焦平面图像制导导弹对地面目标截获概率计算

For the needs of target detection and precision guidance of image guided missile,the ground target intercept probability of image guided missile when it is transferred to terminal guidance based on a rectangular focal plane detector is investigated. The analytical solution of irregular quadrilateral detection field(IQDF) and the simplified rectangular detection field (SRDF) model for ground detection are derived from the altitude,attitude and detector parameters of missile. The main error sources affecting the target intercept probability are identified. The target intercept probability is decomposed into the missile state probability andthe probability of a target falling into the ground field-of-view in the current state by using the conditional probability idea,and the finite element segmentation algorithm is utilized to derive the probability of the target falling into the ground field of view(FOV),so as to establish a model of target intercept probability in the case of multi-source error. The effects of the main error sources on the probability of the target falling into the ground FOV in IQDF and SRDF are analyzed by simulation,and the derived target intercept probability is compared with the Monte Carlo simulation results in the case of multi-source errors,which verifies the effectiveness of the target intercept probability calculation method.