Based On Geomagnetic Measurements Of The Projectile Roll Angle In Real Time Solver

The attitude measurement technology of trajectory correction projectiles is the important direction of the modern ammunition development. It can provide azimuth referrence for automatic navigation system and correction device in trajectory correction projectile, directly improve the hit rate.Rotation angle's precision of measurement and real-time problems directly impact on the accuracy and response speed of trajectory correction. Developing real-time calculation module of rotation attitude which has high precision, low cost, fast calculation speed, anti-jamming capability is the main task.A prototype of real-time rotation attitude calculation is developed using geomagnetism detection technology and rotation attitude calculation theory. Arithmetic optimized according to the characteristic of hardware and software and the practicality requirement. The prototype using DSP for processor and using RTOS for software kernel. It has reliability and real-time capability.The method of rotation attitude real-time calculation is validate feasible by dynamic, in-system, real-time calculation prototype experiment. The prototype's real-time rotation angle error is less than 5 degrees in dynamic experiment. It can provide real-time and accurate azimuth referrence for trajectory correction projectiles.