脉冲电源输出电流精度影响因素分析

脉冲电源输出电流精度是实现电磁发射系统初速高精度控制的重要影响因素。为了全面分析脉冲电源输出电流精度,基于Simulink建立脉冲电源仿真模型,在脉冲形成单元中分别调整充电精度、电容精度和电感精度,分析其对输出电流精度的影响。除此之外基于脉冲形成网络,引入同步放电模块数量这一影响因素。最后通过脉冲电源模块和模拟负载开展试验验证,证明了仿真分析的正确性。结果表明,输出电流精度受充电精度的影响最为明显,受电容精度和电感精度的影响程度相近,此外输出电流精度随同步放电模块数量的增多而提高。该研究为高精度脉冲电源电气参数设计及元器件选型提供参考依据。     

便携式引信通用测试仪

针对现有引信测试系统设备分散、专机专用、操作繁琐等问题,设计了基于STM32的便携式引信通用测试仪,以完成对4种类型引信的检测。通过设计主控制模块、引信类型检测模块、遥测及模拟解保模块和通信模块等9个功能模块,采用引信类型快速识别、模拟解保信号可靠产生、遥测电压隔离测量等技术,该测试仪实现了对引信的自动识别、测试及结果判断,并可实时显示测试结果。实验结果表明,该通用测试仪测试精度高,操作简单可靠,性能稳定,达到设计要求。     

遥测数据处理中导出参数模块的设计

分析了在遥测数据处理中导出参数模块设计的必要性,介绍了该模块的系统组成、工作原理、关键技术以及在设计中应该注意的问题。该模块采用动态链接库的方式进行参数解调,利用多分路判断并解决表达式中参数的解调问题,简化了特殊参数的处理过程。经验证,达到了设计要求。     

大电流智能充电控制器在拖鱼中的应用

介绍一种大容量锂电池组智能充电控制器LTC4007在拖鱼中的应用,该控制器能对多节锂离子电池组进行大电流充电控制,且提供状态标示接口,便于外部扩展应用。实际应用表明,以LTC4007为核心设计的充电电路能较好实现拖鱼的各项应用需求。     

基于WINCE的某型车载记录仪CAN通信模块的设计

为实现与某型武器系统的无缝集成,文中提出了基于WINCE的某型车载记录仪CAN通信模块的研究与设计。该模块具有抗干扰能力较强的硬件结构,移植了WINCE嵌入式实时操作系统,并提出采用WINCE事件响应机制方法,实现CAN模块高速、可靠通信。试验表明,该设计通用性好,鲁棒性高,已经成功应用于某型武器系统。     

自动武器仿真专用模块的开发

对自动武器仿真设计的关键技术进行了分析，以自动动力学分析软件ADAMS为平台，开发了用于自动武器仿真设计的专用模块ADAMS／GUN。针对自动武器的工作特点，介绍了模块开发思想，详细叙述了内外弹道的计算、模型库的开发和载荷库的开发几方面的解决方法及界面实现。该模块的开发可以减少武器仿真设计时的工作量．提高工作效率。     

矿灯智能充电监测管理系统

为了对矿灯和矿工的动态信息进行管理,开发一套矿灯智能充电监测管理综合应用系统。该系统将矿灯充电管理与矿工管理结合起来,从硬件和软件2方面进行研究。硬件系统以P89c58等单片机为核心,采用AD数模采样技术,将矿灯充电数据数字化,实现对矿灯的各种充电状态进行监控。在通信方案中,采用分级串行通信技术使系统运行稳定,数据传输可靠。软件系统实现了矿工基本信息管理、矿灯充电管理、辅助考勤管理、矿灯状态实时显示、各种信息的查询与统计等功能。该系统为管理者及时做出决策、预防安全隐患和管理全面的矿灯与人员信息提供了依据,并已在部分中小型煤矿成功应用。     

基于UC3906的可充电多电压输出电源电路设计

针对便携式设备中所需供电电压日趋增多的情况,基于UC3906充电管理芯片设计了可充电多电压输出电源电路。该电源电路可在较宽的温度范围内实现对铅酸电池的精确快速充电,延长了蓄电池的使用寿命,并且可以提供数字电路中常用的7种电压输出。实验表明,该电路具有工作稳定、性能可靠等优点。     

基于Arduino控制器的智能垃圾桶设计

针对人们的日常需要,设计一种以Arduino开发板为控制器的智能垃圾桶.利用Arduino控制器模块、电源模块、语音识别模块、无线传输模块、超声波模块和电机驱动模块搭建垃圾桶的硬件电路,通过对单片机的开发以及各模块对比选用、程序调试,实现垃圾桶的功能.试验测试结果表明:该设计能实现语音或手机等通信工具对垃圾桶的控制和自主避障,具有一定的应用价值.     

无人地面车辆感应式充电试验装置研究

为了实现无人地面车辆机载蓄电池的自动充电,设计了旋转式耦合器和全桥式串联谐振功率变换器,并对谐振电路和主电路工作过程进行了仿真分析,最终研制了一种感应式充电试验装置。系列试验结果表明:所建立的主电路仿真模型符合实际,可以指导感应充电装置功率变换器的设计;随着耦合器气隙增大,电能传输效率呈现斜率渐缓式减小趋势;所设计充电装置能够在气隙1.2mm条件下实现蓄电池的恒流充电。     

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.