机载预警雷达牵引模式的IRST探测效能分析

摘要

机载预警雷达牵引红外搜索跟踪系统(IRST)探测是同平台多传感器协同的一种重要工作模式。为定量评估该模式对IRST探测效能的影响,以IRST探测概率作为评估指标,建立多个瞬时视场下的成功牵引概率数学模型,计算在不同雷达工作模式下满足一定成功牵引概率的IRST搜索视场范围,推导IRST的探测概率与作用距离、脉冲积累之间的关系式。仿真结果表明,在保证成功牵引概率为0.99的前提下,雷达在高精度测量模式下的牵引效果最佳,使 IRST的搜索区域缩小为原来的1/180,时间节约效率为99.4%,加快了对目标的截获过程。节余的时间可用来对目标进行脉冲积累,当积累2个脉冲时,在其最大作用距离处所对应的探测概率由无积累时的0.5提升到0.9853,从而显著提升其探测效能。%Airborne early warning radar towing infrared search and tracking system for detection is a kind of important working mode of multi�sensors coordination on the same platform.In order to try to find out a-bout the quantitatively evaluative patterns influence on the IRST's detective efficiency,taking the detecting probability of the IRST as an evaluation criteria,this paper establishes a mathematic model of the success-ful towing probability under condition of multi�instantaneous field of views,calculates the view zones searched to meet the needs of a certain successful towing probability under condition of the different radar working modes,and then derives the relationship formulas among the detection probabilities,the operat-ing distances,and the pulse accumulations.Under the premise of ensuring that the successful towing prob-ability is 0.99,the radar in high precision measurement mode can acquire the best towing effect to make the search area of IRST reduce to 1/180 of the original,the time saving efficiency is 99.4%,and the process of target capture accelerates.The saved time can use to accumulate pulses,the detective probabili-ty corresponding to the maximum action distance increases from 0.5 to 0.985 3 when the accumulated num-ber of pulses reaches two pulses,thus significantly improving the detective efficiency of IRST.