Vehicle Handling And Stability Virtual Simulation And Optimization

With the popularization of the automobile, the consumer have higher require to the quality, not only its dynamics and economics, but also handling and ride. To meet these requirement, deeply studying on system dynamics of automobile should be done.The applications of virtual prototype technology help the designers to short the development cycle and reduce the develop cost and risk as well as release the new product of vehicle that have been accepted by the designers widely. The software ADAMS, which developed with multi-body system dynamics, is the most fashionable and authoritative software in the field of mechanical dynamics simulation. Using it the engineers can know about the performance of vehicle in the development period.In this thesis, using the software ADAMS/CAR ,a 135 DOF multi-body system dynamics open loop control model was built. And according to the requests of standards, lots of simulation research of open loop control test, such as steady state cornering test, braking on curve test and so on, were carried on. Then simulation research of closed loop control test, such as slalom test and“8”form driving test, were carried on with the driver control document. Based on the simulation results, we can find that the car possess better returnability, braking performance and so on. But steady state cornering performance and transient response performance is not good. In this thesis, the multi-body system was optimized with three parameters of automobile amending. And the steering performance of automobile was improved obviously.