火炮典型故障测试与预测技术研究

从任务成功性的角度设计和实现了火炮故障测试与预测系统。提出了火炮性能测试评估指标体系,以可测性较好的参数作为底层指标。以某型大口径火炮的发射过程为研究对象,对复进机漏液与复进不足的影响规律进行了仿真。针对传统模糊综合评判方法存在的不足,提出了动态隶属度的概念,阐述了基于动态模糊逻辑的预测推理机制,并基于仿真结果确定隶属函数,有效地提高了故障预测结果的准确性。     

基于虚拟样机的火炮故障仿真预测系统研究

根据故障仿真预测任务的要求，利用动态模糊综合评判和虚拟样机建立了一种新的故障仿真预测模型，首先利用动态模糊综合评判方法预测各故障现象出现的可能性大小，由基于ADAMS(Automatic Dynamic Analysis Mechanical System）建立的虚拟样机结合专家知识库进一步检验实际发生故障的部件。这种定性与定量推理相结合的故障仿真预测模型不仅具备较强的数值计算能力，还能有效地表达专家的经验知识，利用已有的实验数据，对自行火炮在未来任务段内的故障发生情况作出准确的预测。     

火炮预知维修专家系统中的预测推理机制

火炮故障预测技术以当前火炮使用状态为起点,对火炮在未来任务段内可能出现故障进行预测.系统分为数据采集/处理、故障预测及性能评估、维修决测四个层次.该过程涉及:预测模型的建立、预测知识的表示、基于"框架 规则"的反向推理三部分.     

基于模糊层次评判的火炮测试性分级评估

针对用故障总检测率评估火炮测试系统测试性不完备的问题,提出了基于模糊层次评判的火炮测试性分级评估模型。在对某火炮火力系统常见故障进行故障模式分析的基础上,将层次分析法和模糊综合评判的方法应用到分级评估中,实现了对某火炮火力系统的故障测试项目进行一级测试、二级测试、综合测试和工厂测试的归类;通过与某火炮火控系统分级测试分级结果的对比,验证了指标体系和方法的有效性和适用性。     

自行火炮故障预测的新方法

针对自行火炮在服役过程中的动态特性,分析了传统故障预测方法普遍存在精度不高的问题,基于动态模糊综合评判和多Agent并行诊断结构,提出了一种自行火炮故障预测的新方法,并给出了该方法的预测流程和工作原理。     

基于模糊评判的装备故障预测模型研究

为了对装备故障实现适时预测 ,本文以模糊综合评判理论为基础 ,提出了一种动态的故障预测模型 ,并探讨了动态模糊关系矩阵的确定方法 ,最后进行了实例分析。     

基于模糊证判的装备故障预测模型研究

为了对装备故障实现适时预测,本文以模糊综合评判理论为基础,提出了一种动态的故障预测模型,并探讨了动态模糊关系矩阵的确定方法,最后进行了实例分析。     

炮闩系统故障仿真预测系统研究

根据炮闩系统结构的特殊性，首次提出基于虚拟样机和故障预测专家系统的故障仿真预测模型的建模方法和设计思想，基于多体力学理论，采用ADAMS软件平台建立了炮闩系统的虚拟样机，根据系统的动态权重系数集和动态模糊关系矩阵，按照建立的动态模糊综合评判模型可以得到系统可能出现的故障，由预测结果调用知识库中的诊断知识产生实际发生的故障部件。这样建立的仿真模型将虚拟样机和专家系统结合在一起，从定性和定量两个方面表达各部件的动态属性，行为特性，有效地对炮闩系统的故障机理进行仿真研究。     

基于模糊评判的装备故障预测专家系统研究

根据故障预测系统的特点,应用模糊综合评判原理,针对某武器装备建立了一种故障预测专家系统.介绍了系统推理运算模型,算法的实现及推理机制的运行,最后进行了实例分析.     

装备故障模糊预测系统初探

为了改善装备的质量监控技术水平 ,通过分析装备故障模糊预测系统的要求 ,应用模糊数学理论 ,提出了构造基于模糊综合评判的故障预测大系统的设想 ,并探讨了模糊推理机的运算模型及设计方法。     

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.