| In military operations,air combat capabilities have always been an important way of embodying military power.With the rapid development of infrared technology,infrared guided missiles have become the mainstream combat weapons in war.Infrared decoy missiles have obvious interference effects and remarkable combat performance in infrared combat confrontation,which makes infrared guided weapons unable to achieve accurate positioning of targets.With the damage attack,the military equipment has become the first choice for jamming weapons,so the radiation characteristics and movement characteristics of aircraft and decoy bombs have extremely important significance for the identification of decoy bombs.Based on this background,this article has conducted in-depth research on the positioning of infrared maneuvering targets,the motion characteristics of airborne infrared decoy and the infrared characteristics of infrared decoy.The specific contents are as follows:Firstly,the trajectory simulation of infrared decoy projectile in the projection process was analyzed in terms of movement characteristics.Firstly,the model of decoy projectile was established.Then,the trajectory equation of the decoy projectile was finally obtained by analyzing the resistance and gravity and the loss of the bait projectile Combined with the trajectory equation,the projectile trajectories in different situations were simulated.Secondly,combined with the flight status of the aircraft,the STK platform was used to generate the observation scene of the double star.Based on this,the three-parameter positioning method of the target was achieved in accordance with the corresponding data given by STK,and simulation experiments were carried out.The accuracy less then 500m.Finally,the radiation characteristics of infrared decoy bombs,carrier skins and tail flames are studied and compared.In terms of the radiation characteristics of the decoy bomb,the infrared radiation characteristic simulation of the decoy bomb was obtained by calculating and simulating the infrared bait bomb’s infrared characteristics by combining the infrared bait bomb’s geometric model and the decoy’s motion characteristics analysis with the main components of the decoy bomb..For the carrier aircraft,it mainly includes two parts,namely the radiation characteristic simulation of the carrier skin and the radiation characteristic simulation of the carrier tail flame.This article takes F22 aircraft as an example,uses SolidWorks to establish a simplified geometric model of the aircraft skin,and uses Workbench Meshing to mesh the model and import it into Fluent to simulate the temperature characteristics of the skin and the aircraft tail flame,and then the radiation characteristics of the skin The radiation force diagram of the skin is obtained by calculation.Secondly,the spectral radiation characteristics of the tail flame are obtained through theoretical calculation of the binary nozzle tail flame.By comparison,it is found that the aircraft skin has obvious infrared characteristics at 10～13μm,the infrared radiation intensity of the tail flame is mainly concentrated near 3.5 μm and 4.3 μm and the radiation of MTV decoy bombs is mainly concentrated in the short-wave and middle-wave bands of 1～3 μm,3～5 μm,there is no obvious radiation characteristics in the 8～12 μm long wave band.Finally,Modtran was used to design simulation experiments for the atmospheric transmittance at the flying height of the carrier and the flying environment.The experimental results show that the infrared long wave detector is actually used.It has a better application value for the identification of decoy bombs,and combined with the calculation using Unity3D to do the real-world simulation and infrared image simulation under 8～12μm for the projection process of the decoy bombs.Finally,based on the simulated images,the Canny edge The detection operator performs image recognition on the stealth aircraft under the single interference of infrared bait. |
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