【摘要】 弹道修正弹药的滚转角度是必不可少的重要参数,通过三轴正交磁强计测量弹丸旋转时的地磁场数据,根据B2AC椭圆估计方法,将旋转弹丸内的磁场按照椭圆轨迹进行拟合。在有章动角情况下,根据旋转尾翼弹丸在直线段的飞行特性,通过建立的模型计算弹丸滚转角度,采用弦长比例和章动角幅值为系数进行补偿。数值仿真分析表明,所提出的改进方法在复攻角平面不同方向上的蒙特卡洛仿真计算,能够得到比较满意的误差结果,在给定条件下,误差基本在弹丸实际使用的允许范围内。更多还原

【Abstract】 The roll angle of trajectory correction projectile is an important parameter.The paper describes a procedure for quantifying and compensating for roll angle offsets of trajectory correction projectile associated with three-axis magnetometer.Based on the straight-line trajectory characteristic of the rotary fin projectile,compensating by the scale of chord line and nutation angle magnitude,the roll angle is estimated using third-axis data information that includes the extended nutation angle and dip angle information through the B2AC method.The analysis of the Monte-Carlo simulation results indicates that the projectile roll angle can be measured accurately with this method and the precision is higher under ideal condition,and errors are limited in allowable range.更多还原