俄罗斯导弹天线罩研制情况介绍-赴俄罗斯考察报告

介绍了国外在导弹天线罩研制方面的一些情况,并与国内在天线罩研制方面的工作进行了一些对比。     

谈谈天线罩透波壁的理论厚度和结构厚度

以飞航导弹天线罩夹层结构透波壁厚度设计为例,阐述了“有效厚度”与“结构厚度”两个重要概念及彼此间的区别与联系,并指出在具体设计中透波材料介电性能数据的重要性,及泡沫塑料介电常数随密度变化的规律及估算方法。     

低误差斜率导弹天线罩的设计与制造

采用常规设计的导弹天线罩一般有着较大的瞄准误差斜率,难以满足先进的导弹系统要求.在天线罩的研制实践中,开发了一套误差斜率修磨调整技术,可以显著降低天线罩的瞄准误差斜率.叙述了这种技术的原理与使用步骤,重点介绍了为减小天线罩误差斜率所完成的一系列研究工作和取得的成果.     

高超音速导弹天线罩关键技术

天线罩技术是高超音速导弹的关键技术之一,直接制约着先进导弹型号的发展.介绍了导弹天线罩的研究历史和现状;综述了高超音速导弹天线罩的关键技术,包括总体设计、材料设计、工艺与加工、检测技术、试验技术、多模制导技术;指出了高超音速导弹天线罩技术的发展方向.     

透波介质材料的介电性能及测试方法

介绍了天线罩透波介质材料的介电性能及要求,分析了矢量网络分析仪的测试原理,详细介绍了透波介质材料电性能的常用测试方法。根据各种方法的优缺点及适用条件选择合理的测试方法,对透波介质材料的介电性能做出精确的评价。     

空空导弹天线罩发展展望

战术空空导弹的迅速发展,对作为其重要部件的导弹天线罩提出了一系列新的需求和挑战,同时,也带动了导弹天线罩不断地寻求新的技术途径和突破。本文在分析这种需求和应用背景的基础上,重点概述近几年来国外加紧开发的毫米波导弹天线罩、超宽带导弹天线罩、红外/射频或红外/毫米波双模或多模导弹天线罩,介绍了某些有着潜在应用前景的新材料、新技术,从而引起对空空导弹天线罩未来发展动向的思考。     

导弹天线罩的结构可靠性

分析了导弹天线罩的结构特点、飞行过程中的受力情况,总结了导弹天线罩结构可靠性的失效模式,介绍了天线罩的结构可靠性设计、生产控制和试验验证项目。     

导弹雷达天线罩用的工艺材料

介绍了导弹雷达天线罩材料性能和工艺要求，并综述了导弹雷达天线罩的材料和工艺研究进展。     

导弹天线罩的制造技术

导弹由天线罩、导引头、控制装置，战斗部和发动机等组成，导弹的最前端是流线形状的天线罩，介绍了天线罩所要求的性能，天线罩所用的材料以及天线罩的成型方法等。     

寻的导弹制导系统天线罩/导引头数学模型分析

本文从系统设计的角度描述了寻的导弹雷达导引头天线罩瞄准误差的数学模型;结合导引头分系统的数学模型,分析了天线罩瞄准误差对系统制导精度的影响及其引出的有害反馈——导弹姿态角速度耦合效应,基于系统的简化方框图及其线性描述,讨论了瞄准误差本身的取值范围和与系统几个主要参数之间的关系。最后简略地介绍了补偿天线罩瞄准误差的两种可能途径。     

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.