基于AHP的目标识别模糊评判模型研究

首先介绍了目标属性识别的方法及模糊综合评判原理,在分析影响目标属性识别因素的基础上,采用AHP 法确定属性权重集,再通过模糊数学的方法建立了目标属性识别的多级模糊综合评判模型。该模型兼具两种方法的优点,且简便易行,可尝试解决防空作战中目标属性识别问题。     

目标的火力突击必要性分析

为了确定目标的火力突击必要性,利用定量分析的方法对已构建了目标价值评价的指标体系进行分析,具体步骤包括：选取被评判对象的因素集与评语集,然后利用打分的方法进行单因素评价,导出模糊关系,最后进行综合评判。实例证明该模型科学可行。     

装备采购项目效益评价指标体系及模型构建研究

针对型号装备采购项目,建立效益评价指标体系。选用模糊综合评判的方法评价装备采购项目效益,包括通过确定评语集、评价因素集、评价因素的权重、模糊矩阵构建模型,以及按照最大隶属度原则,对装备采购项目效益进行综合评价。     

伞弹系统落点散布影响因素分析

根据伞弹系统弹道飞行特征对伞弹弹道模型进行了简化,提出了弹道和落点分析计算模型。根据该模型对影响弹道落点的因素进行了分析,得出了各因素导致的落点散布影响范围和敏感程度。认为载机偏角、载机倾角、机弹侧向分离速度、伞弹自身因素散布和风偏对弹体落点散布的影响较明显,是导致弹体落点散布的敏感因素,并通过计算得到了弹体落点综合散布范围。     

近距格斗导弹发射分离安全分析

载机在大机动条件下发射近距格斗导弹的安全性是导弹发射系统研制中的重要问题。基于近距离格斗导弹发射系统,分析了导弹发射时影响载机安全的主要因素;建立了导弹在轨上运动和自主飞行2个阶段的运动学、动力学模型;通过对导弹气动特性、轨上运动、自主飞行和起控时间的仿真分析,提出了载机机动发射近距离格斗导弹的基本条件,以及载机安全发射近距格斗导弹应采取的措施。     

弹药试验风险因素分析

为提高弹药试验风险管理水平,确保试验质量目标实现;从弹药试验基本过程的角度对弹药试验风险因素进行了识别;假设了47个弹药试验的潜在风险因素,识别出具有回归显著性的6个风险因子,33个风险变量,构建了导致弹药试验风险后果发生的关键风险因素集.     

模糊综合评判的空袭目标选择

在对空袭目标选择依据阐述基础上,建立选择空袭目标的指标体系,并运用现代数学理论对空袭目标选择作定量分析。其步骤包括:确定目标评价的指标体系、选取被评判对象的因素集与决断集、对因素集进行层次划分、进行一级模糊综合评判、进行二级综合评判。模型的应用证明该方法可行。     

基于UKF航迹滤波的干扰目标智能识别算法研究

针对雷达导引头末制导阶段抗干扰技术,建立了典型的距离-速度拖引干扰模型,采用无迹卡尔曼滤波(UKF),研究了基于速度、加速度、过载等指标的干扰目标智能识别技术。首先建立距离-速度拖引干扰模型,通过引入弹目相对距离、径向速度、高低角与方位角建立了系统跟踪模型。其次,给出了基于UKF实现目标跟踪与识别的滤波框架。在此基础上,以径向速度、径向加速度、角加速度与过载为评价指标,建立了目标智能识别指标体系。最后,通过典型的目标运动模型(目标跃升),对目标施加的四次距离-速度拖引干扰(两次前拖、两次后拖)进行目标识别。仿真结果表明,利用UKF滤波信息能够有效实现对距离-速度拖引干扰下的干扰和目标智能识别,仿真结果验证了该识别方法的可行性与有效性。     

图像末制导空对面导弹图像传输信道模型研究

针对图像末制导空对面导弹回传载机的目标信息图像存在马赛克(或停顿)等问题,以无线信道多径干扰为切入点,设计了一种基于图像末制导空对面导弹图像传输信道模型,分析了该模型的参数组成,并给出了误码率性能和图像传输质量的仿真结果。仿真结果表明,所提出的模型反映了弹载图像传输信道多径干扰特性,验证了多径干扰是造成载机接收图像质量退化的主要因素,可对同类型图像传输系统研制提供参考。     

弹射式导弹发射对超音速飞行载机的动力学影响

在载机超音速飞行发射导弹时载机通过弹射装置施加在导弹上的弹射力大且作用时间短,对载机的扰动较大,会影响到载机和导弹的安全分离.为了研究该扰动下载机的动力学响应,建立了载机的作超音速自然飞行的动力学模型,并验证了该模型的合理有效性,同时设计了一套弹射式发射架.研究结果表明弹射力对载机的运动有一定影响,但是对导弹的出舱速度影响显著,载机对弹射架位置的变化动力学响应明显,多刚体的弹射系统能够按要求发射导弹.     

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.