一种改进的野值在线预处理3σ方法

无人机的导航和控制工程实践中，惯性测量单元测量值中．野值的在线预处理一直是难点之一。在分析输出信号特点值功率谱密度变化规律的基础上，调整方差计算范围并确定门限值．对经典的3σ方法进行了改进。仿真计算和实际工程应用表明，该方法有效地拓展了3σ方法的应用范围．很大程度上消除了野值对滤波精度的影响。     

火炮总体设计中几个问题的分析

根据某火炮的结构特点和分析要求，把一些工程元件简化成刚体，另一些工程元件简化成弹簧，用有限多个质量、转动惯量、弹簧和阻尼形成一个离散的参数系统，从而得到火炮系统的简化模型。通过对模型的讨论，运用机械结构动力学的理论，分析了火炮总体参数中的Le值、Ld值、起落部分的刚度系数k以及弹丸的质量偏心和身管的制造误差对火炮发射瞬间的炮口扰动的影响，定量分析了影响炮口扰动的因素。     

自行加榴炮的火炮自动瞄准系统

简要介绍了自行加榴炮的自动瞄准系统，该系统在应用平台式惯导系统的前提下，用自动调炮的数学模型，在火炮方位与高低调炮时发生了耦合现象，提出了解耦方法，并给出工程实现方法。     

μ-synthisis方法在结构一声耦合系统鲁棒控制中的应用

以在工程中普遍存在的封闭空间结构一声耦合系统为对象，基于鲁棒结构奇异值理论，建立了结构一声耦合系统鲁棒主动控制模型，提出了设计鲁棒μ-synthesis。控制器的方法：通过引入虚拟的不确定块，将耦合系统响应性能的问题转化为广义系统的稳定鲁棒性问题，采用标准D-K迭代法求解该增量系统的稳定鲁棒控制器。封闭空间结构一声耦合系统的控制仿真表明，同鲁棒H∞控制结果相比，μ-synthesis方法对模型不确定性具有良好的稳定鲁棒性和性能鲁棒性。同以往的研究相比，新意在于应用μ-synthesis方法设计了结构一声耦含系统鲁棒控制器，以克服H∞控制器的不足。     

载体机动和磁干扰环境下的航姿算法研究

针对强机动、磁干扰环境中姿态解算精度不高的问题,结合目前航姿系统小型化、低成本的工程应用要求,提出了一种新型姿态解算算法。该方案利用自适应卡尔曼滤波对传感器测量值进行预处理,利用梯度下降法完成对处理后测量值的姿态解算与姿态融合,使航姿系统具有了抗机动性扰动能力。同时,本课题对传统卡尔曼滤波模型进行了简化,减小了算法运算量,提升了该方案的工程实用性。为验证算法的可行性,本课题基于提出的解算算法对航姿系统进行了实物实现,并设计了机动性实验对该航姿系统进行了机动测试。实验结果表明,载体在磁干扰较强的环境下进行强机动运动时,与低成本MEMS-AHRS系统的主流算法(互补滤波姿态解算法)相比,本课题设计的航姿系统能输出更加准确的姿态结果。     

遥测实测信号的奇异值滤波

在实际的工程测量过程中,噪声与系统固有信号往往是混叠而难以分离.为了对后续测量进行改进,需要对遥测信号进行精处理.如何剔除或抑制噪声,提取出测量信号中的固有信号,是对遥测数据进行精处理的基础.文中提出应用奇异值分解理论对遥测信号中的电量信号进行滤波处理.针对奇异值分解中有效秩对矩阵重构的重要性,应用统计聚类分析方法确定奇异值分解中的有效秩.通过与传统中值滤波结果进行比较,说明文中提出的方法能够应用于遥测信号的滤波处理中.     

基于VRML技术的弹药工程仿真

将目前发展的虚拟现实建模技术（VRML）与弹药工程仿真可视化技术有机结合，采用VisualBasic与VRML2．0技术编程，开发了基于射击迹线模型（shot-linemodel）的战斗部破片场仿真系统和防空导弹引战配合仿真系统，证明了VRML技术开发的可视化应用具有简洁、快速的特点，同时也为VRML技术的应用提供了新的范例。     

基于LabVIEW的应变测量与报警系统设计

设计了一种基于虚拟仪器设计软件LabVIEW的动态应变测量、报警系统，分析了电阻应变片式电测法的检测原理，并使用恒流源和自动调零放大器来提高仪器的测量精度。用户可实时测得应变值和其变化情况，并预先设置应变报警值来达到对被测元件的结构进行实时监测的目的，以提高工程结构的强度和安全性。该系统同时设计了数据、波形的存储功能。系统测量精度高，检测效率高，操作方便、简单易用。     

弹道导弹SINS空中在线标定方法

从工程应用的角度出发，利用高精度的GPS信息，研究了一种弹道导弹捷联惯导系统（SINS）空中在线标定方法，建立了发射点惯性系下SINS的误差模型，应用分段线性定常系统（PWCS）的可观测性分析理论和奇异值方法，定量地研究了系统状态变量的可观测度。针对SINS初始失准角及惯性器件误差所造成的导航误差，利用弹载GPS得到的速度和位置量测信息，通过最优估计的方法标定出SINS的导航误差，并采用误差状态转移算法反推初始平台失准角，从而为导弹的后续飞行提供精确的惯性器件误差系数和姿态基准。通过仿真验证了弹道导弹SINS空中在线标定方法的正确性和可行性。     

复合制导信息处理中的时钟匹配技术

在部分复合制导应用中,不同测量系统无法使用同一时钟,也无法完成系统对时,时钟不匹配将会产生较大误差。针对这种情况,文中使用线性插值时间校准方法来完成时间校准,并通过仿真分析了时钟匹配的影响以及测量值插值输出对减小误差的作用,结果表明测量值插值输出可以很大程度上改善误差,具有较强的工程实际应用价值。     

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.     

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.     

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。     

Stability of the Third Generation Intensifier under Illumination

The stability under illumination of transmission-mode GaAs photocathode sealed in the third generation intensifier is investigated by use of spectral response testing instruments. The variations of spectral response with the illumination times under weak and intense illumination are compared. The variations of photoemission performance parameters are also characterized. The results show that during initial several weak illuminations photocathode behaves no evident decay and a maximum sensitivity is achieved, while under intense illumination the sensitivity of photocathode begin to decrease largely at the first illumination. The calculated performance parameters show that the variation of surface escape probability with illumination times is a direct cause of instability of photocathode. It is also found that under intense illumination peak wavelength is moved towards short-wave and peak response is decreased, which shows that the ability of long-wave response of photocathode is decreased.     

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.     

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.     

Design and Implementation of One Missile Visual Simulation System Based on OpenGL

The implementation of a missile＇s visual simulation system is explained that is developed with OpenGL（open graphic library） and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile＇s data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.     

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.     

Dynamic Encryption Technology in Ad-hoc Networks

A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.