All Terrain Pneumatic Suspension Output Characteristic Analysis

All-terrain crane is well developing in the field of engineering technologyin our country in recent years. The crane which is equipped with a complicatedelectrically controlled hydraulic system can trudge for a long distance and hoistheavy stuff. Electrically controlled hydraulic shock mitigation system of hydropneumatic suspension(HPS) is the core function and technology of chassiselectrically controlled hydraulic system. This paper focuses on hydro pneumaticsuspension, in which hydraulic liquid is used as the medium. High-pressure inertgas inside can efficiently absorb the vibration and impaction, thus a goodstability can be assured. HPS is widely used in multiple-axle vehicles generally.Based on vehicle dynamics, engineering hydraulic hydromechanics andthermodynamics, main research contents of this paper are as follow:(1)Nonlinear mathematical model of hydro pneumatic suspension isestablished, concrete parameter characteristics of structural elements in thesystem during working cycle are analysed by using the programming simulationsoftware of MATLAB.(2)Dynamic mechanical model of hydro pneumatic suspension-a fourdegree-of-freedom1/2dynamical mathematic model and mechanical model areestablished by using MATLAB/simulink. The varieties of dynamic parametersof suspension system, such as displacement, velocity and accelerometer invertical orientation under the condition of the left and right side wires are onpavements of different levels are analysed.(3)Allied double-chamber HPS on single axle is analysed. A hydraulicsystem model is established through the professional hydraulic simulationsoftware of AMESim. Output characteristics of velocity, accelerometer anddisplacement in vertical orientation as well as vibration reducing performanceare analysed and researched through the simulation.