Research On Laser Fuze Echo Signal Simulation Technology

Laser fuze has been widely used in a variety of missile weapon systems because of its high precision of blast point control.Digital simulation technology has played an increasingly important role in the research and development process of laser fuze.The performance of laser fuze is affected by the system design,working environment and signal processing method.Therefore,it is necessary to study the laser fuze echo signal simulation technology,so as to further improve the performance of laser fuze.In this paper,the pulse-based panoramic laser fuze was taken as the research subject,and the target modeling technology for laser fuze echo signal calculation,the echo signal simulation technology,the echo signal processing technology and the adaptive burst delay simulation technology were studied aiming at a typical target.The main work of this paper is as follows:The method of modeling the geometric and surface materials of the target geometry is studied.The principle of constructing the target geometric model based on faceting method was analyzed.The data of 3DS format target model was analyzed,read,and repackaged,the target surface material parameters were introduced and the visualization of the target model data was realized.Based on the study of the Bidirectional Reflectance Distribution Function(BRDF)and the Time-Varying Weight Particle Swarm Optimization algorithm(TVWPSO),software for the optimization and statistical modeling of BRDF calculation model with five parameters for the typical target was developed.The correctness of the optimization model was verified by comparing the calculated values of the optimization model with the measured data that had not participated in the optimization,and the BRDF value of a typical target facet at any angle of incidence and exit could be calculated with the optimization model.Based on the established target model,the fuze model,the BRDF calculation model and the relationship model between the laser radar cross section(LRCS)and the BRDF,the echo power and the LRCS,the target LRCS and the echo power calculation software was developed,which could do the simulation of echo signal of typical targets under various intersection conditions.The simulation of the typical intersection of head-on,tail-chase and side-by-side were carried out.By analyzing the difference between the cloud interference and the target echo signal,the laser fuze echo signal processing and target recognition algorithm based on the dynamic threshold were designed.The simulation of the signal processing algorithm based on software had been done,and the target recognition algorithm was verified based on the DSP hardware platform.The visual simulation software to calculate the burst delay was developed.And based on the software,the relative velocity of missile and target-burst delay statistic experiment was carried out.The adaptive burst delay model was established.The parameters of the delay model were optimized by TVWPSO algorithm,Genetic Simulated Annealing algorithm(GSA)and Ant Colony Algorithm(ACA),and the performance of the algorithm was compared and analyzed.