Abstract:Aimed at a full hydraulic steering system with flowamplifier of mining dump truck, modeling and simulation characteristic analysis were researched. The research was based on the steering system of XGE400 mining dump truck as an object. According to structural principle of the system, its static characteristics were analyzed, and simulation model of the dynamic characteristics of the system was built by using AMESim, with a different step signal as input stimulus, the system dynamic characteristic curve with changes was gotten. And a test bed was built for the system, its performance was tested and verified, and results obtained by the two methods were analyzed and compared. The results show that change of experimental data and simulation data is consistent. The established simulation model is accurate and reliable, which can be applied in practical design and optimization of products.