Design and Experimental Study on Motor Type Automatic Driving System of Agricultural Machinery Based on Beidou Navigation

To overcome the problems of machine matching and environmental adaptability existing in the automatic driving technology of agricultural machinery, this paper proposed a automatic driving system of motor type agricultural machinery, and introduces the system's composition, working process and control strategy from the overall level. A coaxial angular displacement measuring device is innovatively designed, which improves the matching of machine tools. An innovative GNSS/INS/vehicle combination navigation method is proposed to reduce the accuracy requirement of inertial measurement unit and improve the environmental adaptability of the system. In order to reduce the working intensity of agricultural mechanics, humancomputer interaction interface is designed to make the manipulation more concise and clear. The indexes of straightness accuracy and spacing accuracy of connecting lines are put forward to evaluate the system operating accuracy, and the experiments are carried out. The results show that the straightness accuracy is 1.678 cm and 1.965 cm under the two different speeds of 0.5m/s and 2.5m/s, and the accuracy of connecting line spacing is 2.428 cm and 2.525 cm. The operation accuracy is high.