Design And Ride Comfort Simulation Of Electric Car Suspension System

In recent years, the energy crisis and environmental problems grow one and another, fuel automobile is one of the biggest users of energy consumption and it is also one of the main sources of environmental pollution. In order to solve the energy and environmental problems, electric cars step on the stage, it’s energy conservation and environmental protection, low pollution are valued by the government. Because most of the electric car’s suspension parts are fuel car’s modification, the electric motor, battery and some specific transmission devices replaced the engine and some transmission devices. So the quality of the body is relatively increased, and the position of the center of mass is changed. So the original suspension is not a good match of modified electric cars, this will affect the overall performance of the electric cars. So the electric car’s suspension parts need to be redesigned and optimized, to improve the electric car’s performance.In this paper, a electric scooter is researched, so the riding comfort should be payed more attention, and make the suspension to the riding comfort as the starting point. Firstly, explain the multi-body dynamics theory and the method of flexible body modeled in ADAMS. Secondly, design the front and rear suspension based on the vehicle parameters provided by the electric car. The CAD software(CATIA) is used to build the front and rear suspension model. And extract hard point coordinates in CATIA that will be needed when modeling the front/rear suspension system in ADAMS/Car. By using the suspension test bench in ADAMS/Car to complete synthetic beating experiment with ±50mm. The illogical alignment parameters are found while the mini electric car’s front and rear suspension beating with wheels. Set the illogical alignment parameters as test object, use the ADAMS/Insight module to optimize illogical alignment parameters with multi-objective genetic algorithm and make it as far as possible to reach the ideal range. Finally, make the suspension flexible and build the rigid and flexible coupled vehicle virtual prototype model to simulate the vehicle’s ride comfort, then make assessment according to the simulation results of micro electric vehicle’s suspension performance.Through to the vehicle ride comfort simulation it can be seen that the electric car is produced in the process of high speed vibration will cause harm to human body, when low speed won’t appear any adverse phenomenon, thus to meet our design requirements.