Influence of yawing force frequency on angular motion and ballistic characteristics of a dual-spin projectile
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- 作者：Yu Wang ; 15250996016@163.com" class="auth_mail" title="E-mail the corresponding author ; Jie Cheng ; Ji-yan Yu ; Xiao-ming Wang
- 关键词：Course correction fuze ; Dual-spin projectile ; Rotate speed
- 刊名：Defence Technology
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：12
- 期：2
- 页码：124-128
- 全文大小：1094 K
文摘
A roll-decoupled course correction fuze with canards can improve the hit accuracy of conventional unguided ammunitions. The fuze increases accuracy by reducing the effect of angular and translational motion produced by the cyclical yawing forces 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 forces is 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 of yawing force on angular motion. The calculated results illustrate that, when the rotational speed of the forward part is close to the initial turning rate, the total yaw angle increases and the flight range decreases sharply. Moreover, a yawing force at an appropriate frequency is able to correct the gun azimuth and elevation perturbation to some extent.