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通过分析研究建立了前视红外探测阵列 (FL IR)对导弹进行精确跟踪、定位的数学模型 ,其中包括导弹的运动模型、大气干扰模型和探测阵列的观测模型。根据探测阵列的原始观测数据 ,利用扩展卡尔曼滤波器 (EKF)精确跟踪导弹目标。由于导弹与探测器的距离较远 ,故可视为点目标。导弹在探测阵列上投影的位置由两部分组成 :导弹真实运动位置和由于大气干扰造成的偏移。滤波器分别估计了这两种位移在探测阵列上的变化。最后用蒙特卡罗方法分析了滤波器的性能。
Through the analysis and research, the forward IR detection array (FL IR) is established to accurately track and locate the missile’s mathematical model, including the missile’s motion model, the atmospheric interference model and the observation array’s observation model. According to the original observation data of the detection array, the target of the missile is accurately tracked with an extended Kalman filter (EKF). Due to the distance between the missile and the detector, it can be regarded as a point target. The projected position of the missile on the detection array consists of two parts: the actual position of the missile and the offset due to atmospheric interference. The filters estimate the changes of these two displacements on the probe array respectively. Finally, the performance of the filter is analyzed by Monte Carlo method.