Under the special situation of lateral wind disturbance, the lateral direction was resulted from the conventional obverse control strategy and influenced the vehicle stability. The 2-DOF full-vehicle model with the lateral wind disturbance and EPS dynamic model were designed. Reverse control strategy was designed where the EPS motor provided active steering control to prevent vehicle deflection with the input signal of steering torque under the lateral wind disturbance. In the EPS working process, the reverse control strategy and obverse control strategy were switched according to the drive situation to obtain the best vehicle stability. Anti-disturbance simulation was executed and the results shown that the yaw rate, the slideslip angle, the lateral acceleration and the lateral displacement have been weakened, and the vehicle stability is enhanced. The design of reverse control strategy has engineering significance to the overall design, function enhancement and optimization and steering manipulation and safety improvement.

The control strategy is one of the key technologies of EPS system, and the assistance characteristic has great importance to the vehicle handiness and road feeling. Based on the EPS dynamic model, the curved assistance characteristic is designed. The curved assistance characteristic has the superiority to find the better balance between handiness and road feeling. It has engineering significance to the overall design, function enhancement and optimization and steering manipulation and safety improvement.

Using the multi-body simulation software SIMPACK as platform, a whole CHANGHE mini-car model was built. A fuzzy controller was adopted based on MATLAB/SIMULINK software to control the full car model. Pulse input running test simulation was carried out under co-simulation of SIMAT. The results showed that compared to passive suspension, with the speed 40km/h, the body vertical acceleration, body pitch angular velocity, standard deviation and peak were respectively decreased by 10.76%, 18.03% and 20.48%, 12.13%. The semi-active suspension system with fuzzy controller had better performance than passive suspension, reduced vibration effectively and improved automotive ride comfort.

Ridership forecast of urban rail transport is one of the important bases for urban rail transport network planning, design, construction and operation. MAS-based ridership forecast system was designed and the architecture was proposed. Forecast model is one of the important parts of Forecast Agent, and is the key technology to realize ridership forecast. The forecast model is established from the aspect of mode split model based on improved Fore-stage iterative feedback method. The mode split model includes three aspect of resident population, floating population and bus sub-way. The design of mode split model provides the prerequisite for the design and development of ridership forecast system.

This paper is concerned with the power and fuel economy performance simulation study of power splitcontinuously variable transmission(PSCVT). Firstly, mathematic model of PSCVT is established and the shifting rule is designed based on the introduction of PSCVT working principle; Secondly, the fuzzy-PID controller is designed according to the control requirements of electronic control system; Thirdly, the vehicle model with PSCVT and engine model are established to carry out the PSCVT power and fuel economy performance simulation. The simulation results indicate that the vehicle fuel consumption with PSCVT is reduced distinctly with the same power performance.