基于弹道预测与倾角校正的末制导炮弹导引方法

Guidance Law for Guided Projectiles Using Trajectory Prediction and Flight Path Angle Correction

为了提高炮弹的精确打击能力,以某制导炮弹为研究对象,对适配的快速弹道预测方法和末段导引方法进行了研究。通过对三自由度质点弹道方程进行解析求解,建立了一个精度良好、运算速度较快的弹道预测解析模型,提出了相应的剩余飞行时间计算模型;根据预测落点与目标点之间的位置偏差,提出了一种基于弹道倾角校正的末段导引方法,并进行了数值仿真。仿真结果表明,该导引方法在不同弹道条件下均具有较好的应用效果,可有效提高制导炮弹的精度。

To improve the hit precision of guided projectiles,the suitable application process of rapid trajectory prediction law and terminal guidance law were discussed. Through the analytical solution of the 3D point mass trajectory equations,an analytical model with good accuracy and the corresponding algo-rithm for less time-consuming time-to-go estimation was also proposed. According to the position errors be-tween the predicted impact point and the target,a terminal guidance law was proposed based on the correc-tion rate of flight path angle,and then the numerical simulation was conducted. The simulation results in-dicate that under different trajectory conditions,the guidance law is satisfactorily effective and less time-consuming to improve the hit precision.