CAJ | 학술논문

榴弹二维弹道修正引信要求选用精度高、计算量小的落点预测算法，弹道积分外推和多项式拟合均不满足该要求。针对该问题，提出了基于摄动理论的落点偏差预测算法，通过射前装定基准弹道和偏导数实现榴弹落点偏差的准确预测。基于摄动落点偏差预测的数学原理，采用数值解法研究了计算步长、偏导数阶数、基准弹道和偏导数行数的选取原则，并用二阶渐消记忆滤波的方法减小了 GPS测试误差对预测精度的影响，采用仿真的手段对预测精度和在弹道修正榴弹上使用的有效性进行了分析。仿真结果表明，摄动落点偏差预测在基准弹道的邻域内有较高的预测精度。
류탄이유탄도수정인신요구선용정도고、계산량소적낙점예측산법，탄도적분외추화다항식의합균불만족해요구。침대해문제，제출료기우섭동이론적낙점편차예측산법，통과사전장정기준탄도화편도수실현류탄낙점편차적준학예측。기우섭동낙점편차예측적수학원리，채용수치해법연구료계산보장、편도수계수、기준탄도화편도수행수적선취원칙，병용이계점소기억려파적방법감소료 GPS측시오차대예측정도적영향，채용방진적수단대예측정도화재탄도수정류탄상사용적유효성진행료분석。방진결과표명，섭동낙점편차예측재기준탄도적린역내유교고적예측정도。
The 2D trajectory-correction fuze of grenade needs the algorithm of impact-point prediction with high precison and less calculation,but the integral extrapolation of traj ectory and polynomial regression can’t meet the requirements.Aiming at this problem,the prediction algorithm of impact-point deviation was proposed based on perturbation theory.The impact-point was accurately predicted by setting the basic traj ectory and partial derivatives.Based on the math-ematical theory of predicting the impact-point,the principle of selecting computation step,the degree of partial derivatives,the basic traj ectory and linage of partial derivatives was studied,and the effect of GPS testing error on prediction accuracy was eliminated by fading memory filter.The simulation was carried out to verify the prediction accuracy and effectiveness.The simulation result shows that the algorithm of predicting impact-point has high prediction precision in the neighbourhood of basic traj ectory,and it can be applied in the traj ectory correction of grenade.