【作者】 周思渊；

【导师】 刘世平； 韩子鹏；

【作者基本信息】 南京理工大学 ， 兵器发射理论与技术， 2010， 硕士

【摘要】 稳态扫描技术是末敏弹研制过程中关键技术之一,关系到能否准确打击目标。本文采取的是在现有稳态扫描的基础上采用双翼无伞来达到所需条件。无伞末敏弹是针对有伞末敏弹留空时间长、受风影响大而提出的一种改进设计方案。本文的主要工作是：首先建立末敏弹被抛出去之后的刚体弹道模型,为双翼打开后的弹道计算提供一定的初始参数；然后双翼打开后,分析双翼以及弹体的受力状况,从而用欧拉角法分别建立其转动轴与铅直轴重合、与铅直轴有一定夹角的系统弹道模型并编程进行比较。由于末敏弹在运动过程中的大姿态运动,俯仰角可能达到90。,因此用四元数法对方程组进行变化,通过计算对比并进行分析。通过计算结果分析说明了,在全弹道飞行条件下,旋转轴与惯量主轴越靠近时的弹道模型计算效果优于绕铅直轴旋转的弹道模型的计算效果；四元数法优于欧拉角法描述末敏弹的大幅度姿态飞行弹道,用四元数法可以解决因用欧拉角法描述末敏弹旋转运动时方程退化的问题。更多还原

【Abstract】 Stable scanning technology is one of the key technologies in the development process of the system of terminal-sensitive projectiles, which can affect the ability to strike targets accurately. Based on the existing stable scanning theory, this thesis uses two wings without parachute to achieve the required conditions.Terminal-sensitive projectile without parachute is an improved design project, focusing on the fact that the umbrella has a long retention time and is affected largely by wind.The main work of this thesis is:first of all, the rigid body trajectory model while terminal-sensitive projectile is throw out is established, with initial parameters for trajectory calculation where two wings open; secondly, the analysis of the stress state of terminal-sensitive projectile with two wings open is carried out, and Euler angle method is used to establish the system trajectory model with its rotation axis being the vertical axis, and the system trajectory model with its rotation axis has an angle from the vertical axis respectively, and comparing the simulation results.Since the big attitude motion in the process of terminal-sensitive projectile flight and the pitch angle may reach 90°,the quaternion method is used to change the equations and is compared with the Euler method.The simulation results show that the trajectory model with its rotation axis has an angle from the vertical axis is better than the trajectory model with its rotation axis being the vertical axis;the quaternion method is better than the Euler angle method to describe the terminal-sensitive projectile trajectory with large attitude, for the quaternion method can solve the equation degradation problem caused by the Euler angle method to describe the terminal-sensitive projectile rotating movement.更多还原