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强激光连续干扰、照射空中靶材使其升温、软化、熔融而造成其结构的饱和或损伤,一定的能量积累是必需的.能量积累与激光器功率密度和激光束在靶材上的驻留时间有关,在一定激光功率水平下,驻留时间越长,干扰效果越佳.显然强激光地面伺服系统的跟踪精度和速度跟踪能力将直接影响激光在高空动靶上的驻留时间,从而影响干扰效果.而在高俯仰角下跟踪高空动靶,地面伺服系统的水平跟踪精度和速度分辨率又是影响驻留时间的重要因素.系统方位速度分辨率定义为水平伺服系统所能分辨的最低速度值Vmin.本文针对高空500km处的动态靶标,讨论了地面激光发射系统在出光口径 D=1m,衍射极限γ=3,光束直径为40m时的单次照射时间(即激光在靶标上的驻留时间),由此分析激光干扰高空动靶所需地面伺服系统的跟踪精度和速度跟踪分辨能力,由此得出地面伺服系统方位稳定跟踪速度越低,干扰效果愈好的结论.
Strong laser continuous interference, exposure to the air target temperature, softening, melting and causing the structure of saturation or damage, a certain amount of energy accumulation is necessary. Energy accumulation and laser power density and the laser beam on the target dwell time It is obvious that the tracking accuracy and speed tracking ability of the laser ground servo system will directly affect the laser dwell time on the high altitude moving target and thus affect the interference However, tracking high-altitude moving targets at high pitching angles, horizontal tracking accuracy and speed resolution of ground-based servo systems are also important factors affecting the dwell time.The system azimuth speed resolution is defined as the lowest speed that the horizontal servo system can distinguish Value of Vmin.In this paper, for a dynamic target at a height of 500km, this paper discusses the single irradiation time (ie, the laser resides on the target when the laser aperture is D = 1m, the diffraction limit γ = 3 and the beam diameter is 40m) Time) to analyze the tracking accuracy and speed tracking resolution capability of the ground-based servo system required by the laser interfering with the high-altitude moving target. Thus, the ground-based servo system The lower the tracking speed stability, the interference effect is better conclusions.