瞬态力矩平衡揭示高旋弹鸭翼对弹道的影响

Ballistic Influence Analysis of Spin-stabilized Projectiles Canard Based on Transient Balance Theory

针对鸭翼偏转方向与弹道改变方向相反的现象,提出了基于瞬态力矩平衡原理从理论上揭示高旋弹鸭翼对弹道的影响。通过分析弹体在瞬态平衡状态下的受力情况得出了弹体受到的法向力是改变弹道轨迹的直接因素。仿真验证结果表明:弹体受到的法向力与弹体压心到质心的距离成反比,与鸭翼和弹体压心间的距离成正比,与鸭翼上的法向力成正比,弹道改变量与鸭翼上的法向力方向相反;对于翼面确定情况,为了增加弹道的改变量,需要加大鸭翼压心和弹体压心之间的距离,若鸭翼与弹体压心重合,无论鸭翼如何偏转,都不会改变弹道。

According to the phenomenon that the direction of deflections of the canard is opposite to the direc-tion of the traj ectory changes,we proposed a principle based on the transient torque equilibrium,theoretically revealed the influence of the high spin canard on the proj ectile traj ectory.By analyzing the force of the proj ectile under transient equilibrium,we obtained that the normal force of the proj ectile was the direct factor of traj ectory changing.The simulation results showed that the normal force of proj ectile was inversely proportional to the dis-tance between the center of proj ectile pressure and center of mass,proportional to the distance between the cen-ter of proj ectile pressure and the center of canard pressure,proportional to the normal force of canard.With a certain canard,the quantity of ballistic shift which was in the opposite direction to the normal force of canard could be enlarged by increasing the distance between the center of proj ectile pressure and the center of canard pressure.However,if the canard and projectile pressure centers were overlapped,whatever canard deflection, the ballistic would not change.