双旋静稳定弹的共振不稳定研究  

Research on Resonance Instability of Dual-Spin Static Stability Projectile

作　　者：张衍儒[1] 肖练刚[1] 邱奕[1] 周华[1] 

机构地区：[1]北京航天自动控制研究所,北京100854

出　　处：《航天控制》2016年第3期31-35,共5页Aerospace Control

摘　　要：由于双旋弹的鸭舵和弹体相对旋转,非对称固定翼鸭舵方位角的改变干扰了双旋弹角运动的周期,如果这个干扰的频率与弹体自由摆动的频率相同就会发生共振,共振的出现使攻角突增或发散,造成飞行不稳,这种不稳定称为共振不稳定。本文分析了双旋静稳定弹角运动方程,讨论了共振不稳定的特性。研究可知,攻角运动的振幅与固定翼鸭舵的转速和双圆运动的两个频率有关,固定翼鸭舵转速的不合理可能引起攻角运动的发散,而保持固定翼鸭舵转速远离双圆运动2个频率可以有效避免双旋弹的共振不稳定。Due to the relative rotation between the canards and the body of the dual-spin projectile, the angular periodic disturbance of the dual-spin motion is formed by the rotation of fixed canards. If the frequency is the same as the body vibration frequency, the resonance occurs and then the angle of attack is increased by resonance which results in flight instability, therefore, this instability is called resonance instability. In this paper, the characteristics of resonant instability are researched by analyzing the angular motion equation of dual-spin static stability projectile. As the research reveals, the amplitude of the angle of attack is related to the speed of the fixed canards and the two frequencies of two-circle movement and the divergence of the attack angle is caused by the unreasonable spin speed of fixed canards, and when the spin speed of the fixed canards is far from the two frequencies of two circular motion, the resonance instability can be avoided effectively.

关 键 词：双旋静稳定弹 共振不稳定 固定翼鸭舵 双圆运动 

分 类 号：TJ412.1[兵器科学与技术—火炮、自动武器与弹药工程]