鸭式布局双旋弹转速特性分析
Analysis of Spin Rate Properties for Dual-spin Projectiles Equipped with Canard Surfaces
摘要
为发展具有精确打击能力的有控旋转稳定弹，以一类采用双旋结构的鸭式布局旋转稳定弹为对象，对其转速特性进行了研究。考虑该类弹箭的前、后体以不同转速绕弹体纵轴旋转，针对计及两体差动滚转的绕质心运动动力学模型，采用数值方法对前、后转速变化规律进行了仿真研究，分析了不同因素对转速特性的影响，并对由此引起的偏流和攻角变化进行了讨论。在不同条件下对前、后体转速动力学模型进行解析求解，分别得到了简化形式和耦合形式的解析解，并据此对前、后体转速特性进行了定性分析。理论分析及仿真结果表明，舵面作用、两体极转动惯量比及两体间的滚转约束等对双旋弹前、后体转速具有不同程度的影响，通过合理设计这些参数可获得所需的转速特性，为后续开展制导控制方案设计等提供了依据。
Abstract
To develop the guided spin-stabilized projectiles with high hit precision, the spin rate properties of a type of dual-spin projectiles equipped with canards is investigated. By taking into account the different spin rates of the forward body and aft body along the projectile's longitudinal axis and aiming at the dynamic model of motion around the point mass considering the differential spin rates, the variation law of spin rates for forward and aft bodies was studied by numerical simulation. The influence of different factors on spin rate property was analyzed and the subsequent change of ballistic drift and angle of attack were also discussed. The dynamic model of spin rates was solved analytically under different conditions. Both the simplified and coupled analytical solutions were obtained, based on which the spin rate characteristics were also analyzed from analytical point of view. The results of theoretical analysis and numerical simulation indicate that the spin rates of forward and aft bodies are influenced by canards action, the ratio of the moment of inertial for two bodies and the constraint between two bodies in varying degrees. Required spin rates for forward and aft bodies could be acquired by virtue of designing corresponding parameters to a reasonable degree. It is useful for further research on the design of guidance and control scheme.关键词
飞行动力学/双旋弹/转速/鸭舵控制/弹道特性/差动自旋Key words
flight dynamics/dual-spin projectile/spin rate/canard control/ballistic property/differential spin引用本文复制引用
常思江,刘铁铮,李岩.鸭式布局双旋弹转速特性分析[EB/OL].(2013-05-30)[2026-04-01].http://www.paper.edu.cn/releasepaper/content/201305-483.学科分类
弹药、引信、火工品/航空航天技术
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