Research On The Integrated Navigation Technology Of The Emitting Region Ground Radio Beacon/MIMU Of Ammunition

In recent years, one of the important directions for the development of ammunition technology is changing conventional ammunition to smart munitions with simple guided function to improve strike accuracy. Trajectory detection technology is one of the key technologies for the smart ammunition to realize precision strike, using GNSS / MIMU integrated navigation system to detect ballistic can realize complementary advantages to achieve better navigation performance. However, when the war broke out, considering the GNSS positioning system usability problems in wartime, developing ammunition navigation technology which does not depend on satellite has been the concern of countries. Therefore, it is necessary to research on other means of ammunition navigation which do not rely on satellite.This paper mainly studies the emitting region ground radio beacon/MIMU integrated navigation technology in the application of ammunition, analyzed the affect of radio beacon positioning system constellation layout to PDOP, optimized the constellation layout; researched on the MEMS-IMU error characteristics and strapdown solution method, according to MEMS-IMU navigation features we carried out sports ground test to verified the correctness of the algorithm, and statistical analysis of the changes in the size of the error. We established MEMS-IMU data generator models according to the navigation calculating process of the MEMS-IMU and projectile movement characteristics, generated simulation data which can be used for later study. Finally, on the basis of these studies, taking pseudorange and pseudorange rate tightly integrated model as the combination of terrestrial radio beacon/MIMU navigation system, using kalman filter algorithm fuses data which are simulated by ground radio beacon and MEMS-IMU. Simulation results show that the position error, velocity error and attitude error of projectile are greatly reduced compared to the system which is not integrated, lay a certain foundation for future engineering applications.