视线方向飞机红外辐射特性建模与仿真

Modeling and simulation of airplane infrared characteristic along the sightline

建立一种高效准确实时性好的视线方向飞机红外辐射计算模型一直是红外对抗仿真中的瓶颈问题。为解决这类问题,从分析飞机主要辐射源特性出发,结合红外辐射的经典理论和射流动力学理论,提出了一种准确快速的计算方法。首先,将整机的红外辐射分解为蒙皮辐射和排气系统辐射两大主要部分;其次对于红外辐射计算中较困难的排气系统红外辐射,基于SLG模型和视线追踪的思想,推导了相应的离散化方程,建立了相应的计算模型;最后进行了仿真分析,并与实测数据进行了比较。仿真结果表明,该方法计算准确,对于红外对抗仿真具有重要的参考应用价值。

How to build up an efficient accurate and quick airplane＇ s infrared radiation model along the sightline is always a bottleneck problem in the IRCM simulation. In order to solve this problem, based on the radiation character- istic of airplane main infrared radiation source, the classical radiation theory and jet dynamics theory, a quick and ac- curate computation method is put forward. Firstly, the airplane radiation is divided into two main parts, skin radiation and exhaust system radiation. Then, for the complex calculation of exhaust system radiation, based on the SLG mod- el, the corresponding discrete equation is derived, and a calculation model is built up. At last, simulation and analy- sis is made and the results compared with the measured data in the reference. The simulation results show this method is accurate, and has important application value in the IRCM simulation.