光学学报, 2017, 37 (3): 0304001, 网络出版: 2017-03-08
机载红外搜索跟踪系统的最佳阈噪比
Optimum Threshold Noise Ratio of Airborne Infrared Search and Track System
探测器 阈噪比 作用距离 发现概率 虚警概率 探测概率包线 detectors threshold noise ratio operating range recognition probability false alarm probability detection probability envelope
摘要
为了探求机载红外搜索跟踪(IRST)系统的最佳阈噪比(TNR), 采用基于信噪比(SNR)的作用距离模型, 并结合虚警概率、发现概率和SNR之间的函数关系, 构建了机载IRST系统的探测点目标概率模型, 重点分析了发现概率与作用距离、目标速度和倾斜角度之间的关系。结合飞机的红外辐射特性, 建立了机载IRST系统的探测概率数学模型, 仿真分析了在不同TNR下, 方位角和俯仰角的变化对作用距离的影响。根据作战需求, 提出最佳TNR在8~10范围内。该研究结果为提高机载IRST系统在实际使用中的探测效率提供了参考依据。
Abstract
In order to find the optimum threshold noise ratio (TNR) of the airborne infrared search and track (IRST) system, the operating range model based on the signal to noise ratio (SNR) is adopted to combine with the function relationships of false alarm probability, recognition probability together with SNR and thus the probability model of detection point target of the airborne IRST system is established. The relationship between the recognition probability and the operating range, the target speed and the oblique angle is mainly analyzed. Combining with the infrared radiation characteristics of aircraft, the mathematical detection probability model of airborne IRST system is established. The influence of the change of target azimuth and pitching angle on the operating range is simulated and analyzed under different TNRs. According to operational requirements, it is concluded that the range of the optimum TNR is from 8 to 10. The results provide references for increasing the detection efficiency of airborne IRST system in practical applications.
寇人可, 王海晏, 吴学铭. 机载红外搜索跟踪系统的最佳阈噪比[J]. 光学学报, 2017, 37(3): 0304001. Kou Renke, Wang Haiyan, Wu Xueming. Optimum Threshold Noise Ratio of Airborne Infrared Search and Track System[J]. Acta Optica Sinica, 2017, 37(3): 0304001.