受油机精确跟踪飞行时的侧向稳定性

LATERAL STABILITY OF A RECEIVER AIRCRAFT DURING PRECISE TRACKING

空中加油过程中 ,在供油机的旋涡系统流场作用下 ,受油机的侧向扰动运动具有不稳定的振荡模态。采用驾驶员传递函数 ,对驾驶员 -受油机闭环系统的稳定特性进行了计算。结果表明 ,按滚转角对飞机进行反馈控制时 ,不能使该不稳定模态变为稳定模态。按侧向位移对飞机进行反馈控制时 ,可以使不稳定模态转变为稳定模态 ,但驾驶员传递函数中的放大系数必须严格控制在某一适当范围内 ,说明驾驶员必须十分精确地操纵飞机 。

The receiver aircraft has a lateral dynamic divergent oscillation mode,when flying in the tanker aircraft's vortex field. In this paper, the pilot transfer function has been used to calculate the stability of the pilot aircraft closed loop system. The result shows that the unstable mode could not be changed into a stable one by using the bank angle feedback control. The unstable mode will become stable if the pilot takes the sideways displacement as the feedback parameter with a moderate gain coefficient in the pilot transfer function. It appears that the pilot must control the aircraft precisely for obtaining the closed loop stability of the receiver aircraft.