Modeling And Simulation Of Infrared Imaging Guidance Seeker With Laser Jamming Effects

In modern warfare,informatized and intelligent strategic weapons play a pivotal role on the battlefield,and they have received increasing attention from all countries.As a typical information-based precision guidance weapon,infrared imaging seeker has been widely used in precision strike missions of key military targets,and it will also play an increasingly important role in the future information-based battlefield.With the continuous development of infrared seeker guidance technology,the laser jamming technology against it has emerged correspondingly,which can effectively cause serious interference to the seeker’s imaging equipment and reduce the seeker’s guidance capability.Therefore,a visual dynamic simulation platform is established for the offensive and defensive confrontation process of laser jamming infrared seeker imaging guidance for the target,and the imaging characteristics of laser jamming infrared seeker are presented under the viewport of the seeker,and the guidance control principle is combined under interference conditions.Establishing a simulation of the process of pursuing a target can not only reduce the cost and time period of the experiment,but also provide a theoretical basis for the study of laser jamming weapons and missile anti-jamming capabilities,which has important research significance.The main research contents of this paper are as follows:1.The mechanism of laser jamming infrared seeker imaging guidance has been studied.Firstly,the basic structure and working principle of the fourth-generation infrared imaging guidance seeker and the characteristics of laser interference sources have been introduced.Secondly,combined with experimental phenomena,the mechanism of laser interference with infrared seeker has been analyzed,which mainly includes the interference of laser on infrared seeker imaging,and the influence of laser interference on the guidance performance of the seeker.2.The modeling and simulation of laser interference infrared seeker imaging characteristics have been completed.Firstly,according to the laser interfering with the infrared seeker imaging system’s radiation energy transfer link,the laser’s atmospheric transmission effect model was established.Secondly,the optical simulation software Trace Pro is used to design the optical system of the infrared seeker,which simulates the laser imaging spot and stray light radiation distribution on the image surface of the infrared detector of the seeker.Finally,the threshold saturation effect model of the imaging device of laser jamming infrared seeker is established,and the crosstalk effect of laser interference infrared seeker imaging is simulated,and the laser jamming effects under different incident conditions is realized based on the simulation software of infrared seeker imaging digital prototype.3.The modeling and simulation of the laser jamming infrared seeker countermeasure process have been completed.Firstly,the simulation of the missile target recognition module is realized based on the Open CV integrated gray-scale centroid algorithm.Secondly,use Simulink to establish the relative kinematics equations of the target and the missile,study the trajectory of the missile chasing the target under the proportional guidance guidance law,and realize the infrared seeker under the viewport of the infrared seeker in the simulation software of the infrared seeker imaging digital prototype.Finally,complete the simulation of the complete closed-loop dynamic offensive and defensive process of the missile attacking the target under the viewport of the seeker,and the target emits laser to interfere with the guidance of the missile.According to the results of multiple simulation tests,the imaging guidance performance of the laser interference infrared seeker under different incident angles and output power conditions is analyzed from the tracking success rate,miss distance,and the distance between missile and target at the time when the target is lost.