一种空间拦截导引规律的设计

引用趋近律及自由递阶控制的概念,研究了简约型非线性系统的变结构控制问题,给出了一种非线性切换函数σ(x)的确定方法。在推导出拦截器与目标相对运动方程的基础上,基于变结构控制方法设计了一种非线性导引规律。结果表明,比例导引规律是该非线性导引规律的特例,仿真结果证实了该非线性导引规律的优越性。     

反舰导弹速率捷联惯导控制系统方案

介绍了用两个挠性陀螺和两个挠性加速度计构成的速率捷联惯导系统的基本原理,以及将速率捷联惯导系统应用于反舰导弹的控制系统方案。进行了稳定回路和自动导引系统的设计。在参考自动驾驶仪控制方案的基础上,给出了稳定回路的控制规律和自动导引系统的导引规律,并说明了用计算机实现前置比例导引规律的方法。     

一种用于全向快速追踪的导引规律

研究了一种用于全向快速追踪的导引规律。首先在相对运动学的基础上分析相对速度偏角的变化规律,然后推导基于相对速度偏角的导引规律,并与比例导引律结合形成复合导引规律,最后通过仿真表明了所设计的导引规律对全向快速追踪的有效性。     

比例导引律在机动弹头激光末制导系统中的实现

比例导引律是当前研究最活跃和应用最广泛的制导规律之一,文中试图将其应用于机动弹头激光末制导系统的方案研究和设计.从分析某型激光导引头的工作原理入手,较为深入的讨论了比例导引律对激光导引头的要求,分析了激光导引头比例导引信号的形成与工作过程,并建立了导引头小回路的简化控制模型.由于机动弹头末制导的控制可以分解到俯冲和转弯两个控制平面上分别进行控制,故应用二次型最优控制理论对其比例导航参数分别进行了设计,为下一阶段工程设计的顺利开展提供了参考.     

比例导引法在全向攻击中的运动学特性研究

应用解析法和数字仿真,研究了比例导引法在全向攻击中的运动学特性。分析了在迎击和尾追攻击目标时对导引比例系数K要求的差异,从中找出适应全向攻击目标的比例导引规律特征。     

比例导引法三维弹道仿真分析

简要介绍了导弹的导引规律.以比例导引法为例,采用预报-校正法给出了比例导引法的差分方程,结合使用M atlab语言,对比例导引法的导弹弹道进行了三维仿真,绘制出舰空导弹的垂直发射弹道,分析了导弹速度、目标速度以及比例导引系数的变化对弹道的影响.     

地空导弹比例型末制导律的仿真研究

本文对某型地空导弹比例型末制导律的最优性问题进行了系统的仿真研究。文中给出了末制导系统的数学模型，提出了五种适合于地空导弹比例型末制导的导引规律。在某型号预研地空导弹的四条典型弹道上对所提出的导引规律进行了全面的仿真研究。结果表明：本文给出的的四种制导规律要比比例导引规律制导性能优越的多，有更好的制导精度，不失为地空导弹比例要制导律的一种最佳选择。     

BTT导弹导引规律述评

导弹BTT控制技术的研究始于70年代。为提高战术导弹的性能,研究适合BTT控制特点的导引规律是研究BTT控制技术的重要任务之一。导引规律一般是指利用制导信息形成控制指令。与STT控制不同,研究BTT导弹的导引规律时,不能将导弹视为一质点,而应视为一刚体,考虑其在空间的运动姿态。本文对当前研究BTT导弹的导引规律做了介绍,并对几种不同的导引规律做了比较,最后指出了设计BTT导弹导引规律时,应解决的几个主要技术难题。     

半主动雷达地空导弹制导律性能分析

在半主动雷达地空导弹的建模基础上,通过对比例导引律、扩展比例导引律和现代最优导引律三者的理论及仿真对比分析。明确了三种导引律在不同参数条件下制导精度性能的优劣,对半主动雷达地空导弹导引规律的设计具有重要意义。     

滑翔弹头末段俯冲导引律设计与仿真

滑翔弹头长期飞行在气动环境较为复杂的临近空间,再入精度难以保证。为实现滑翔弹头精确打击并考虑攻击角度的战术使用需求,文中在目标坐标系中建立了滑翔弹头质心运动方程,推导了基于扩展比例导引的带落速方向控制的末段俯冲导引规律。仿真结果表明,在合理的俯冲起点参数要求范围内,采用文中制导规律,能够实现对落点和攻击角度的精确控制。     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Robust Graded Sliding Mode Tracking Control for Low Speed Spinning Ballistic Missiles

The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent ＂explosion of terms＂. Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.