MEMS-SINS/GPS的组合导航在弹道修正中的应用研究

弹道修正技术能以较低成本显著提高现有武器系统的作战性能.主要研究基于低成本MEMS的组合导航系统在弹道修正方面的应用,建立了组合导航系统的速度、位置组合模型,采用了卡尔曼滤波技术对该组合导航系统进行最优估计,分别对纯惯导系统和组合系统进行了仿真分析,并对组合导航系统进行跑车试验验证.仿真与跑车试验结果表明,该组合导航系统能提供较高精度的位置和速度信息,进而为弹道修正控制机构提供精确的测量信息,从而提高其射击精度.因此该研究具有一定的工程应用价值.     

基于多线阵电荷耦合器件的炮口测速系统

利用多个线阵CCD（Charge Coupled Device）组建成测量高速运动目标运动参数及记录运动姿态的系统，通过两两CCD进行组合可以测出多个速度值，并可以通过还原弹型图像的方法进行测时修正。对测试系统和测时仪进行了原理设计，举例进行了测速仿真，结果表明：本方法具有较高的测速精度。     

基于声卡的噪声仿真系统设计与实现

针对运载火箭地面综合试验中噪声参数测试精细化不足的问题,提出一种基于声卡的低成本噪声仿真系统设计方法.基于声卡的工作原理及性能指标,分析了利用声卡模拟噪声环境的可行性.采用虚拟仪器技术,设计了系统的硬件架构,并在LabVIEW平台下完成了噪声仿真软件的开发.测试结果表明:噪声仿真系统模拟发出的噪声信号与传感器所敏感到的噪声信号一致,工作性能稳定.该系统具有成本低、通用性强、操作简单等优点,目前已成功应用于运载火箭遥测系统综合试验的噪声参数测试.     

弹道修正引信脉冲修正参数研究

根据提高高射弹丸对机动目标命中率的实际需求,研究了空射型二维弹道修正引信。基于外弹道理论,结合脉冲发动机的工作特点,构建了两种外弹道模型。以高炮弹丸为例,利用六自由度弹道程序进行仿真,分析了修正距离与脉冲发动机的工作级数、修正时刻、修正角度等参数的关系,通过仿真得到了各参数与修正距离关系的拟合模型,该模型为脉冲修正机构的设计提供了理论基础。     

基于压电陶瓷材料的外弹道修正技术研究

针对高速旋转弹丸的弹道修正，文中采用了一种基于压电陶瓷材料的弹头修正机构，阐述了该机构的工作原理，建立了修正机构工作后的外弹道数学模型并对其进行了仿真，得出该修正机构能对弹丸外弹道进行有效修正。     

鸭式布局防空炮弹的鸭舵设计优化

为提高防空有控炮弹的弹道性能,以一对鸭舵控制的防空弹道修正弹为对象,阐述了系统工作原理与鸭舵控制方式,在全指令控制信号及弹体稳态飞行条件下,研究了由鸭舵偏转产生的弹道法向修正速度,给出了精度较好的估算公式。由此提出一个以鸭舵气动外形参数为设计变量的弹道修正能力综合优化设计模型,并进行了数值仿真。仿真结果表明,采用该模型对鸭舵气动外形参数进行综合优化设计,能够有效提高鸭式布局防空炮弹的弹道控制能力,为该类有控炮弹的鸭舵气动外形参数设计提供了参考。     

基于多目标遗传算法的高速履带车辆动力学模型参数修正研究

为了提高高速履带车辆多体动力学模型仿真结果的准确度,对模型参数修正方法进行了研究。建立了高速履带车辆多体动力学模型,根据其行驶工况统计规律,选择水泥路和砂石路作为参数修正的行驶路面条件。对比分析了模型参数修正前的仿真结果与实车测试结果,并给出了修正目标函数的表达式。通过正交实验设计筛选出对目标函数影响较大的待修正模型参数。为了解决修正效率低、计算量大的问题,建立了修正参数与目标函数之间关系的径向基神经网络近似模型。通过分析目标函数随修正参数的变化规律,采用多目标遗传算法NSGA-Ⅱ对两种工况条件下的模型参数同时进行修正,并确定了最终解。研究结果表明,动力学模型仿真结果的准确度得到了提高,证明该修正方法的有效性。     

编队作战指挥信息系统半实物仿真测试平台构建

构建了编队作战指挥信息系统半实物仿真测试平台,该仿真平台主要包括地理信息系统、系统精确对时、模拟目标运动模型、数据记录与回放以及系统评估模型等模块组成。并提出了编队作战指挥信息系统半实物仿真测试平台的评估指标体系。     

鱼雷发射装置内弹道参数测试

本文以光线记录测试系统的测量原理特点，传感器与记录光点的标定以及各待测参数之特征，系统地阐述了鱼雷发射装置内弹道参数的基本测试方法。尤其是对发射管膛压的测量，钱雷在发射管内运动速度、加速度的测量和如何正确选用记录振子的性能指标作了重点介绍。阐明了鱼雷发射装置内弹道待测参数、测试仪器和测试方法这三者的紧密关系。     

基于ADAMS的某自动机加速机构动力学仿真

提出了一种自动机加速机构,用于自动武器在研发过程中的非射击系统联调。基于多刚体动力学理论,运用SolidWorks和ADAMS软件联合建立了虚拟样机模型。采用ADAMS软件作为仿真平台,针对该加速机构的工作原理与结构特点建立仿真策略并进行了仿真计算与分析,确定了主要的结构参数和电机转速,并获得了自动机的模拟加速曲线,实现了预期的设计目标,验证了该加速机构的可行性与合理性。     

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.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

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.