Multi-Functional Loader Steering Hydraulic System model construction and simulation Based on Power Bond Graphs

Hydraulic steering system has been extensively applied in small type of loader and other engineering vehicles do to its special superority, how to forecast its dynamic behavior in design stage is most impotant problem. This paper firstly analyse a typical steering hydraulic system of multi-functional loader, and construct its powder bond graphs, then decuce its state equations.with these equations, some hydraulic component have been encapsulated in soft Mworks, at last, a simpled steering hydraulic dynamaic simulation model was constructed by these components, and some characteristic curves of system can be easily abtained.