科创中国

原文链接：万方

• 摘要：

  The existing research of the active suspension system(ASS) mainly focuses on the different evaluation indexes and control strategies. Among the different components, the nonlinear characteristics of practical systems and control are usually not considered for vehicle lateral dynamics. But the vehicle model has some shortages on tyre model with side-slip angle, road adhesion coefficient, vertical load and velocity. In this paper, the nonlinear dynamic model of lateral system is considered and also the adaptive neural network of tire is introduced. By nonlinear analysis methods, such as the bifurcation diagram and Lyapunov exponent, it has shown that the lateral dynamics exhibits complicated motions with the forward speed. Then, a fuzzy control method is applied to the lateral system aiming to convert chaos into periodic motion using the linear-state feedback of an available lateral force with changing tire load. Finally, the rapid control prototyping is built to conduct the real vehicle test. By comparison of time response diagram, phase portraits and Lyapunov exponents at different work conditions, the results on step input and S-shaped road indicate that the slip angle and yaw velocity of lateral dynamics enter into stable domain and the results of test are consistent to the simulation and verified the correctness of simulation. And the Lyapunov exponents of the closed-loop system are becoming from positive to negative. This research proposes a fuzzy control method which has sufficient suppress chaotic motions as an effective active suspension system.

• 关键词：

  chaos control fuzzy active suspension system vehicle lateral dynamics

• 作者单位：

  School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China

• 基金项目：

  National Natural Science Foundation of China(Grant .50875112,51275002)%PhD Programs Foundation of Ministry of Education of China(Grant20093227110013)%Jiangsu Provincial Natural Science Foundation of China(Grant BK2010337)%Natural Science Foundation of Higher Education of Jiangsu Province of China(Grant09KJA580001)

• 来源期刊：

  中国机械工程学报

• 年，卷(期)：

  201427004