Airplane infrared radiation and atmospheric transmittance modeling method

Abstract

The invention discloses an airplane infrared radiation and atmospheric transmittance modeling method, belonging to the field of airplane infrared radiation modeling and simulation in computer simulation. The modeling method comprises the following steps of: firstly acquiring an airplane infrared radiation intensity interface, establishing an airplane surface skin temperature model by integrating surrounding environmental radiation, and calculating airplane surface skin infrared radiation intensity according to an area model; and then establishing an engine effuser infrared radiation intensity model; and finally establishing an plume input parameter model and plume temperature model and calculating plume infrared radiation intensity. After acquiring an airplane zero-distance infrared radiation intensity model, the invention adopts software Modtran4 to establish a transmission radiation model of infrared radiation in an atmospheric environment to acquire atmospheric transmittance and further obtain an infrared radiation intensity signal reaching an sensor terminal. In the modeling method, the models are simple, and experiment data accords with real conditions. The modeling method can be applied to platform infrared scene generation and infrared target detection platforms easily.

Description

technical field [0001] The invention relates to an aircraft infrared radiation and atmospheric transmittance modeling method, which belongs to the field of aircraft infrared radiation modeling and simulation in computer simulation. Background technique [0002] Establishing an infrared simulation model of an air plane in a military simulation system is of great significance to the research of a platform detection system and an infrared imaging simulation system. At present, many scholars have done research in this area and achieved certain research results. However, how to influence the working process of the engine according to the flight status such as the altitude and speed of the aircraft and the flight status has not been considered yet. Some scholars also use CFD for numerical simulation to calculate the infrared characteristic temperature of the aircraft. However, this method is suitable for infrared stealth and structural design analysis, and it is difficult to apply...

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Problems solved by technology

At present, many scholars have done research in this area and achieved certain research results. However, how to influence the working process of the engine according to the flight status such as the altitude and speed of the aircraft and the flight status has not been considered.

Some scholars also use CFD for numerical simulation to calculate the infrared characteristic temperature of the aircraft. However, this method is suitable for infrared stealth and structural design analysis, and it is difficult to apply it in real-time infrared simulation.

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