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This paper studies the dynamic load problem of the harvester, establishes the mathematical model of the load change of the harvester, also studies the coupling and decoupling of the dynamic load of the harvester, and establishes the coupling model to finally understand the load change before and after the coupling.

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In order to realize the path tracking control of agricultural tractors in field operations in complex environments, this paper designs an automatic driving system based on the Luzhong 500A tractor, and studies the path tracking. The tractor automatic driving system consists of a steering module, a shift module and a pedal module. Based on the simplified dynamic model, this paper uses improved LQR controller to achieve path tracking control, and carries out Carsim/Simulink joint simulation and field tests. The field test results show that the tractor can achieve autonomous driving, and the simulation results show that the controller can achieve path tracking.