| The infrared imaging guided missile has become one of the main threats in modern warfare.In the way of confrontation,the use of laser jamming as a defensive means has the advantages of high efficiency,cost-effectiveness and high accuracy,which attracted more and more attention from researchers.Compared with the method of outfield test,using mathematical simulation method to study the interference effect of laser on infrared imaging guided missile can effectively reduce the cost of test,shorten the development cycle,so it has important theoretical and practical significance to pursue this research.In this paper,infrared imaging air-to-ground missile was taken as the research object,and the influence of infrared imaging air-to-ground missile irradiated by laser was analyzed.Firstly,the calculation of missile guidance and control signals was discussed,and the missile three-dimensional motion model was established.Based on this model,the influence of random error factors on missile motion was considered to calculate the impact points of missile on target plane using Monte Carlo simulation,and the circular error probable and hit probability of missile are obtained.Secondly,the law of variation of laser energy and spot radius in atmospheric and optical systems was introduced.Combining with the principle of "optical saturation crosstalk",the simulation model of infrared imaging seeker irradiated by laser was established and verified by experiments.Finally,the imaging process of target on infrared imaging seeker was deduced,and the simulation model of infrared imaging air-to-surface missile’s attack process was established using centroid tracking.The trajectory of missile after laser interference in flight was calculated.By comparing the change of hit probability before and after interference,the effect of laser interference was evaluated. |
