3D X-ray analysis of sabot separation

For the investigation of transitional ballistics of sub-caliber projectiles, an innovative, X-ray based measurement technique was developed which opens up new possibilities of examination. The sabot separation after leaving the muzzle is of major importance for accuracy. Since, especially near the muzzle, the exhausting propellant gases hamper or obstruct the optical access, flash X-ray technology was chosen. Two orthogonal radiographs are taken at several different distances to the muzzle. Thanks to the use of feature-based registration methods, the spatial position and orientation of the individual parts can be determined. Since these data are only available at few discrete points in time or distances, respectively, the intermediate steps have to be calculated through model-based interpolation. To this end, methods from the fields of data fusion and data assimilation are employed. The new measurement method allows advanced evaluations and very detailed insights into the dynamic processes.