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两个拦截器的红外导引头对目标飞行器进行同步观测,而后进行集中式多传感器信息融合。信息融合目标运动估计采用交互式多模型方法 IMM,使用常速度模型CV和自适应加速度模型ACA描述目标的运动,滤波器采用成熟的扩展卡尔曼滤波EKF。设计视线运动规律,拦截器按照此规律运动便可以期望的视线角命中目标。基于Lyapunov稳定性理论,得到了实现视线运动、使脱靶量和指令角度偏差收敛于0的加速度指令。最后数值仿真证明滤波系统与制导律配合工作可以完成对目标的拦截,脱靶量平均值小于0.2m,视线角度偏差小于1°。
The infrared seeker of two interceptors observes the target aircraft synchronously, then carries on the centralized multisensor information fusion. The information fusion target motion estimation uses the interactive multi-model method IMM, describes the target motion using the constant velocity model CV and the adaptive acceleration model ACA, and the filter uses the mature extended Kalman filter EKF. Design line of sight of the law of motion, interceptors in accordance with the law of motion can be expected to hit the target line of sight. Based on the Lyapunov stability theory, an acceleration command is obtained to realize the line-of-sight movement, and the miss distance and command angle deviation converge to zero. Finally, the numerical simulation proves that the filtering system can cooperate with the guidance law to accomplish the target interception. The average value of miss distance is less than 0.2m and the deviation of line of sight angle is less than 1 °.