基于周期平均的固定翼双旋弹弹道修正方法

Trajectory correcting method of fixed-canard dual-spin projectiles based on period average

针对一种滚转稳定的固定翼双旋弹,提出了一种平均控制力大小可调节的弹道修正方法,并据此设计了该弹的制导与控制方法。根据固定翼双旋弹的高速旋转特性,在对其角运动方程进行简化后进行角运动分析,得到了弹体的合法向力与固定鸭舵偏转角度之间的关系,然后基于周期平均的概念提出了一种弹道修正组件以不同转速、不同振幅旋转以产生大小可控平均法向力的弹道修正方法,并通过六自由度弹道仿真验证了此方法的可行性。分析结果表明,相比于弹道修正组件固定的传统弹道修正方法,这种新型的弹道修正方法可以通过连续地控制平均法向力的大小和方向,实现固定翼双旋弹的制导与控制,消除弹道偏差,提高命中精度。

A trajectory correcting scheme in which the value of the average control force can be regulated is made for a fixed-canard dual-spin projectile which is spin-stabilized. Hereby the guidance and control system of the projectiles is devised. Based on the high-speed rotation characteristic of fixed-canard dual-spin projectiles, the angular motion equation is simplified, and the angular motion is analyzed. Then the relation between the resultant normal force and the deflection angle of canards is obtained. Afterwards, a trajectory correcting method, whose trajectory correction component rote in diverse rotational speed or diverse amplitude to produce the average normal force whose value is controllable, is proposed based on the concept of period average. And the feasibility of the method is validated by 6-DOF ballistic simulation. The results indicate that, compared with the traditional method whose trajectory correction component is fixed, the new trajectory correcting method can continuously control the value and direction of the average normal force, thus the guidance and control of fixedcanard dual-spin projectiles is realized so as to eliminate the trajectory deviation and improve the precision.