【作者】 桑保华；

【导师】 薛晓中；

【作者基本信息】 南京理工大学 ， 兵器发射理论与技术， 2006， 博士

【摘要】 本文以常规炸弹制导化改造工程项目为背景，围绕简易制导炸弹在大高度、大方向角投弹条件下有控弹道的设计问题展开分析与研究，内容涉及气动、弹道、飞行特性、控制及仿真等多个方面。 首先根据简易制导炸弹大高度、大方向角投弹条件下的气动特性和运动特点，建立了其空间运动的六自由度数学模型； 接着结合制导模式及坐标攻击形式，建立了简易制导炸弹的方案弹道数学模型并给出了弹道解算流程，分析了影响炸弹落点精度的若干因素，定义了投弹攻击区并优化设计了满足战术技术指标要求的方案弹道； 随后在小扰动法的基础上对炸弹的非线性微分方程作了线性化处理，建立了扰动运动方程，定义了动力系数并分析了炸弹的弹体扰动性能以及舵角阶跃偏转时的弹体动态特性； 其次结合炸弹弹体参数在大高度、大方向角投弹条件下的慢时变特性，提出了一种基于方案弹道弹体传递函数的神经网络直接自校正方法并给出了具体的算法及仿真实例； 再次分析了简易制导炸弹大高度、大方向角投弹条件下三个通道间的气动、力矩的交叉耦合情况，并且结合神经网络的优化思想，在不变性原理的基础上提出了一种与炸弹弹体固有参数相关的降阶动态解耦方法； 最后针对简易制导炸弹的有控飞行全过程，结合制导律发展了方案弹道的实时计算技术并进行了攻击区内大高度、大方向角以及有较大初始偏差这三种典型投弹条件下炸弹的有控飞行仿真。 研究成果对于简易制导炸弹的总体设计、半实物仿真、实物仿真、硬件实现以及飞机带飞等多项地面或空中实验有较好的参考价值。更多还原

【Abstract】 In this dissertation, design and research on simple guide bomb’s controllable ballistic trajectory with high initial altitude or big initial orientation angle is deeply developed on the background of project of changing our conventional bomb into guided bomb by using integrated design technology of pneumatics, ballistic, flying property, control and simulation. The brief research points are as follows:Firstly, the mathematical six freedom model of simple guided bomb’s extended range motion is established based on its pneumatic characteristics and its motive properties under high initial altitude or big initial orientation angle casting conditions.Following, the mathematical model of simple guided bomb’s project ballistic trajectory is established according to its guide mode and its attack form and the project ballistic trajectory’s calculation flow is provided, too. All kinds of factors that affect simple guided bomb’s fall point precision are offered and analyzed. The casting attack region is defined. Within this region, the project ballistic trajectories which meet with the tactics and technology guide line are designed optimally.Subsequently, the non-linear differential equation of simple guided bomb is transformed into linear equation with small disturbance theory and the disturbance motion equations are established. At the same time, dynamical coefficients are defined and simple guided bomb’ s disturbance properties are analyzed as well as its dynamic ones under the rudder’s step response.Next, a method of direct self-turning neural network control based on simple guided bomb’s body transfer function which is related to project ballistic trajectory is presented. The reason is that simple guided bomb’s dynamic parameters are taking on slowly time-varying property when the bomb is cast with high initial altitude or big initial orientation angle.And next again, the cases of coupling between simple guided bomb’s three channels are analyzed when it is cast with high initial altitude or big initial orientation angle. And an order-reduced dynamic decoupling method is introduced on the basis of invariability coupling theory which更多还原