The Controllability And Stability Research Of RX6400 SUV

As suspension system is a complex multi-body system, the movement relations between parts is very complicated, which brings much difficulty for analyzing suspension's performances by traditional calculating methods. Based on mechanical CAD design and virtual prototyping simulation technology, this paper analyze a RX6400 SUV and analyze the suspension parameters' variation rule using ADAMS/Car software.Based on the above, the author built Mcpherson front suspension and 5 link rear suspension of RX6400 SUV, evaluated the performance of the front suspension, and optimized it's composition by ADAMS/Insight. At the same time, analyzed and evaluated the rear suspension, obtained the optimized result. Based on the feasibility of the model, the author discussed what kinds of influence on handling stability of full vehicle exercised by the composition of the rear suspension.After building the full vehicle virtual prototyping simulating modal including the front and rear suspensions, carried out simulation and analyses for vehicle handling and stability such as steering wheel angle step input test, steering wheel angle impulse input test, return ability test and steady static circular test according to the demands of GB/T6323.1-94～GB/T6323.6-94, and evaluated the car's handling stability performance by scoring according to GB/T 13047-91 .The research showed that: the design of the Mcpherson front suspension is illogicality, it meets demand after being improved. carried out simulation and analyses for vehicle handling and stability such as steering wheel angle step input test, steering wheel angle impulse input test, return ability test and steady static circular test, I Draw a conclusion that this SUV could get upstanding transient state and steady state at the pristine center of mass, and it had upstanding controllability and stability.By using powerful many-body dynamics emulation software ADAMS, we can achieve synchronization of the optimization design. And in the case of specified performance, the costs are immensely brought down.