双目标鱼雷连续射击可行性分析

潜艇使用声自导鱼雷连续射击是提高潜艇战斗力的有效途径，研究了潜艇使用声自导鱼雷对双目标连续攻击问题，分析了攻击过程中鱼雷使用的基本要求，解决了鱼雷自导装置互导、爆炸相互影响和航行途中相互碰撞等问题，在此基础上，通过对潜艇攻击护航运输编队和战斗舰艇编队的射击阵位进行深入分析，制定了潜艇在占领不同射击阵位时所应采用的连续射击方案及组织实施措施，为潜艇部队组织实施连续射击提供了重要参考。     

潜射声自导鱼雷两雷平行航向齐射遮盖目标散布

建立了潜艇使用声自导鱼雷两雷平行航向齐射攻击目标的数学模型,对两雷平行航向齐射遮盖目标散布的规律进行了研究.研究结果表明,在对潜艇以一定的精度解算出目标运动要素的情况下,在中等射距、允许的目标舷角范围内,声自导鱼雷两雷平行航向齐射可以遮盖目标散布;目标散布随目标舷角的变化有最小值,但两雷齐射声自导搜索带始终能够遮盖目标散布;随射距的增大,潜艇可以选择的射击阵位范围减小,为了扩大射击阵位的选择范围,潜艇应适当控制射距.     

俄罗斯鱼雷简介

本文根据《俄罗斯海军水下武器》(“RUSSIA'SNAVAL UNDERWATER WEAPONS”)杂志中有关鱼雷的信息,简要介绍了俄罗斯目前在役鱼雷的主要战术指标。 1 SET-65MKE电动力自导鱼雷 SET-65MKE电动自导鱼雷用于攻击潜艇。它既可从潜艇发射,又可从水面舰艇上发射。该雷装有主、被动声自导系统,可用来搜索低噪声级的机动目标。航向、深度和横倾控制系统保证鱼     

基于应急条件下潜艇自导鱼雷连续射击仿真

成功解决了连续射击两枚鱼雷的自导装置互导问题、鱼雷爆炸影响问题、以及引信相互干扰问题;其次,对鱼雷射击参数范围进行了详细分析;采用VisualC＋＋编程,仿真计算出了目标等速直航和目标规避机动两种情况下连续射击各枚鱼雷的最优提前角,分析了最优提前角的变化规律．     

多功能声自导反潜鱼雷战雷靶

针对缺乏用于声自导反潜鱼雷战雷实航爆炸试验攻击目标的问题,提出一种具有水声引信的多功能战雷靶设计思路.介绍多功能声自导反潜鱼雷战雷靶的设计方案,利用经典物理学的能量、动量原理,详细计算分析鱼雷在各种边界条件下攻击钢架的情况,并简要分析海流对鱼雷命中的影响.仿真结果表明:当Δt≤0.4 s时,鱼雷瞬间冲击加速度a(g)≥5g,满足引信动作需求,鱼雷可以引爆.该战雷靶的设计思路可为未来鱼雷声自导反潜战雷实航爆炸试验提供技术参考.     

线导鱼雷作战使用方法研究

结合潜艇和鱼雷武器的作战使用特点,对线导鱼雷作战使用中的有关同题作了较全面的论述,并将声自导和尾流自导两种使用方式下的线导导引方法有机地融为一体,给出了通用的线导鱼雷射击导引方法的工程化数学模型。     

现代轻型鱼雷定向命中的数字仿真研究

双层壳体潜艇对轻型反潜鱼雷提出了新的要求，由于鱼雷装药量有限，需要采用定向装药来保证理想的毁伤率。在攻击的最后阶段，完成与定向装药相一致的定向命中，即有角度约束的命中是轻型鱼雷自导系统的主要任务。考虑到声自导头、信号和数据处理以及导引律，技术方案的优化和验证必须经过数字仿真。在这一阶段，要预先建立表达目标结构和近场声特性的模型。在攻击阶段必须保证起主要作用的鱼雷功能块的建模精度，尤其是自导系统，鱼     

自航式声诱饵对抗声自导鱼雷作战能力仿真分析

使用自航式声诱饵对抗自导鱼雷、优化其对抗作战方案是进行理论研究和潜艇防御作战的重要问题。针对潜艇发射自航式声诱饵对抗主动声自导鱼雷作战态势,采用均匀设计试验法和时间序列仿真法,依据潜艇、鱼雷和自航式声诱饵之间的位置、状态,主动声纳方程以及鱼雷捕获命中目标的判据,对不同报警距离和报警舷角下潜艇的生存概率进行了仿真计算,并对仿真结果进行分析后得出了有利于潜艇生存的规避方式,对于自航式声诱饵对抗声自导鱼雷无论是从理论研究、试验设计还是作战层面来讲,都具有重要的参考意义。     

潜射反潜自导鱼雷平行航向齐射遮盖目标散布研究

在获取的目标运动要素不完整或目标运动要素误差较大的情况下,潜艇发射反潜自导鱼雷攻击敌潜艇存在较大目标散布。为了提高命中概率,潜艇应组织反潜自导鱼雷齐射。在研究了潜射反潜自导鱼雷平行航向齐射组织方法的基础上,建立了反潜自导鱼雷平行航向齐射遮盖目标散布的数学模型,对不同战术态势下、不同雷数齐射遮盖目标散布的情况进行了计算。研究表明：在设定的战术条件下,中等射距以内2发雷齐射可以遮盖目标散布;大射距大目标运动要素误差情况下4发雷以上齐射可以遮盖目标散布。由于设定的战术条件是任意的,因而研究结论对于潜射反潜自导鱼雷平行航向齐射具有普遍意义。     

潜射线导鱼雷蛇形弹道设计及仿真研究

在线导鱼雷攻击过程中,当只有目标方位信息且目标舷角很小时不利于鱼雷捕获目标,为解决该问题,阐述了蛇形弹道搜索的概念,提出了2种线导鱼雷蛇形弹道搜索使用时机。建立蛇形弹道搜索控制模型,并进行了仿真验证。研究结果表明：采用线导加尾流自导蛇形弹道搜索在只有目标方位信息且小目标舷角情况下可以有效提高鱼雷捕获目标尾流的概率,为解决进入尾流舷别不确定给攻击带来的问题,又提出了利用尾流自导加声自导攻击目标的组合使用方法,该方法可保证鱼雷命中目标概率;采用线导加声自导蛇形弹道搜索在目标方位无效情况下可以有效扩大鱼雷机动范围,捕获目标概率要高于直航搜索捕获目标概率。     

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.     

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。     

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.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.