【作者】 陈勇巍；

【导师】 张合；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2007， 博士

【摘要】 随着新世纪战争形势的变化,为了适应复杂多变的战场环境,实现高效毁伤的目标,研制命中精度高、可灵活控制的智能化弹药成为各国军工领域的热点。弹道修正弹是一种典型的智能化弹药,其重要特征之一是能实时辨识自身的滚转姿态角,随后驱动弹上执行机构对弹道方向进行修正,达到精确打击的作战效果。本文对基于地磁探测的弹丸滚转角辨识系统关键技术进行系统的研究。介绍地球磁场的形成机理、作用特征及常用的地球磁场计算模型,对地球磁场应用于弹丸滚转角辨识系统的可行性进行了分析,采用三次样条插值法对地球磁场参数进行插值运算,介绍可用于地磁探测的磁敏传感元件。以地磁学、外弹道学、空间飞行器动力学为理论基础,分别建立直射弹道与曲射弹道环境下,使用不同维数磁敏传感元件的弹丸滚转角辨识系统数学模型,介绍极点连线法、查表法、分段线性法三种弹丸滚转角解算方法,研究不同方法所产生的滚转角解算误差,此外还分析了弹丸摆动所造成的解算误差。采用小波分析技术对弹上地磁测量信号进行处理,使用不同的小波函数进行信号分解、滤波与奇异值分析,通过有效的数字信号处理过程,深入了解弹丸实际工作规律,并为弹上其他工作模块提供有价值的前端数据。从电磁兼容的基本理论出发,结合弹丸滚转角辨识系统的实际工作环境,深入分析其电磁兼容性,进行基于地磁探测的弹丸滚转角辨识系统电磁兼容性设计,包括电磁屏蔽设计、硬件抗干扰设计、软件抗干扰设计。针对基于地磁探测的弹丸滚转角辨识系统的工作特点与实验验证需求,设计接触式装定系统、滚转角解算系统、滚转角外部测量系统,介绍各系统的软硬件实现方案。最后以某型弹道修正弹滚转角辨识系统为试验平台,对该系统的抗冲击性、电磁兼容性、信息装定准确性、滚转角辨识精度进行了试验研究,试验结果表明基于地磁探测的弹丸滚转角辨识系统原理可行,并已具有较高的应用价值。更多还原

【Abstract】 With the change of war situation in the new century, in order to adapt the complex battlefield environment, realize the goal of effective damage, the development of high precision and intellectualized ammunition which may be controlled nimbly become hot spot in various countries’ war industry domain. The trajectory correction projectile is one kind of typical intellectualized ammunition, one of its important characteristics is that it can identify real-time rolling angle itself, then correct trajectory by implementing machine, attacking the target precisely. This paper research the key technology of projectile rolling angle identification system based on geomagnetism detection.Introducing the geomagnetic field formation mechanism, function characteristic and common geomagnetic field computation model, analyzing the feasibility of geomagnetic field application in projectile rolling angle identification system., using cubic interpolation spline to interpolate the geomagnetic field parameter, introducing some magnetic sensors which may be used in geomagnetism detection.Based on geomagnetism, ballistics and aircraft dynamics, projectile rolling angle identification system model using various dimensions geomagnetic sensor are explored in straight trajectory and curve trajectory. Three methods for calculating projectile rolling angle are put forward, including extreme point connection, table lookup and partition linearity, rolling angle calculation error according to every method are analyzed. In addition the error caused by projectile oscillation is analyzed.Processing the projectile geomagnetism measuring signal based on wavelet analysis theory. Different wavelet functions are used to decompose and filter the signal, the strange value of signal is analyzed. Understanding the projectile working rule via effective digital signal process, provide valuable data to other working modules.Projectile rolling angle identification system electromagnetic compatibility is analyzed based on EMC theory and actual working condition. The EMC design procedures of projectile rolling angle identification system are presented, including electromagnetic shielding design, hardware anti interference design, software anti interference design.In view of the working characteristics and experiment demand of projectile rolling angle identification system, designing the contacting setting system, rolling angle calculation system and rolling angle external measurement system, introducing software and hardware realization plan.A kind of trajectory correction projectile rolling angle identification system is used as experiment platform. The system anti-impact capability, electromagnetic compatibility, information setting veracity and rolling angle measurement precision are test. The experiment results clearly show that the theory of projectile rolling angle identification system is feasible and the system has realistic values for practical uses.更多还原