带有攻击角度和攻击时间控制的三维制导

Three-dimensional Guidance Law with Impact Angle and Impact Time Constraints

在三维空间导引动力学与运动学模型的基础上,假设目标静止,而导弹本身以恒速运动,根据实际的攻击角度与设定的攻击角度误差,分析和设计了期望的视线(LOS)角运动学,基于李雅普诺夫稳定性理论设计了带有攻击角度控制的三维导弹导引律。为了对攻击时间进行预测与控制,假设导弹本身以恒速或者匀加/减速运动,先将导弹导引到预定的攻击角度上,根据待飞直线距离对待飞时间进行估算,再根据预测时间误差,确定导弹按照特定的圆弧轨迹机动飞行的指令和机动飞行的时间,通过机动飞行来对时间误差进行补偿,最后,再利用所设计的导引律攻击目标。给出了仿真结果。

Under most circumstances,it is most important to achieve fast and real-time fault detection.Regarding faults as dynamic modes which are observed through the multi-sensors,with probabilistic data association based on multi-sensor,the fault detection results are obtained according to the association probability and threshold values.Joint probabilistic data association（JPDA） algorithm is one of the effective ways for multi-sensor multi-target tracking,and the JPDA algorithm is here improved： first,an approximation method is proposed for constructing the confirmation matrix through removing the small probability events using the right threshold values;and then,the mathematical division of the confirmation matrix is presented according to the intersection area of the association gate of fault targets to be tracked;lastly,the association probability of fault target is computed through attenuating the value of the public measurement.The simulation results show preliminarily that the improved JPDA algorithm saves the computing time greatly,and effectively meets the requirements of fast and real-time fault detection.