Modeling and Simulation Research on the Hydraulic System of the Blade of an Unmanned Bulldozer

In response to the operational characteristics of unmanned bulldozers, a model of the hydraulic system and physical mechanism of the bulldozer blade was constructed using AMESim software. This paper discusses the modeling process, sets the main parameters of the model, and simulates the dynamic behavior of the hydraulic system and the two-dimensional motion of the mechanism during the processes of digging, pushing, unloading, and resetting of the unmanned bulldozer blade. The simulation curves of pressure, flow rate, and displacement for the lifting and tilting hydraulic cylinders of the blade were obtained. A detailed analysis and comparison of the simulation results were conducted, verifying the accuracy of the model. The study demonstrates that the model improves the operability of the unmanned bulldozer, enabling smoother operation. Additionally, the correctness of the simulation model was validated, which is significant for achieving trajectory planning of the blade.