一种具有活动隔板的拉发式延时切割器

为解决高速无人机在空中的平稳开伞问题,研究了一种具有活动隔板的拉发式延时切割器。在切割器中,设计了一个具有传火和闭气功能的活动隔板,并采用了低感度、高燃速的气动药。实验结果表明：该拉发式延时切割器具有切割力大、喷火小的特性,从而满足无人机主伞准确开伞的要求。     

基于MEMS技术的EFI芯片起爆HNS-Ⅳ炸药试验研究

采用MEMS技术制备了一体化集成的EFI芯片,研究了EFI芯片起爆HNS-Ⅳ炸药的能力,试验结果表明在起爆电压高于2 400V下EFI芯片能够成功起爆HNS-Ⅳ炸药,并且可靠地剪切出飞片。设计了3种桥箔和加速膛尺寸匹配关系的EFI芯片,用兰利法测试其发火感度。结果表明桥箔尺寸为0.3mm×0.4mm、加速膛直径为0.3mm时,EFI试验件的发火感度最高,50%发火电压为1 928V,全发火电压为2 013V。     

半导体桥对含能材料的点火特性研究

在10μF钽电容放电激励下,对两种阻值相当质量不同的半导体桥(SCB)和细化的发火药剂斯蒂芬酸铅(LTNR)和叠氮化铅(PbN6)所组成的发火件进行了实验研究,根据发火件的电特性变化和发火现象发现半导体桥存在电热发火、电爆发火和等离子体发火三种情况,测试了SCB/LTNR和SCB/PbN6发火件的50%发火电压和发火时间。结果表明半导体桥的发火电压阈值不仅与发火药剂有关,还与半导体桥换能元有关,所以半导体桥的设计存在最佳质量,通过对比得知LTNR比PbN6感度高,PbN6比LTNR的燃速高。     

对破甲弹压电引信“未命中目标”时可靠发火性能的探讨

从部队实弹射击训练要求出发，探讨了破甲弹引信在“未命中目标”时可靠发火的必要性．通过理论分析和对比实验阐明了单一的压电发火机机构难以保证“未命中目标”可靠发火这一客观事实．提出了破甲弹引信确保“未命中目标”可靠发火的设计原则．     

复式点火技术研究

针对垂直发射导弹武器系统可靠点火问题,提出了复式点火方案：分别利用一个常规瞬发电发火管和一个延期电发火管,通过独立的点火电路的传火通道实现发动机复式发火,点燃共用点火器,最终满足复式点火要求。技术难点在于点火器设计和制造技术、发火管小型化设计技术、延期发火管设计和制造技术。经过两年研制工作,发动机复式点火设计要求基本满足,但点火装置在设计工艺方面仍需不断完善、提高,其全面性能指标仍需进一步考核验证。     

对破甲弹压电引信“未命中目标“时可靠发火性能的探讨

从部队实弹射击训练要求出发，探讨了破甲弹引信在“未命目标”时可靠发火的必要性。通过理论分析和对比实验阐明了单一的压电发火机机构难以保证“未命中目标”可靠发火这一客观事实。担子同破甲弹引信确保“未命中目标”可靠发火的设计原则。     

Ni-Cr桥丝式电火工品发火规律

选取了塑料和玻璃两种基体的5种不同桥丝直径的Ni-Cr桥丝换能元与发火药剂斯蒂芬酸铅(LTNR)组成的发火件为研究对象,用D-最优化法测试了这10种发火件的临界发火电压,然后通过对实验过程中的V-I-R曲线的分析发现:当激励电压较高时,12μm、16μm塑料基体的桥丝发火件和16μm、20μm的玻璃基体的桥丝发火件的电压电流曲线会有二次峰值,实验过程中有等离子体出现;相同直径不同基体的桥丝/LTNR发火件的临界发火电压不同;基体对发火件的发火性能没有影响。     

新型电发火件的设计和试验

新型电发火件是用于新型特种系列弹发射装药的电发火元件 ,工作于复杂的电磁场环境中.本文介绍了新型电发火件的结构设计,所用材料的选择及电发火件的电流感度、静电感度、引线强度、电磁兼容性等试验情况,得出新型电发火件满足性能指标及使用要求的结论.     

手榴弹(四)

根据发火作用过程(配用引信)的不同,手榴弹可分为延期手榴弹、触发手榴弹、触发延期双作用手榴弹三种类型。而延期手榴弹根据延期方式的不同又可分为摩擦发火手榴弹、击发发火手榴弹和电发火手榴弹三种类型。3.1.5 延期手榴弹 投掷后,延迟一定时间才起爆的手榴弹。配用延期引信的类型有三种:(l)摩擦发火件引信;(2)击发发火件引信;(3)电发火件引信。对手榴弹延期装置的基本要求是:符合规定的延期时间和一定的时间误差;较好的火焰感度;足够的火焰输出;足够的机械强度;燃烧可靠,不熄火;长期贮存性能稳定。延期手榴弹是一种被广     

一种高安全性钝感电起爆器的设计

针对某钝感电起爆器1.5A/2.25W5min不发火的钝感要求和通6A/20ms直流电流可靠发火的要求,通过分析影响电起爆器安全性、发火可靠性及作用时间的影响因素,进行了相关设计及试验。研究表明:合理的散热结构与桥路设计,以及钝感耐高温药剂设计可满足高安全性与可靠发火要求;点火药剂中金属锆粉粒度小于2μm、粘合剂氟橡胶含量为0.5%、压药压力为85MPa时,发火时间精度最佳。该设计为电起爆器类火工品的钝感化研究提供一种新的思路。     

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.     

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.     

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.     

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.