Pulse Doppler Fuze Body Target Echo Simulation And Signal Processing

In this paper,based on the lead-war technology,based on the analysis of the target characteristics and the time-frequency domain of the echo signal during the process of projectile intersection,a method of dynamic echo prediction of polyhedron target is proposed.Afterwards,the simulated echo signal is processed by signal to complete the extraction of the target velocity distance information and achieve the precise positioning of the target on the fuze.Finally,according to the positioning information,the optimal initiation control method of fuze is analyzed.The main work of the dissertation is as follows:1)Proposed a method of body target dynamic surface element echo simulation based on the proportionally guided tracking model.The 3D modeling of the PAC-3 missile is conducted by using the face-area method,which is divided into the combination of the face-element and the split.Through the back to determine the surface,the beam of judgment,the target occlusion judgment of the target to determine the effective face.2)By means of the physical optics(PO)method,the scattering of surface elements in the bulk target was analyzed,and the diffraction of the splitting in the bulk target was analyzed by the equivalent electromagnetic flow(MEC)method.Finally,an improved MEC expression was used to express the classical MEC The problem of generating singular points is optimized,which makes the calculation result more practical.After all the scattering field vectors are summed to obtain the total scattering field,the target RCS.3)The basic principle of pulse Doppler fuze is studied,and the echo of the video signal and the distance gate signal is simulated separately for the point target and PAC-3 missile model based on the proportion-guided tracking model.By the algorithm,The speed information extraction.4)The optimal initiation control of lead warfare is studied.By analyzing the trajectory of the projectile intersection,the optimal initiation delay is calculated and the optimal initiation control method is obtained.