纳米RDX的撞击感度与分析

对实验室制取的粒径约为40nm和120nm的黑索今炸药粉体的撞击感度进行了测试,实验结果表明,随着粒径的减小,黑索今的机械撞击感度降低,纳米黑索今撞击感度的特性落高是普通工业黑索今的二倍左右.初步分析认为,这主要是由于纳米RDX炸药粉体之间的空隙太小,难以满足RDX由热点成长为爆炸的热点半径条件.     

火炸药相对和实际静电感度的对比分析

采用先进的测试系统对氮化铅、硝化棉、梯恩梯放黑索金的静电感度分别进行了一性测量和定量测量，得出了相对静电感度值和实际静电感度值，并对其进行了对比分析。     

工业雷管撞击感度试验装置研究

设计了一种测试工业雷管撞击感度的试验装置,并利用设计的试验装置测试了国内部分雷管样品的撞击感度。试验证明:设计的试验装置安全、可靠,操作方便,能够满足工业雷管撞击感度测试技术条件要求。     

纳米α-Al2O3对HMX撞击感度的影响

比较了单质炸药HMX和混合炸药HMX／纳米Al2O3落锤撞击试验，研究纳米α-Al2O3对HMX撞击感度的影响，并对纳米Al2O3在混合炸药中作用机理进行了探讨。结果表明，纳米α-Al2O3具有润滑作用，HMX／纳米Al2O3混合炸药的撞击感度随纳米α-Al2O30，添加量的增加而降低，添加2．0％(质量分数)纳米α-Al2O3混合炸药与单质炸药HMX相比，2．5kg落锤测试的50％爆炸特性落高(如)提高了13．1cm。     

亚稳态分子间复合物Al-MoO3的制备与性能研究

以纳米铝粉和纳米氧化钼为原料,采用超声分散混合的方法,制备了纳米复合含能材料Al-MoO3.利用扫描电镜(SEM)和红外光谱对原料和产物的结构进行了初步分析表征;进行了Al-MoO3撞击感度、火焰感度以及燃烧热性能试验.结果表明,该含能材料具有一定的撞击、火焰感度,是一种具有高的能量密度的纳米含能材料.     

可浇注固化PBX类含铝炸药低易损性研究

采用真空振动浇注-固化技术,制得了几种以聚合物弹性体端羟基聚丁二烯(HTPB)为粘结剂,以黑索金(RDX)为主体炸药的含铝炸药。结果表明：用硝基胍(NQ)或3-硝基-1,2,4-三唑-5-酮(NTO)代替部分RDX,炸药的撞击感度明显降低,其枪击、苏珊实验反应等级较低。这种低易损性的PBX类含铝炸药适用于一些高性能武器战斗部装药。     

固体FAE药剂感度试验研究

通过工业黑索今和固体FAE药剂的感度试验,研究了不同钝化条件下,工业黑索今和固体FAE的撞击感度和摩擦感度。研究发现:用石墨钝化工业黑索今,感度先升高后降低,钝化后的固体FAE撞击感度和摩擦感度均有所降低。此研究结果对FAE配方研究和使用起到一定的指导作用。     

高纯纳米HNS的制备与表征

采用溶液急冷重结晶和溶剂非溶剂重结晶相结合的方法得到了2,2′,4,4′,6,6′-六硝基茋(HNS)高纯纳米颗粒.经过纳米化后,HNS的颗粒形貌更为圆滑,粒度分布处于58.9～231.6nm之间,纯度由90.1％提高到99.44％,比表面积为19.27m2·g-1.撞击感度测试表明,纳米HNS的撞击感度较之原料HNS有所降低,冲击片感度提高.     

对含能硝胺压伸双基推进剂的研究

介绍了国外对含ＲＤＸ（黑索金）的高热值和低热值含能硝胺压伸双基（ＥＤＢ）推进剂燃烧性能和感度的研究。探讨了弹道改良剂对燃速和压力指数的影响。     

HMX/Cr2O3纳米复合含能材料的溶胶-凝胶法制备及表征

采用溶胶-凝胶(sol-gel)法和超临界流体(SCF)技术制备出HMX/Cr2O3纳米复合炸药。利用扫描电镜(SEM)和傅里叶变换红外光谱(FTIR)对其形貌和成分进行了分析和表征,测试了其热分解特性、撞击感度和摩擦感度。结果表明:HMX和Cr2O3在纳米尺度均匀复合,HMX/Cr2O3纳米复合炸药的粒度为30~50nm,近球形;与纯HMX原料相比,不同配比的复合炸药的融化峰温和分解峰温有显著的改变,撞击感度均显著降低,摩擦感度降幅较小。     

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.     

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.     

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.     

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.     

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.     

A Study on the Estimation of Aeroheating upon the Warhead Nose at Supersonic Speed

An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD （computational fluid dynamics） and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.