Research And Realization Of Signal Processing For Velocity Measurement Of Intermediate Ballistic Projectile

Under the conditions of modern warfare,people are increasingly demanding on the performance of weapons launch systems.The velocity parameter of projectile is an important indicator to evaluate the characteristics of weapon,ballistic and ammunition,and the measurement of projectile velocity parameter plays an important role in the research of weapon launch system.At present,the research on intermediate ballistic is not sufficient.Therefore,the measurement of the projectile velocity parameters of the intermediate ballistic is of great significance for the development of weapon system and the development of ballistic theory.In this paper,a pseudo-Wigner-Ville distribution algorithm optimized by thresholding method is proposed for time-frequency analysis of projectile intermediate ballistic echo signals,and the Doppler frequency of projectile is obtained by instantaneous frequency estimation.The front-end fitting solution is used to solve the problem of the frequency hopping after the pseudo-Wigner-Ville distribution algorithm analyzes the signal.At the same time,C#is used to build the system software platform.It provides parameters input for the signal acquisition and processing module,completes signal acquisition and signal time-frequency analysis,draws V-T curve of projectile and realizes human-computer interaction.In terms of system hardware,the PXI-3950 data processing board is equipped,and with PXI-9826 data acquisition board to build a hardware platform of the velocity-measuring radar system.Then based on this,it completes the design of other circuit modules,including power module,signal filtering and amplifying module,and infrared triggering receiver module.Finally,the signals generated by the analog signal generator and the ballistic projectile echo signals actually collected are tested and analyzed respectively,so as to verify the accuracy and reliability of the system.