尾翼弹平面非线性运动的极限环

THE LIMIT CYCLE OF PLANAR NON-LINEAR MOTION OF FINNED PROJECTILE

本文研究了具有小阻尼和弱非线性静力矩的尾翼弹的平面非线性运动。用稳定的极限环解释了某些尾翼弹可以产生自激振动;用不稳定的极限环探讨了某些尾翼弹掉弹的原因。为了减小自振的影响和消除偶然掉弹,应增大阻尼力矩和升力的非线性部分,减小阻力的非线性部分。

In this paper, non-linear motion of finned projectile with small damp and weak non-linear static moment has been studied. Using the stable limit cycle, it has been explained that some finned projectiles probably produce self-oscillation. Using the unstable limit cycle, the causes of the fortuitous fall of some finned projectiles have been discussed. In order to decrease the influence of the self-oscilation and eliminate the fortuitous fall of the finned projectile, the non-linear part of the damping moment and lift must be increased, and the non-linear part of the drag must be decreased.