Abstract
Based on the theory of vehicle steering dynamics, a model of linear two-DOF vehicle handling stability was established in MATLAB / Simulink environment. Simulation analysis of state variable response such as vehicle yaw velocity and side slip angle was made under different vehicle speed conditions for step-input of front-wheel turning angle. The response curves of the state variables in the time domain are obtained under three vehicle speeds. The results show that the response curve of simulation is in good agreement with the actual situation, which not only verifies correctness of the established vehicle handling stability model, but also provides theoretical basis for subsequent design of handling stability control system.
Highlights
Vehicle handling stability is one of the important characteristics of vehicle, which directly affects driving convenience, vehicle dynamics and driver and passenger safety[1]
In the study of vehicle handling stability, yaw velocity and slip angle are generally considered as the optimal state variables to describe vehicle dynamics stability[4], which reflect vehicle stability from different sides
Vehicle handling stability has a direct impact on steering characteristics, power output characteristics, driving safety, etc., so it is necessary to carry out further research on it
Summary
Vehicle handling stability is one of the important characteristics of vehicle, which directly affects driving convenience, vehicle dynamics and driver and passenger safety[1]. Vehicle handling stability includes two parts of controllabitity and stability. Controllabitity refers to the extent to which the vehicle is able to respond to driver’s steering commands when the driver does not feel tired or nervous. With the continuous improvement of vehicle speed, research on vehicle handling stability has attracted increasingly wider attention [2,3]. In the study of vehicle handling stability, yaw velocity and slip angle are generally considered as the optimal state variables to describe vehicle dynamics stability[4], which reflect vehicle stability from different sides. The vehicle yaw velocity and side slip angle changes were compared and analyzed under different vehicle speeds at front wheel turning angle step input.
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