Simulation Analysis And Optimization Of FSC Car Handling Stability Based On ADAMS

As one of the important performance of vehicle, steering stability directly determines thesensitivity and accuracy of vehicle control response, and good steering stability is thefoundation of endcontest in the Formula Student China. The method of multi-rigid-bodydynamics is often adopt in the car’s steering stability analysis. Parts will be deformed, whenload is too large. At this point the conclusion basisd on the rigid body assumption will bedifferent from the actual situation. In order to solve this contradiction, this paper adopts thecoupled modeling theory, and analysed the steering stability of car.Front and rear suspension, steering, tires, power, braking, body and other subsystems areset up based on FSC racing car’s design parameters of liaoning university of technology byAdams software with the multi-body dynamics theory. Secondly mnf files, produced by finiteelement software Hypermesh, are imported into the Adams software to establish the coupledsuspension system. Suspension kinematics characteristic is analysed by running parallel wheeltravel simulation, and suspension system is optimized with Adams/Insight module. Afteroptimization the change trend and scope of the caster angle, kingpin inclination angle, camberangle and other wheel alignment parameter value, are more reasonable and conform to thedesign expectations. Finally, each subsystem assembled into the vehicle model, and theeffectiveness of the model is verificated based on the contest data. Reference the relevantnational standard of vehicle handling stability, steady state turning test, crawling experiment,steering wheel angle step input and steering return-to-center performance test are finished.And then, the score is evaluated with reference to relevant national standard. The researchprovides a more comprehensive design basis for the development of racing car.