Coach Handling Stability Dynamics Model

By analyzing the structure and dynamics characteristics of coach-bus, analyzing and researching the relative roll movement of passengers, basing on the five-degree of freedom truck dynamics model, six-degree, seven-degree, nine-degree, (5+n) degree of freedom coach-bus dynamics models are founded for the coach-bus. The paper develops computer simulating software for each model with MATLAB language. By comparing and analyzing the simulated result from the software and the result of experiments on the road, the dynamics model is ascertained which is best adapted to studying the maneuverability and stability of the high-speed coach-bus. The influence analysis is achieved for maneuverability and stability of the coach-bus while the angel stiffness of it's lateral stable pole or the position of gravity center is changing. The paper discusses the difference between coach-bus load and truck's or car's, considers the influence of maneuverability and stability of the relative roll movement of passengers.