Automatic Navigation Of Intelligent Agricultural Research

China is a large agricultural country, but also a populous country, China’s agricultural security is essential. Development of agricultural modernization is the inevitable trend of the future of agriculture, agricultural development is an important foundation for the automatic navigation modernization of agriculture, agricultural autopilot can increase agricultural output, improve land utilization, reduce losses, and can greatly reduce the labor intensity of the driver. The realization of agricultural hydraulic steering is one of the key technologies of agricultural automatic navigation, this paper is to design a set of agricultural navigation algorithm can automatically verify a set of hydraulic system, prepare the ground for the development of agricultural automatic navigation system.First, this paper analyzes two hydraulic steering system used on the tractor, the first one is a mechanical hydraulic power steering system, the other is a full hydraulic steering system. On this basis, we propose a model based on the vehicle’s hydraulic steering system. According to the basic principle of hydraulic steering, hydraulic components and reasonable selection, the hydraulic model to achieve practical performance car steering tractor steering system.Secondly, a good selection of hydraulic steering system hardware based on the realization of the hydraulic steering control system circuit design, the main power configuration of the hydraulic system, the angle sensor signal acquisition circuit, the three-way solenoid valve proportional control circuit; in the underlying hardware control circuit, select linux + ARM + QT development environment designed model car steering control system control software, including the angle sensor signal acquisition program, proportional solenoid valve control software program, the next crew PID algorithm angle response procedures.Again, in the estimation of the parameters of the PID algorithm problem, according to the characteristics of the hydraulic system, using conventional ZN tuning methods, their parameters to make calculations based on the initial setting, then use matlab simulink module PID parameters under simulation system has been under Finally, further adjustments to the test parameters of the simulation obtained by the front, to obtain PID control performance parameters under actual conditions.Finally, to test the system performance of the hydraulic system in the school library plaza to do the experiment, the results of the experiment described in the installation of the hydraulic model of the vehicle steering control system, in response to the tracking angle with the PID algorithm, the model car response speed, accuracy and stability with good results, the final results showed that the path tracking, tracing the path of the hydraulic steering system effects model car is good, the lateral error is small and stable performance.