基于非线性模型的飞机自动着陆模糊控制系统设计

Design of the Automatic Landing Fuzzy Control System Based on the Nonlinear Aircraft Model

将非线性控制方法与模糊控制方法相结合对飞机自动着陆系统进行了设计。首先,对飞机纵向运动的非线性模型进行输入输出反馈线性化,将其等效为一个三阶线性系统,并同时实现了解耦。在此基础上,结合带优化修正函数的模糊控制规则自调整方法对变换后的三阶线性系统进行设计。最后,考虑参数摄动,对所设计的飞机自动着陆控制系统进行了数字仿真。仿真结果表明,该控制系统能有效抑制系统内部参数摄动对系统输出产生的不良影响。

This paper presents a novel design procedure for the control of aircraft automatic landing system using nonlinear technique and fuzzy control method. Firstly, the original nonlinear model of the aircraft longitudinal motion is linearized to a three-order decoupling system via the input-output feedback technique. A fuzzy control method is then introduced to design the linear system, which is used for self-regulation based on analytically optimal correction function. Finally, simulation examples are given both in normal and in parameter perturbation cases. The results show that the control system has good performance.