组合烟花用纸片对产品发射高度影响的探讨

通过实验研究了组合烟花纸片的不同放置形式以及不同发射筒内径下组合烟花的发射高度,分析了组合烟花中纸片对产品安全与质量性能的影响,实验表明目前通用的双纸片组是较为理想的组合烟花垫片方式.通过分析理论与实际发射高度的差异,提出了加大组合烟花的实验与理论研究的必要性.     

最新烟花专利摘要报道

烟花发射底座,发射类烟花发射座,安全引线连接器,一种安全的烟花表演及其发射方法,一种燃放烟花喷泉,一种带底的烟花外筒及其制造方法,一种文字燃放效果烟花,……     

礼花弹发射高度的激光电测法

提出了礼花弹发射高度测量的新方法——激光电测法。该方法是利用激光特性，依据光电测距原理，使用激光脉冲测距仪和经纬仪，快速、准确地测量礼花弹的发射高度。     

礼花弹发射高度研究

采用激光测高法（LHM）准确测量礼花弹发射高度,通过对测量数据的统计分析,寻找到目前礼花弹发射高度的分布规律,以指导产品的生产和工艺改进。     

烟花用电点火头作用时间的测量方法

采用菲涅尔透镜和光电传感器,设计了一种烟花用电点火头作用时间的测试装置。利用该装置测量了多型烟花用电点火头的作用时间,并与高速摄像法测量结果进行了对比。结果表明采用该方法与高速摄像法的测量结果一致,符合欧盟烟火标准的相关要求,适合烟花用电点火头的检验。     

一种烟花用微烟发射药的设计及其性能

烟花用发射药主要是黑火药,黑火药燃烧过程中产生大量烟雾,严重影响烟花的观赏效果,造成环境污染.为解决烟花发射过程中产生烟雾量大的问题,设计了一种新型微烟发射药,其各组分配比为:NC 77%,NH4CIO41 3%,端羟基聚丁二烯(HTPB)5%和钝感剂5%,对微烟发射药和黑火药的点火与做功能力、烟雾性能及机械感度进行了...     

烟花燃放效果图像测量方法的研究

介绍了一种烟花燃放效果检测的新系统.该系统利用图像分析设备与计算机程序相结合,对烟花的燃放效果进行仪器分析检测.实际应用表明:该系统能准确记录烟花燃放缺陷,提高烟花检测结果的可靠性,同时能记录效果性能参数,并可有效应用于烟花的研发设计.     

发射点定位误差对飞行器轨道融合解算精度的影响

在靶场试验中,发射原点初始状态(位置、发射方位角等)准确与否非常重要.依据轨道数据处理的流程,在理论上给出了发射原点误差对非线性融合方法解算外测轨道的影响.建立了发射原点不准对于发射坐标系与测量坐标转换的关系;并利用非线性融合算法,研究了发射原点的误差对轨道参数的影响.仿真计算结果表明,发射原点误差对于飞行器精度分析与精度鉴定有较大影响,需要重点考虑.     

光电立靶测试系统及精度分析

高射击精度是每一个武器装备系统主要指标之一。本文先介绍了四光幕光电立靶密集度测试原理，利用四光幕交汇法即可测得靶上与的相应值；接着对发射和接收器件的选取进行了说明并分析了测量精度。经试验验证该测试系统安全能满足目前枪弹产品检验试验的要求。     

两种天幕靶光幕交汇立靶测量系统分析

为了改善飞行弹丸立靶坐标测量系统的布置复杂、集成度低等缺点,提出了2种新型天幕靶的设计方法;根据立靶坐标的几何测量原理,采用单镜头双狭缝措施,设计了单镜头双狭缝交汇和单镜头双狭缝平行的天幕靶.利用两镜头构建了多光幕交汇测量弹丸坐标模型,采用高响应、低噪声阵列长条形光电探测器件,简化天幕靶结构设计,改善天幕靶探测性能.结合多光幕交汇测量系统数学模型,应用微分法分析了测量系统误差.靶场实弹试验结果表明,设计的2种新型天幕靶可以实现飞行弹丸坐标的测量,在高空大靶面条件下,坐标测量误差小于20 mm.     

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.     

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.     

Experimental Research on Output Performances of Giant Magnetostrictive Actuator

The paper introduces the performances of magnetostrictive actuators and its applications, discusses the design methods for the structure and internal magnetic circuit of a giant magnetostrictive actuator, and makes tests on the output displacement and force characteristics for an actuator using homemade magnetostrictive material. The experimental result shows that the actuator has satisfactory output precisions and ranges in transient and stable states, and can be used in lowfrequency vibration control system of precise equipment.     

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.