开展水中兵器保障性试验的几点思考

保障性试验是装备试验的重要组成部分,是实现装备综合保障目标重要而有效的决策手段。通过对保障性指标要求的分析和设计定型阶段保障性试验开展情况的总结,初步分析了目前保障性试验中存在的不足,并对开展好设计定型阶段装备保障性试验提出了几点建议。     

装备使用保障性评价参数体系

针对目前使用保障性度量参数未对使用保障性度量参数进行系统研究的问题,建立一套定性与定量相结合的军用飞机使用保障性参数体系。以军用飞机为主要研究对象,概括归纳装备使用保障性的内涵,运用系统工程理论,同时对装备系统使用保障性综合要求、装备本身的使用保障特性要求、装备保障系统的使用保障特性3个方面进行研究,给出了定量参数的解析算法,并以舰载机为例给出了案例分析。分析结果证明:该体系作为综合保障工程的必要补充,为装备研制阶段并行开展使用保障系统的设计提供了技术支持和理论依据。     

浅析战术导弹作战技术准备保障性

针对战术导弹作战技术准备保障现状进行了分析, 从体系建设出发, 分析了作战技术准备保障体系构成要素:技术阵地建设保障、测试性保障、维修保障以及综合保障, 并对各个构成要素进行分析研究, 提出了提高保障性可以采取的策略和需要研究的方向.     

保障性分析在装备寿命周期过程中的应用

分析了保障性概念及保障性与可靠性、维修性之间的关系,提出了保障性工程的基本定义、目标、任务和基本框架,给出了用于定性和定量分析的3类保障性参数,阐述了保障性分析在寿命周期过程中的五大项工程,研究了装备设计和保障资源的保障性分析过程与方法,构建了装备寿命周期不同阶段的保障性模型以检验保障性设计参数的合理性。     

装备保障性定量参数基本集合研究

装备保障性是一项涉及可靠性、维修性、测试性等的装备综合属性.由于装备的复杂性,其保障性要用多个或一组参数来表示,并且各参数之间还存在着主从层次和相互关系.根据保障性定义及参数分类,按照全系统、全过程、全特性的确定原则,确定了装备保障性定量参数的基本集合,并明确了每个参数的适用范围及验证时机,为装备保障性的设计、验证和评价等工作提了供依据.     

基于蒙特卡洛法的舰船装备完好性仿真

战备完好性仿真是优化装备设计过程、衡量装备综合保障工作的关键。文中利用Monte-Carlo抽样、离散事件仿真、数理统计、计算机仿真等理论建立了一种基于设备参数和使用规则的综合模型和算法。结果表明此模型不仅能定量权衡现役舰船装备综合保障工作的合理性，发现影响装备任务的关键设备，还可在论证初期规划系统的保障性设计。     

装备保障性验证研究现状

装备保障性是装备的设计特性和计划的保障资源满足平时战备和战时使用要求的能力,是与作战性能以及可靠性、维修性同等重要的装备战术技术性能。保障性验证是实现装备保障性目标的一种有效的监督和控制手段,是持续不断地提升装备保障性水平的重要驱动。从保障性验证管理工作、保障性参数体系、保障性验证技术、验证相关标准四个方面,分析和总结了美军的装备保障性验证研究的进展。     

综合保障工程数据标准化与实现

"战备完好性"和"保障性"是装备采办的2个主要目标,而综合保障工程是实现这2个目标的重要保证。介绍了综合保障设计与分析的基本内容、方法和美军综合保障工程领域的标准规范与软件实现,并结合我海军在综合保障工程领域存在的问题给出了若干建议。     

综合保障在潜射导弹武器系统中的应用

对综合保障系统在潜射导弹武器中应用的特点和存在的问题进行了全面分析,并对潜射导弹武器综合保障系统进行了设想,提出了保障体系的建立方法,即着眼部队实际,注重保障系统的实效性和全寿命、全系统性,全程开展保障性分析,优化保障方案,同时要紧跟导弹武器系统的使用,开展综合保障体系的评估工作.     

导弹武器装备备件需求量分析与计算方法

导弹武器装备综合保障性的重要参数包括战备完好性及备件保障率.根据备件寿命的分布类型,即可确定备件的计算模型.通过定义保障概率、装备中某零部件所需备件数量、装备中某零部件的机用件数、装备中某零部件失效率等参数,从而确定备件的需求数量.     

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.