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The design of agricultural machinery navigation autopilot system for practical problems includes double RTK-DGPS receiver, navigation tracking controller, intelligent control terminal, the steering Angle sensor, automatic steering control valve group and other parts. According to the functional requirements, system adopts hierarchical control strategy, through the embedded Linux software and ARM development board, for modular design such as high precision positioning and automatic operation control, wireless communication, display, integrated data communication, navigation path tracking, vehicle key parameter setting, data storage, playback and other functions. The engine test results show that the positioning accuracy is 4.5 cm, lateral deviation error operation in field trials have shown straight line within 5cm, meet the expected requirement.
Wang et al. (Sat,) studied this question.