主动雷达导引头屋顶试验和高架试验系统

介绍了主动雷达导引头的两种试验方法：屋顶模拟试验和高架演示试验，屋顶模拟试验是主动雷达导引头与模拟信号源对接试验，用来考核主动雷达导引头在全功率辐射条件下的技术性能，高架演示试验是主动雷达导引头和实际目标的联合试验，用来检验主动雷达导引头的探测跟踪能力。     

主动雷达导引头海杂波回波信号计算与测试

采用复合制导体制的防空导弹,在其末制导阶段下视攻击低空目标时,主动雷达导引头会接收到较强的地/海杂波,此时进入接收机的杂波信号会严重影响导引头目标的检测和分析。因此,关于杂波的精确计算对评估导引头在杂波下的截获和跟踪能力具有至关重要的意义。本文将主动雷达导引头的试验数据与海杂波理论模型相结合,提出了一种实时计算海杂波回波信号强度的方法。该方法在杂波理论模型的基础上,通过引入试验数据为算法提供标定基准,能够保证海杂波计算结果更加符合实测结果。仿真结果验证了该方法的有效性和可行性。     

双模导引头高度定位系统的研究与实现

飞行高度精确测控是双模导引头执行目标指示、航姿遥测的主要实施单元.针对传统高度测量方法的缺陷和导引头趋于小型化、智能化、标准化的要求,设计并实现了一种具有大气压采集、温度补偿、大气压高度转换与经纬度信息实时同步的高度定位系统,其大气压高度转换率高、输出数据可靠稳定.经过外场飞控综合性能测试和模拟打靶功效测试验证,表明高度定位系统测量数据精准度和实时性满足导引头研发需求.     

被动声定位系统的计算机仿真

讨论了声探测引信跟踪定位系统的工作原理。设计了对系统进行仿真的方法，给出随机噪声产生的方法。验证了系统中传声器阵列布阵方法，时延估计的精度，定位算法和卡尔曼滤波器的精度、统计试验表明，该系统能够给出满意的目标坐标，并能够跟上目标的机动。     

联合通用导弹成功捕获和跟踪战术近海目标

日前，洛马公司验证了其联合通用导弹(JCM)三模导引头的成熟性，在位于佛罗里达州进行的一系列试验中，该导弹成功地捕获和跟踪了一个战术近海目标。在125次试验过程中，导引头捕获并跟踪了一艘以30n mile／h的速度在1km-6km外行进的Boghammer巡逻艇，该艇是有可能活动在敌沿海水域的典型巡逻艇。这些试验验证了由导弹的3种导引头中的两种进行同时探测和处理的情况，     

被动声定位系统的计算机仿真

讨论了声探测引信跟踪定位系统的工作原理，设计了对系统进行仿真的方法，给出随机噪声产生的方法，验证了系统中传器阵列布阵方法，对延估计的精度，定位算法和卡尔曼滤波的精度，统计试验表明，该系统能够给出满足的目标坐标，并能够跟上目标的机动。     

机载雷达测角精度试验方法研究

机载雷达在火控系统中主要来用来搜索和发现目标，并进行跟踪测量，将测得的目标参数（Ｄ、Ｄ、β、β、ε、ε）实时传送给火控系统，以控制武器发射、制导和准确命中目标。因此，机载雷达测量精度对整个火控系统精度和武器的命中概率有着重要影响，如何通过测量观察值评估机载雷达精度就成了一个重要课题。本文主要对机载雷达测角精度试验方法和精度进行研究和分析。     

一种结合外场试验与仿真的电子干扰效果评估方法

为检验、评估电子对抗装备对导弹的干扰效果,提出了一种结合导引头外场挂飞干扰试验和导弹飞行仿真的方法.该方法基于导引头挂飞干扰试验实测数据建立导引头电子干扰效应模型,再结合导弹数字仿真系统,通过在干扰条件下重复进行大量导弹飞行仿真试验来评估导弹电子干扰效果.以烟幕对电视制导导弹干扰效果的试验评估为例,演示、验证了方法的可行性.结果表明,该方法具有简便易行、评估结果可信、效费比高的特点.     

基于数据融合提高红外/毫米波复合导引头跟踪精度的新算法

制导精度是衡量寻的制导武器性能的一项重要指标。导引头对目标的跟踪精度是制约制导精度的主要因素之一。影响导引头跟踪精度的主要因素是IR／MMW误差测量元件的精度。本文从误差测量环节入手，基于IR/MMW双模结构，采用信息融合处理技术提高其估计精度，最终达到降低制导误差，提高武器性能之目的。仿真结果验证了该方法的有效性。     

导引头自适应导弹自旋方法研究

导弹弹体转速变化范围较大,会给导引头有效跟踪目标带来困难.为消除弹体转速变化对导引头跟踪目标的影响,文中提出一种导引头自适应弹体转速的设计方法.这种设计方法不但可以在弹体转速变化的情况下实时提供正确的目标方位信息,而且可以有效提高导引头的进动效率,实现导引头在自旋弹体下消除转速变化对其影响,达到导引头精确跟踪目标,保证导弹命中精度的目的.     

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.     

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.     

A Study on the Estimation of Aeroheating upon the Warhead Nose at Supersonic Speed

An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD （computational fluid dynamics） and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.     

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.