Simulation And Optimization Of The Suspension System Based On Virtual Prototyping Technology

With the increasing popular use of automobiles, customers seek for better and better performance in autos. Good handling and stability are requested, so independent Suspension is widely used in light pick-up truck and passenger car, especially Double Wishbone Independent, Suspensions are developed more quickly. For that, it's very necessary to study Double Wishbone Independent Suspensions.Firstly, we introduce the development status quo of vehicle system dynamic modeling and make a brief description of Multi-Body System Dynamics, virtual prototyping simulation technology, software ADAMS. And we describe the research content and significance. Then applying the modeling parameters and second deployment of ADAMS, the special design analysis and simulation module for double-wishbone independent suspension is established which makes the kinematics and dynamics analysis for double-wishbone suspension efficient and expansion convenient through optimized design for designers to provide optimal design parameters. The research on suspension kinematics was about the parameters, such as wheel orientation that related to suspension which were caused by the relative movement of vehicle body and wheels. Then the output results were researched and evaluated.In order to research how the suspension system affect the vehicle performances (such as handling stability and ride comfort), According to the optimized Double Wishbone Suspensions, the rear Multi-link suspension template, the power-train template, the steering system template, the body template and the tire template, the subsystems are established in standard interface of ADAMS/CAR. Finally, by adjusting the model until the model is reasonable, the ultimate full-vehicle dynamics model of the vehicle has been completed.According to the requirements of the current standards GB/T6323.1-94～GB/6323.6-94 of our nation's for vehicle controllability and stability test, we set up environment needed by the simulation and carry out simulation and analysis for vehicle handling stability such as steering wheel angle step input test, steering wheel angle pulse input test, pylon course slalom test and steady static circular test.The whole research work concentrates on the exploration and application of virtual design and analysis, and assists on the computer program. We have basically achieved the goal--analyzing essential performances of the vehicle on computer. This is of great significance to the reduction of time and cost of design and the increasing of product quality in the process of vehicle design.