基于PXI总线的机载近导设备自动测试系统的研制

利用PXI模块仪器，组建了基于PXI总线的机载近导设备自动测试与故障诊断系统。给出了系统的硬件构成和软件设计方法，并讨论了将关系型数据库和专家知识应用到自动测试和故障诊断领域中去的实现方法。应用表明该系统具有实时数据处理能力以及拥有良好的人机交互界面，完全符合机载近导接收机的工艺检测标准。     

冲击响应谱在惯导减振防冲设计中的应用

根据冲击原理,研究惯导减振系统在半正弦冲击激励下的响应特性,绘制了惯导系统在半正弦冲击激励下的冲击响应谱图。根据冲击响应谱图,可为惯导系统防冲设计提供正确、有效的理论依据,同时,为使减振器同时具备减振、防冲两种性能,冲击响应谱对于减振器关键参数选择、减振系统优化也具有重要应用价值。最后文章依据该研究结论,对某惯导系统进行了实际设计计算。     

小型战术导弹捷联惯导算法及仿真平台研究

为减小系统编排的复杂程度,减小计算量,根据小型战术导弹射程近、飞行时间短的特点,建立了简化的惯导基本方程及相应的系统编排模型。在传统三子样旋转矢量算法的基础上,采用改进型三子样旋转矢量变量更新算法建立了捷联惯导仿真平台,并通过仿真验证了惯导方程简化的合理性和算法的正确性。     

有限状态机在捷联惯导系统软件设计中的应用

对有限状态机在捷联惯导系统中的应用作了比较全面的论述.首先,对有限状态机的数学模型进行介绍,然后分析了捷联惯导系统的一般组成和捷联惯导软件的特点.最后,详细介绍了有限状态机在捷联惯导系统软件设计中的应用.     

有限状态机在捷联惯导系统软件设计中的应用

对有限状态机在捷联惯导系统中的应用作了比较全面的论述。首先，对有限状态机的数学模型进行介绍，然后分析了捷联惯导系统的一般组成和捷联惯导软件的特点。最后，详细介绍了有限状态机在捷联惯导系统软件设计中的应用。     

基于DGPS的弹载捷联惯导系统性能评估技术研究

针对武器系统对弹载捷联惯导系统性能评估要求,对捷联惯导系统对准和导航精度评估方法展开研究,对比目前常用的固定区域平滑和固定点平滑算法的各自优缺点,设计了一种利用导航段载机和导弹惯导滤波数据对导弹惯导传递对准与导航误差进行评估的新算法;对算法进行了充分的数字仿真,仿真结果证明了所设计的算法更实用、更具有工程应用价值。     

基于环境函数矩阵法的惯导精度快速评估

惯导系统导航精度评估通常采用蒙特卡罗法,计算量巨大,为此提出了基于环境函数矩阵的导航精度快速评估方法。利用环境函数矩阵建立了惯导系统设计指标和导航精度之间的联系,从而可实现对导航精度的快速评估,也可根据导航精度反推对惯导设计指标的需求。与传统的蒙特卡罗法相比,该方法避免了大量弹道仿真计算,具有计算量小、速度快的特点,在惯导产品选购及论证等方面具有重要实用价值。     

捷联惯导系统振动耦合特性研究

建立了采用整体减振措施的捷联式惯导系统的空间振动动力学方程,从理论上详细讨论了振动耦合的不同形式及其原因,可为捷联式惯导系统的误差分析和减振系统的设计提供有效的指导.     

捷联惯导系统振动耦合特性研究

建立了采用整体减振措施的捷联式惯导系统的空间振动动力学方程，从理论上详细讨论了振动耦合的不同形式及其原因，可为捷联式惯导系统的误差分析和减振系统的设计提供有效的指导。     

惯导系统在动基座上的对准研究

动基座上惯导系统初始对准，系统信噪比弱，干扰信号强度较大，有用量测信号强度小，对准过程收敛慢。为提高惯导系统在动基座上的对准精度及对准快速性，设计了基于位置信息观测及递推滤波参数估计的对准方案，通过开路粗对准及舒拉调谐闭路估计精对准，实现游移方位惯导系统在动基座上的平台调平、航向确定及陀螺漂移测定，车载试验结果表明，所设计的方案，达到了较好的效果。     

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.