Influence of Yawing Force Frequency on the Angular Motion and Ballistic Characteristics of a Dual-spin Projectile

Abstract

A roll-decoupled course correction fuze with canards can improve the accuracy of conventional unguided ammunitions cheaply and effectively. These types of fuzes increase accuracy by reducing the effect of angular and translational motion produced by the cyclical yawing force applied on the projectile. In order to investigate the influence of yawing forces on angular motion, a theoretical solution of the total yaw angle function with the cyclical yawing force will be deduced utilizing the 7 degrees of freedom (7-DOF) model designed for this calculation. Furthermore, a detailed simulation is carried out to determine the influence rules. The results will indicate that when the frequency of yawing force is close to the initial turning rate, the total yaw angle will increase, and the range will decrease sharply. Moreover, a yawing force at an appropriate frequency can correct the gun azimuth and elevation perturbations to varying degrees.