Study On Moving Target Simulation And Surface Plasmon Excitation

With the development of plasma science and technology,plasma technology has been applied not only in traditional industries,life science and agriculture,but also in national defense and military.It can be said that the development of plasma technology has promoted the modernization and technological advancement of the military.Plasma technology has much applications on it,such as plasma stealth,plasma mirror radar,plasma decoy,plasma thruster and so on.The study of ionospheric properties shows that the plasma absorbs and reflects electromagnetic waves.Plasma stealth technology has a lot of advantages in the shape of materials stealth technology and can be used with materials stealth together.The plasma technology can improve the active control of the aircraft.According to the recent research progress,a certain angle of attack for some airfoils can even increase the lift coefficient by more than 30%.The automatic tracking system can get the parameters such as the aerodynamic shape features of the rocket and the weapon model in the air,the flight attitude in real time,and returr the signal to the ground control center in time.The tracking accuracy determines the strike accuracy of the weapon directly.When the automatic tracking system is detected to track the spatial parameters such as the direction,speed and acceleration of the target,as well as the image tracking capability such as the flight attitude and aerodynamic shape,it will cost a relatively large amount of resources to test the real target.Based on this,we designed and developed the target simulation system based on the double oscillator mirror.This system is consisted of main control computer,fiber coupled semiconductor laser,high precision double vibrator scanning system,beam expanding and focusing optical system,semiconductor pyroelectric laser power meter,optical platform and adjustment system and scene large screen optical projection screen.It’s high integration,perfect functions and friendly human-computer interaction interface with control software.Using this system,we can achieve precise control of serial command response,remote device trigger control,target size control,energy control and target 2-D motion parameter traj ectory.Nanomaterials technology is the hottest technology frontier in recent decades.With the development of nano-technology,the research and development,characterization and unique electromagnetic characteristics of nano-structured materials whose sample size and shape can be regulated are highly concerned by various fields.In all kinds of metal nanoparticles or interstitial structures,local isotropy excitations,which have a great relationship with the size and shape of nanomaterials,play a major role.Different from the normal propagation of iso-excitons parallel to the interface direction,the dispersion relation of iso-excitons derived on the local surface of any surface is closely related to the structure.Because of this local geometry of the surface,the electromagnetic field near the special structure is greatly enhanced,resulting in very strange physics.Based on the traditional discrete dipole approximation method,the energy loss spectrum of plasma excited by electron beam is developed.When the aircraft re-enters the atmosphere with a high supersonic speed,it will be rubbed fiercely with the atmosphere.The aircraft is surrounded by a plasma sheath.The surface material of the aircraft will be ablated,and the plasma will seriously interfere the signal of electromagnetic wave.The communication between the air(ift and the ground even may be interrupted.Therefore,the simulation of plasma sheath flow field is very important.