Dynamic Simulation And Structure Optimization Of Micro-electric Vehicle Suspension System

Currently most of the domestic pure electric vehicles are modified and designed onthe basis of similar model traditional internal combustion engine vehicle chassis. Becausethe traditional internal combustion engine vehicle and pure electric vehicles have a verybig different in various types of body assembly system, which improved pure electricvehicle centroid position and body system layout changes will significantly reduce the ridehandling and stability of electric vehicles and automobiles. We must simulate and optimizethe structure of the suspension system to improve every performance of the micro electricvehicles and develop the dedicated suspension system.Based on the early development of the electric vehicle laboratory Tangshan miniatureelectric vehicles, established a suspension virtual prototype model in CATIA, andmeasured coordinate installation space of the hard point of all parts. Established thesuspension system with the measured data, then simulated and optimized the structure ofthe former Macphersan independent suspension system in ADAMS. With the optimizedsuspension system, build a full vehicle multi-body dynamics model in the special moduleof ADAMS/Car. Based on the typical road and random road as the road surface input, ridecomfort simulation experiment is on vehicle virtual prototype. By analyzing each systemof the car which impacts on the ride comfort to improve the car ride comfort. It establishedthe front and rear spring stiffness and shock absorber damping constraints of thesuspension system. It optimized the ride comfort of the full vehicle with the orthogonalexperimental method. Finally, obtaining the influence order of the suspension systemparameters to the ride comfort of this electric vehicle and get the relatively optimalmatching solution.The results show that the suspension system optimized of the car reduces the tirewear, lets the steering more flexible and portable, and ensures the ability of the carmoving in a straight line and so on. The optimized suspension parameters matchingmakes the car drive more smoothly, greatly improved this micro electric automobile ridecomfort, it guides the optimization direction to further improve the ride comfort.