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In this paper, cushion suspension support system of low speed and heavy loading of the gas membrane flow field was in computational fluid dynamics analysis, explore the influence of air cushion suspension of performance support system air cushion structural parameters, and the air pressure in the process of air cushion lift proportional control system for mathematical modeling, thus to control the thickness of air cushion, based on pole assignment self-tuning controller, to improve the response and stability of the system, and the system in this paper the lifting process of air cushion suspension support system are analyzed and the gas film flow state, deepening the theoretical research of air cushion suspension technology.

This paper proposes a calculation method for accurately measuring axle weight, total weight and centroid coordinates of vehicles based on forward tilting method. The composition of the measuring device is elaborated, and the centroid calculation method is proposed.Then the vehicle's centroid height error and error influencing factors are discussed under different conditions. It is concluded that the variation of the centroid error is smaller when the inclination angle of the bearing platform is greater than 12 degrees, so the inclination angle is recommended to be 12~15 degrees. The system is calibrated by standard parts, and the position of the center of mass of the vehicle is actually measured. The repeatability error of the centroid position of the measuring system is calculated to be 0.86 mm, and the relative error when the center of mass height is maximum is 0.1%, which achieves high test accuracy.Therefore, the measuring device can be extended to the actual use field.