针对红外制导导弹无法直接测量弹目距离、视线角速度及目标加速度等制导信息, 且单枚导弹的可观测量少, 目标定位误差大的问题, 考虑红外导引头的测量特性, 利用多枚导弹与目标的几何关系对目标进行协同定位。建立多枚导弹对目标的协同跟踪模型, 通过计算导弹间相对运动关系估算弹目距离, 并将其作为伪量测量, 结合导引头测角信息构建新的量测方程, 利用卡尔曼滤波估计出弹目距离和视线角速度等制导信息。针对机动目标, 研究了一种基于交互式多模型滤波方法, 利用多个目标机动模型加权融合的方法来估计真实目标机动模型。数学仿真表明该方法有效提高了对固定/机动目标的估计精度。

Aiming at the problem that infrared guided missile cannot measure guidance information such as the relative distance, line of sight(LOS) rate and target acceleration directly, the observability of a single missile was less, and the target location error was large, considering the measurement characteristics of infrared seeker, geometrical relationship among multiple missiles and the target was used to locate the target cooperatively. Multiple missiles cooperative tracking the target model was established. The distance between missiles and the target was estimated by calculating the relative motion between missiles, and it was used as pseudo quantity measurement. The new measurement equation was constructed combined with the angle measurement information of seeker. The relative distance and LOS rate was estimated by Kalman filtering algorithm. Aiming at the maneuvering target, an interactive multiple model filtering cooperative tracking method was studied. The maneuvering model of real target was estimated by weighted fusion of multiple target maneuvering models. Simulation results show that the proposed method can effectively improve the estimation accuracy of the stationary/maneuvering target.