计转数定距引信炸点散布精度分析

The Accuracy Analysis of Burst Point Dispersion for Turns-counting Fuze

计转数体制是实现引信精确定距起爆控制的重要手段之一。从理论上分析,计转数引信可以不用测初速V0,就可在炮口近距离内通过计测弹丸的转数得到弹丸的行程X。但实际上每发弹丸初速是不同的,且射程不同,射角不同,具有不同的弹道,这就意味着弹丸旋转遇到的阻尼也不同,因而弹丸旋转角速度变化的规律不同,因此,由转数定距只能是近似的。文中对于在不同射距上,对计转数定距引信作用的散布精度进行了初步的论证,并针对弹丸初速和阻尼系数对弹丸转数影响进行了计算机仿真计算,还进行了不同初速及不同阻尼系数条件下弹丸转数的误差分析,从理论上论证了计转数传感器定距的可行性。

Turns-counting technology is one of the important method to realize fixed-distance burst accurately. From theoretical analysis, to turns-counting fuze, the distance of projectile X could be given through measuring the turns on the muzzle without the velocity VO. But in fact, every projectile has the different velocity, range, elevation angle, ballistic curve and damping, so the rule of angular velocity is also different. In this paper, in the different range, the burst point dispersion accuracy is analyzed. The simulation compulation for the effect of muzzle velocity and damping factor on turns of the projectile and the error analysis of turns-counting under different muzzle velocity and damping factor are made, so the feasibility of the turns-counting is discussed theoretically.