基于在线相位角辨识的改进落点预测修正算法

Improved Impact Point Predication Correction Algorithm Based on Online Phase Angle Identification

针对目前弹丸在实际飞行过程中,二维弹道修正引信修正指令离线补偿存在相位角偏移量估计误差问题,提出了基于在线相位角辨识的改进落点预测修正算法。采用导航位置信息估计当前时刻实时过载,根据当前时刻时间,对落点预测弹道存储的预测弹道过载信息进行插值,得到预测弹道此时弹丸过载信息,通过计算当前过载估计值与预测弹道理论解算值之间误差,结合实际测量得到的修正翼面滚转角信息,对修正指令补偿项相位角进行在线辨识。仿真结果表明:基于在线相位角辨识的改进落点预测修正算法能够根据弹丸实际飞行状态在线估计出修正指令相位角偏移量,与离线补偿算法相比,能够有效补偿弹丸飞行过程中由于射击、气象等条件扰动所带来的对修正指令相位角偏移量的影响,克服修正指令离线补偿存在相位角偏移量估计误差问题,弹丸对目标打击CEP提升至少25%。同时该算法实现简单,具有较好的工程可实现性。

Aiming at the current projectile,the two-dimensional trajectory correction fuze correction instruction offline compensation had the problem of phase angle offset estimation error in the actual flight process.An improved algorithm for the correction of the falling point prediction based on online phase angle identification was proposed.The navigation position information is used to estimate the real-time overload at the current time.According to the current time and time,the predicted ballistic overload information of the predicted ballistic storage of the landing point was interpolated,and the projectile overload information of the predicted ballistics is obtained,and the current overload estimation value and the predicted ballistic theory were calculated.The error between the values,combined with the corrected measured airfoil roll angle information,was used to identify the phase angle of the correction command compensation term.The simulation results showed that the improved placement prediction algorithm based on online phase angle identification could estimate the corrected command phase angle offset based on the actual flight state of the projectile.Compared with the offline compensation algorithm,it could effectively compensate for the shooting during the projectile flight.The influence of conditional disturbances such as meteorology on the phase angle offset of the modified command overcome the problem of estimation error of the phase angle offset in the off-line compensation of the correction command,and the projectile improved the target hit CEP by at least 25%.At the same time,the algorithm was simple to implement and had good engineering achievability.