借助于三维实时视景仿真软件Vega的红外模块研究了自建模型的红外效应。介绍了红外仿真原理，给出了详细的红外仿真流程，并详细分析了仿真结果。根据项目对仿真精度的要求，提出了优化仿真过程的方法。结合Vega的底层映射机理提出更为精确的长波波段下的辐射量灰度映射关系，同时通过TMM的纹理材质映射关系改进，得到更为符合实际的材质反射率计算公式，并为仿真系统重建了传感器模型，使得仿真模型的辐射量偏差缩小为1.145%~3.358%。此外，初步探讨了仿真系统的校核、验证和确认技术(VV&A)，并对仿真过程做了全生命周期的可信性评估，为进一步研究仿真系统的可信性评估提供了参考。

Infrared effects of created models in this paper are studied via sensor vision and sensor works modules in real-time 3-D emulational software named Vega. The principle of infrared simulation flow is introduced and the simulation results are presented, and then the infrared simulation flow is given. To improve the precision of simulation, some methods are given. In combination with the mapping mechanism of the Vega, a more precise radiation-grey mapping under a far infrared wavelength is presented, meanwhile, a more factual formula of reflectance calculation for materials is obtained by improving the mapping in TMM. Using the established sensor model, the radiation warp is reduced to 1.145%~3.358%. Furthermore, the Verification, Validation and Accreditation(VV&A) of the simulation system are discussed, and the creditability of whole simulation process is evaluated, which provides some references for further researches of the simulation systems.