Flight stability of a dual-spin projectile with canards

Dalin Zhu, Shengjing Tang*, Jie Guo, Rui Chen

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

40 引用 (Scopus)

摘要

The concept of roll-decoupled course correction fuze with canards can provide a cost-effective solution to improve the delivery accuracy for conventional unguided ammunitions. Due to the dual-spin configuration and canards for such a projectile, the basic projectile stability theory should be extended to well perceive its behavior of motion. The seven degree-of-freedom dynamic equations of motion for the dual-spin projectile are established in the fixed-plane frame and the differential equation for the complex angle of attack is derived by the use of the projectile linear theory without the assumption of a flat trajectory. A revised stability criterion is established according to the Hurwitz stability criterion and analytic solutions of the stability boundaries for trim angles are developed. The new stability criterion can account for the possible flight instability of projectiles subjected to side forces applied at the nose, and can be reduced to the same form as the conventional spin-stabilized projectile case. Moreover, detailed trajectory simulations of two sample projectiles indicate that the new stability criterion gives satisfactory agreement with numerical results.

源语言英语
页(从-至)703-716
页数14
期刊Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
229
4
DOI
出版状态已出版 - 16 3月 2015

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