The main research work of the thesis is summarized as follows : 1 . the improved fuzzy logic control method the phenomenon of steady - state errors and flutter exists in the traditional fuzzy controller . an improved fuzzy controller without quantilizing is presented 地形跟随飞行控制律设计针对某型飞机应用控制航迹角法和控制法向加速度法对不同的反馈信号分别设计了pi控制器和模糊控制器,并做了仿真比较与鲁棒性验证。