The Research On The Process Of The Air-air Missile Launched By Armed Helicopter Under Atrocious Environments

The armed helicopter plays a remarkable role in modern war day by day. It is the most important weapon to capture and control the air supremacy of low latitude or extreme low-altitude and it has superiority that other aviation aircraft cannot be substituted. But the fight environment at the low latitude is very complicated and that puts forward the severe test to the transmissions of helicopter airborne weapons. So the research of this subject becomes the task of top priority. Studying the helicopter air battle system, especially launching the air-air missile carried on the air attack under abominable environments, so seems more and more important, more and more urgent.In this paper, the research is on the air-air missile attack system launched by armed helicopter under abominable environments which is based on the fixed-wing fighter and consider properties of helicopter itself, and the focus of that is on the model of helicopter, rotor waves, air-air missile and integrated fire/flight. This paper is structured as follows:Firstly, a group of six free-degree linear motion equations in combination with micro disturbance and couple are established. Considering the natural helicopter coupling deeply and less stability, a neural networks adaptive controller is designed and applied to helicopter's flight control system, which contains some advantages of neural networks and adaptive control.Secondly, The environment, under that the helicopter flies and airborne weapon is launched, is analyzed. Probe into helicopter wing wave produce wash and flow field tentatively. The down wash flow has been mainly studied in its forming and its model, and also the its distribute is given under terms with helicopter hang and park or low-speed flying, for offering the basis of next research on the down wash flow's influence of the guided missile launching.Thirdly, the air-air missile's model is studied, and set up guided missile motion equations that passes through the area of the down wash. Using the preceding down wash distributing data, the fly situation and orbit changes in initial stages of the guided missile launch have been studied. Emulation results show that guided missile's fly situation and its initial trajectory have influence by the down wash.Lastly, according to the analyses of the model, the air-air missile integrated fire/flight control system is studied, and "fire/flight" coupler is established. For the integrated simulation, the helicopter's attack mode, air-air missile's guide law and the whole launching process are studied and simulated. Emulation results show that the supposed attack system can rapidly trace the motion target to satisfy the launching condition, attack the target successfully and display the launch process under the wing down wash. It offers better emulation foundation for improving the percentage of hits and fight accurately.