机载红外搜索跟踪系统有效探测区域研究

Research on effective detection area of airborne infrared search and tracking system

针对机载红外搜索跟踪(IRST)系统在实际空战中发现概率过低的问题,论文尝试将作用距离与发现概率相结合,提出了有效探测区域的概念,并分别建立了水平、俯仰两种探测方式下有效探测区域模型;接着讨论了在复杂作战环境下,所建立的模型随发现概率、作用距离、大气透过率、目标飞行速度的变化情况。仿真结果表明,探测区域范围是随着上四种因素的变化而实时变化的,并且在两机相距百公里以上,气象恶劣、目标低速飞行时,有效探测区域仅仅是目标尾后上方很小的一块区域。机载IRST系统可以依据论文给出的变化关系,在探测过程中,动态建立信号视场中检测阈值与复杂因素的函数关系,以提高发现概率。论文为充分发挥机载IRST系统的作战使用性能提供了理论参考。

Aiming at the low detection probability of airborne infrared search tracking systemof effective detection area is put forward and the models of effective detection area are bugle. Then, the changes of the model with detection probability,operating range,atmosphespeed are discussed. The simulation results show that the detection area changes with these four factors in real - time, and when the operating range exceeds one hundred kilometers, the weather is bad and flight speed is low, the effective detection area is only a small area above the end of the target. According to the change rule in the paper,the airborne infrared search and tracking system can improve the detection probability through establishing dynamically the function relationship between detection threshold and complex factors. This study provides a theoretical reference for the opera-tional performance of the airborne infrared search and tracking system.