软件无线电引信的实现方法及关键技术

介绍软件无线电引信的概念及优越性，分析基于软件无线电的导弹引信的特点与结构模型，并根据现有条件提出一种软件无线电引信中频数字化实现方案，最后讨论其关键技术及对策。     

基于软件无线电的导弹无线电引信研究

介绍了导弹软件无线电引信的概念及优越性，分析了导弹软件无线电引信的特点与结构模型，提出了一种导弹软件无线电引信的中频数字化实现方案，最后讨论了其关键技术以及根据现有条件的实现方法．     

利用软件无线电提高导弹引信的抗干扰能力

根据软件无线电的功能和特点,探讨了对于提高导弹无线电引信抗干扰能力的重要作用,阐述了软件无线电引信的概念及其优越性.在现有器件的水平上,研究了一种基于中频数字化的设计方案,讨论了正交调制中的基带信号产生算法,分析了实现软件无线电引信的关键技术.     

基于LabVIEW的无线电引信目标检测算法仿真验证

为了验证无线电引信信号处理方案,文章在LabVIEW编程环境下根据无线电引信目标检测算法,编写了数字化目标检测仿真软件。通过对引信回波数据的分析,对检测算法作了进一步的完善,验证了无线电引信信号处理算法的可行性,可以看出系统具有较好的检测性能。     

基于软件无线电技术的数字化引信研究

介绍了一种基于软件无线电技术体系结构设计的全数字化引信。在脉冲多普勒数字化引信的基础上,详细设计了可编程脉冲发生器、数字化接收机和数字信号处理机。该数字化引信具有通用性和可扩展性的特点,提高了无线电引信的自适应能力和智能化水平。     

频率捷变引信的研究

根据现代无线电引信的特点和发展趋势，借鉴频率捷变技术在雷达，通信等领域中的应用，提出适用于对地常规兵器的频率捷变引信方案，分析了方案的一些性能，为今后研制捷率捷变引信提供参考。     

智能卡技术在引信遥控装定装置中的应用研究

分析了智能卡技术,提出了将智能卡技术应用于无线电引信装定装置的设计思想,并设计了具体方案.该方案能够实现引信远距离接电装置时间装定的遥控操作及数字化.     

频率伪随机捷变引信信号分析

根据频率捷变技术在无线电引信中的应用特点，分析了无线电引信发射频率伪随机捷变引信的信号特征，研究了其模糊函数和信号所携带的目标信息，指出提高无线电引信系统性能的技术途径，为频率捷变引信各种技术方案提供指导。     

国外导弹无线电近炸引信追踪

简述了无线电近炸引信的发展历史和研究工作现状，将一些采用无线电近炸引信的空对空导弹、地对空导弹进行列表。举例对“天空闪光”空对空导弹，“海响尾蛇”舰对空等导弹的引信进行了简单的分析，比较了红外光学近炸引信与无线电近炸引信的优点和缺点，同时探讨了今后无线电近炸引信的发展方向。     

一种无线电引信杆试验升降装置

针对目前广泛使用的无线电引信杆试验升降装置的不足，提供一种先进，简单，实用的升降装置，此装置主要由一体化减速，制动电机和控制电路组成，具有体积小，可靠性高，成本低廉等优点，是解决无线电引信杆试验测试弹升降问题的较好方案。     

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.