带微型扰流片旋转稳定弹外弹道建模与仿真

为发展修正能力更强的有控旋转稳定弹,研究了一类带有微型扰流片控制机构的旋转稳定弹。分析了该类有控弹的控制原理,针对其动力学建模问题,考虑气动非对称,建立了带扰流片旋转稳定弹的控制力和控制力矩数学模型。根据六自由度弹道模型,仿真分析了扰流片外露高度和弹丸射角、初速及启控时间对速度、弹丸稳定性和修正能力的影响。结果表明:扰流片外露高度越高,修正能力越强,但速度降越明显,攻角振荡幅度和稳态值越大,稳定性越差; 速度从亚音速向超音速变化时,修正能力先减小后增大。

Modeling and Simulation of External Trajectory ofSpin-Stabilized Projectile With Micro Spoiler

In order to develop a kind of controllable spin-stabilized projectile with stronger correction ability,a kind of spin-stabilized projectile with micro spoiler control mechanism was studied. The control principle of this kind of controlled projectile was analyzed. Aiming at its dynamic modeling problem,the mathematical model of the control force and the control torque of the spin-stabilized projectile with spoiler was established by considering the aerodynamic asymmetry. According to the six degree of freedom trajectory model,the effects of the spoiler height,projectile angle,initial velocity and start-up and control time on the stability and correction ability of the projectile were analyzed. The results show that the higher the spoiler height is,the stronger the correction ability is,but the more obvious the speed drop. The larger the oscillation amplitude and stability value of the attack angle are,the earlier the start-up and control time is. When the velocity changes from subsonic to supersonic,the correction ability first decreases and then increases.