1. 研究目的与意义（文献综述）

vehicle handling stability is one of the most important performance of the car,it is a hot issue of automotive safety technology theory,not only does it affects the convenience of driving a car,but also it is a major performance whether the vehicle drives safely.with the continuous improvement of highways and road conditions,drivers often drive at very high speed,the maximum speed of modern car is designed generally more than 180km/h,there are also many accidents on the highway due to vehicle out of control,in recent years people's living standards are also rising,the density of vehicles on the road is growing,the accident rate increased year by year,so vehicle handling stability get more and more attention,and studying vehicle handling stability has very important significance.the simulation analysis of the vehicle's handling stability is a method to simulate the vehicle's handling stability by using computer software(such as adams,matlab,etc.).this method does not need to carry out the actual vehicle experiment,but only need to set up the simulation model on the computer,and the simulation results also have a high reliability,so the simulation analysis method has been widely used.

at present,there are many cases of simulation analysis for vehicle handling stability at home and abroad,and the software used for simulation is also different.dalian university,liang changfei,li yuguang,who simplified the car into a linear two-degree-of-freedom monorail model with lateral motion and yaw motion,and based on matlab/simulink to analyze front wheel angle step input of handling stability.hefei university of technology,peicheng shi and others based on admams to establish model of car steering system,front suspension system,rear suspension system,front tire system,rear tire system and body system six independent subsystems,establish control unit in the matlab environment,then simulate at the joint of adams and matlab.in the foreign countries,many simulation research of the vehicle handling stability is based on eps,esp,dyc and other systems,which is aimed to achieve the purpose of improving vehicle handling stability,such as isah sagir tukur based on the esc system,making use of carsim to establish vehicle model and use matlab-simulink to analyze,then compare the yaw rate and lateral acceleration of vehicles with and without esc,they got the conclusion that esc can significantly improve the vehicle's handling stability.

however,most cases only consider the two degrees of freedom which are lateral movement and the yaw movement of the vehicle.,although this model is simple and can summarize the main operating characteristics of the vehicle,the vehicle's roll motion which is closely connected with vehicle handling stability and ride comfort is also an important research object,this paper establish the three-degree-of-freedom vehicle control simulation model which includes the vehicle roll motion has a certain reference value for studying vehicle handling stability.

2. 研究的基本内容与方案

a.the basic content,objectives

(1)overview of objective evaluation methods for vehicle handling stability.

(2)the model of the simplified coordinate system and the equivalent mechanical model of a suv are established,and the lateral motion of the vehicle,the yaw movement and the roll movement of the vehicle are analyzed.

3. 研究计划与安排

4. 参考文献（12篇以上）

1.游彩霞.eps系统对车辆操纵稳定性影响的仿真研究[d],长安大学,硕士学位论文

2.付越.电动轮汽车平顺性和操纵稳定性仿真[d],吉林大学,硕士学位论文

3.朱亚伟,尉庆国.基于matlab/simulink的四轮转向汽车操纵稳定性仿真[j],汽车实用技术,2016年第2期：p67～69