针对末制导中剩余飞行时间估计算法误差较大,致使制导精度偏低的问题,提出速度弹道轨迹法和弹目视线平均速度法以精确估计剩余飞行时间。速度弹道轨迹法是通过对速度通过的弹道轨迹进行分割积分计算来求解剩余飞行时间;弹目视线平均速度法是在弹目视线上实时计算平均速度的方法来求解剩余飞行时间。将其应用于多约束条件下的飞行器最优末制导律中,仿真结果表明新算法具有很高的估计精度。

In view of the problem that many errors of residual flight time estimation algorithm in terminal-guidance resulting in low guidance precision, the ballistic trajectory method and the missile-target sight average speed method were proposed to estimate residual flight time accurately. Speed ballistic trajectory method is to calculate the residual flight time through the ballistic trajectory segmentation integral. Missile-target sight average speed method is to calculate average speed on the missile-target sight on line to solve the residual flight time. The simulation results show that the new algorithm has high estimation precision by applying it to the optimal aircraft terminal-guidance law under constraint conditions.