单磁的弹丸滚转角测量与系统误差分析

An Analysis on Measurement and Systemic Error of Projectile Roll Angle Based on Single Magnetic Method

针对高旋弹丸滚转角实时测量的问题,建立一种单磁的弹丸滚转角测量与误差分析方法。在弹丸发射前装订先验弹道的角度信息,通过时间匹配的方法获取实时的俯仰与偏航角数据;并结合地磁测量信息完成弹丸滚转角的实时解算。通过采用6自由度外弹道的蒙特卡洛仿真和多因素修正控制仿真的方法,完成弹丸在无控与修正状态的先验角度散布规律研究。在考虑时间基准误差的情况下,经系统误差建模与仿真得出,单磁的弹丸滚转角测量方法在无控和一次修正后的系统误差1σ下分别为小于2°和10°。仿真结果表明,基于先验角度信息的单磁弹丸滚转角测量方法可行,可以保证无控和一次修正后的滚转角测量精度。

To realize the real-time roll angle measurement of the correction projectile,a roll angle calculation method based on the single magnetic and a new error analysis method are proposed. The angle information of the scheduled ballistic is set before the launch of the projectile,so that the real-time pitching and yaw is acquired by the way of time mapping,and the roll angle is calculated out with the single magnetic. The dispersion regularity of the predefined angle with and without control is researched by the Monte Carlo simulation with 6 degree of freedom and the simulation in diverse correction situations respectively. With the error of time benchmark considered,a simulation on the systemic error shows that the measurement error of the uncontrolled projectile is less than 2° under the condition of 1σ,while that of a projectile after once correction is less than 10°. According to the analysis,it can be safely concluded that the roll angle calculation method is feasible,and the resolution of the uncontrolled and once corrected projectile can be guaranteed.