The article establishes a seven-degree-of-freedom projectile trajectory model for a new type of spinning projectile. Based on this\nmodel, a numerical analysis is performed on the ballistic characteristics of the projectile, and the trajectory of the dual-spinning\nprojectile is filtered with the unscented Kalman filter algorithm, so that the measurement information of projectile onboard\nequipment is more accurate and more reliable measurement data are provided for the guidance system. The numerical\nsimulation indicates that the dual-spinning projectile is mainly different from the traditional spinning projectile in that a degree\nof freedom is added in the direction of the axis of the projectile, the forebody of the projectile spins at a low speed or even holds\nstill to improve the control precision of the projectile control system, while the afterbody spins at a high speed maintaining the\ngyroscopic stability of the projectile. The trajectory filtering performed according to the unscented Kalman filter algorithm can\nimprove the accuracy of measurement data and eliminate the measurement error effectively, so as to obtain more accurate and\nreliable measurement data.
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