Abstract:The full hydraulic steering control unit is the core of the hydraulic steering system, which has a major impact on its performance. According to the internal structural characteristics and working principle of the full hydraulic steering control unit, the static mathematical model of the hydraulic steering gear was established, and the relation between the flow orifice area and the stream was obtained. The mathematical model was built based on the transfer function method, and the effects of the various factors on the device operating characteristics were analyzed. The full hydraulic steering system simulation model was established based on AMESim, and the dynamic characteristics of the system was analyzed. Through the model, the dynamic characteristics of the steering control unit, steering rod, tires and other key components were compared. The influence laws of the structural parameters of the hydraulic components and system parameters change on the system static and dynamic characteristics were analyzed. The full hydraulic steering system test bench was built, and the reliability of the analysis results was verified by experiments. The results provide a reference for the design of such research.