Modelling, analysis and comparison of hydraulic drive configurations for the front wheels of an all wheel drive motor grader

The subject of this study is the hydrostatic driving system that will drive the front wheels of a motor grader vehicle whose rear wheels are driven by a diesel engine. This system, referred to as All-Wheel-Drive, will increase the traction force and operating efficiency of the vehicle. The hydraulic components required for the system are characterized and calculations of the hydrostatic system and hydraulic circuit diagram are included. The hydrostatic system is modeled in Matlab / Simscape environment and the outputs are compared with theoretical calculations. In addition, the mathematical model of the motor grader vehicle and hydrostatic driving system was created in Matlab / Simulink environment. Feedforward control and feedback linearization are used in the controller design based on torque control. The test results of the system applied on the motor grader vehicle were compared with the simulations and the hydrostatic drive system was verified.