鸭式布局双旋弹飞行动力学建模与仿真
首发时间:2013-01-28
摘要:为了发展具有精确打击能力的有控旋转稳定弹,对一类采用鸭舵控制的双旋结构旋转稳定弹进行了研究。分析了鸭式布局双旋弹的飞行原理,描述了其飞行动力学建模所用的坐标系,根据牛顿第二定律和动量矩定理,推导了七自由度刚体质心运动方程和绕质心运动方程,并讨论了作用在弹体上的诸力和力矩。编制计算程序对鸭式布局双旋弹的弹道特性进行了仿真分析,包括无控弹道前、后体转速变化特性、全弹攻角变化特性、弹道末段修正能力以及控制力和力矩作用下高速旋转弹体的攻角响应。仿真结果与其飞行原理吻合,符合外弹道理论,验证了所建模型的合理性,可用于指导该类有控弹箭的总体设计。
关键词: 飞行动力学 双旋弹 鸭舵控制 刚体动力学 建模 仿真
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MODELING AND SIMULATION OF FLIGHT DYNAMICS FOR DUAL-SPIN PROJECTILES EQUIPPED WITH CANARDS
Abstract:To develop the precision spin-stabilized projectiles, a type of dual-spin projectiles equipped with canards is studied. The flight principle of the canard control dual-spin projectile is briefly analyzed. The reference frames for flight dynamics modeling are described. According to Newton's second law and moment of momentum theorem, the seven-degree-of-freedom rigid body flight dynamics equations are derived. And the forces and moments acting on the projectiles are discussed. The flight properties of dual-spin projectiles equipped with canards is analyzed and simulated through computer programming, including the variation of spin rate for forward body and aft body without control, the variation of angle of attack without control, correction authority during terminal areas and the response of angle of attack with the action of canard control. The simulation results are in accordance with the flight principle and theory of exterior ballistics, which verifies the reasonableness of the established flight dynamic model. The results can be used to guide the total design of this type of guided projectiles.
Keywords: flight dynamics dual-spin projectile canard control rigid body dynamics modeling simulation
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