中文摘要：

阐述了一种基于自适应模糊控制的拖拉机自动导航系统。由PLC、电控开关液压阀和比例方向液压阀组成自动转向控制系统,设计了PD转向控制算法;为提高拖拉机自动导航的精度和稳定性,提出了一种基于遗传算法的自适应模糊控制方法,采用遗传算法在线优化模糊控制规则以及输出比例因子,既保留了传统模糊控制的优点,又有效改善了系统的控制品质;仿真和田间试验结果表明,该方法可以迅速消除跟踪误差,响应速度快,超调小,系统工作稳定,稳态跟踪误差不超过10 cm。

英文摘要：

An autonomous navigation system based on self-adapted fuzzy control for agricultural tractor was proposed.PLC,electro-hydraulic switch valve and proportional directional control valves were used to construct the automatic steering control system based on PD control algorithm.A self-adapted fuzzy control algorithm was proposed,GA was adopted to optimize the fuzzy rules and proportion factor of fuzzy output online.It retained the advantages of conventional fuzzy control, and meanwhile,it improved the performance of autonomous navigation control system.Simulation and field experiment indicated that the proposed navigation control algorithm could eliminate the tracking error effectively with rapid response and small overshoot,the navigation system worked stably,the maximum tracking error was less than 10 cm.