification of virtual prototype of electric vehicle basingdynamics simulation software ADAMS/Car, then the performance analysis and optimizationof suspension system was based on the model, finally through the simulation experiments ofvehicle ride comfort and handing stability to verify the optimization results. The concreteresearch contents are as follows:Firstly, the paper gives an overview of the multi-body dynamics theory, and brieflydescribes virtual prototyping technology and the main features of ADAMS related module.Then, each system model has been established in ADAMS/Car Template module, andchecked for matching between system model and each model and experiment bench. Thevibration tests were completed respectively by real vehicle in the Amber vibration platformand virtual prototype in the four-post test rig with the same settings of experimentalconditions, and comparative analysis has been done with the experiment results of the realvehicle test and the virtual prototype test, to verify the correctness of the developed models.Secondly, taking the virtual prototype model as the basis, the double wheels travelling inthe same direction±50mm tests were carried out respectively by the combination of the microelectric vehicle suspension system simulation model and suspension system test platform inADAMS/Car, to find out unreasonable wheel alignment parameters of the micro electricvehicle front and rear suspension systems changing along with wheel run out. With theunreasonable parameters as test object, multi-objective genetic algorithm was adopted tooptimize the parameters with ADAMS/Insight module, making them to achieve variationrange as ideal as possible.Finally, the virtual prototype models with before and after wheel alignment parametersoptimization were performed respectively simulation experiments of vehicle ride comfort andhandling stability, to evaluate the performance of the micro electric vehicle according to theexperimental results. |
