坦克悬挂系统杆机构的优化设计

该文在运动学分析研究的基础上,运用现代优化理论和计算机对悬挂系统杆机构的方案进行优选设计,使得众多的参数达到最佳配合,从而改善坦克悬挂系统的阻尼特性。通过对中型坦克悬挂系统进行分析研究表明,运用本设计原理和方法对其进行改进设计,进而使整车性能得到改善。     

小波信号处理的xPC实时仿真系统设计

针对某随动稳定系统在调试过程中出现的失稳现象,设计了xPC环境下的CAN总线驱动模块,构建了基于xPC的实时仿真系统。对随动稳定系统的陀螺输出信号进行实时测试和记录。针对实测陀螺信号的非平稳特性,使用S函数完成小波去噪算法建模,设计了实时仿真控制系统的Simulink模型,对实测陀螺信号进行了实时小波去噪仿真分析。工程实践表明,实时小波算法对陀螺速率信号具有良好的去噪效果,该方法对随动稳定系统的调试和设计起到重要作用。     

采用弹体追踪导引律的旋转弹锥形运动稳定性

针对旋转弹采用捷联导引头和弹体追踪导引律时可能导致锥形运动失稳的问题，推导了捷联导引头在非旋转弹体坐标系下的动力学模型，建立了复数形式的弹体追踪制导控制系统数学模型；在不同弹体转速及阻尼回路增益情况下，分别考虑导引头响应延迟和陀螺标度因数误差，分析了上述制导控制系统的稳定性，并使用数值方法求得使其稳定的特征参数取值范围。研究结果表明：导引头延迟角越大，使系统稳定的制导回路增益上限越小；陀螺标度因数误差系数大于1时，使系统稳定的制导回路增益上限会变大，当陀螺标度因数误差系数小于1时，使系统稳定的制导回路增益稳定上限会变小。     

力反馈陀螺解调线路设计

自动驾驶仪采用速率陀螺作为角速率敏感元件，该速率陀螺方案通过速率积分陀螺仪和力反馈回路实现。介绍了力反馈回路及采样电路的设计，对其中各个环节进行了分析。     

多级阻尼可调减振器的模糊控制研究

作者提出了一种新的多级阻尼可调减振器的设计方法，并将其应用到车辆半主动悬挂系统之中，利用模糊控制规则动态调节减振器的离散阻尼系数。在液压振动实验台上进行了1DOF半主动悬挂实验模型控制实验，结果表明了该减振器能有效地衰减系统振动，大大提高了悬挂住能。该文对此项研究作了介绍。     

捷联导引头寄生回路分析及其品质测试研究

为研究隔离度寄生回路对捷联图像导引头的影响,建立了捷联导引头隔离度寄生回路模型。通过无量纲化后得到无量纲特征方程,利用劳斯判据研究了制导参数、陀螺和探测器的刻度尺偏差和动力学偏差对稳定域的影响,并分析寄生回路对制导动力学的影响,建立非线性仿真模型;利用蒙特卡洛法研究脱靶量随刻度尺偏差和动力学偏差的变化规律,建立了半实物开环仿真测试系统,对隔离度寄生回路品质进行了评价。研究结果表明：角速率陀螺与探测器之间的刻度尺误差和动力学不匹配是引起隔离寄生回路的主要因素,其差值的正负分别代表隔离度寄生回路反馈的正负特性;正反馈的稳定域要远小于负反馈的稳定域,并且脱靶量对制导系统偏差的敏感度更大;为了提高系统阻尼,提高导弹末制导精度,需采用五轴转台半实物仿真测试系统对隔离度寄生回路的阻尼特性进行测试标定,或者消除刻度尺误差,完成动力学匹配,进而消除寄生回路的影响,或者构造负反馈寄生回路以减弱其影响。     

基于固体燃气姿控舵机的自振荡阻尼回路设计

为了描述自振荡阻尼回路的设计方法,以某小型战术导弹为例,设计了基于固体燃气姿控舵机的自振荡阻尼回路原理,详细描述了阻尼回路校正网络参数设计方法和设计过程,并对阻尼回路进行了仿真验证,结果表明参数设计正确,满足要求。     

空空导弹光纤陀螺带宽特性研究

带宽是空空导弹IMU的重要指标之一。本文针对空空导弹光纤陀螺动态特征中的带宽特性进行了研究。分析了闭环数字光纤陀螺的带宽特性,以及导航回路、制导回路和稳定回路对带宽的需求,指出导航回路和制导回路要求带宽较高,而稳定回路要求带宽不宜过高。提出了一种工程化的光纤陀螺带宽测试方法,并完成某型空空导弹光纤陀螺带宽测试。     

一类滚转弹的补偿解耦方法

由滚转产生的舵机空间耦合传递函数得出控制力矩偏转角;按动态特性差异分别分析了马格努斯力矩、陀螺力矩,得出了弹体稳态情况下的响应力矩角偏差,对控制力矩偏转角度进行了指令补偿解耦,可以获得期望的控制效果.研究表明,引入阻尼回路补偿可以大大削弱陀螺效应产生的快速振荡现象,结合稳态解耦方法可以达到较好的控制精度.     

末制导炮弹导引头陀螺随动跟踪装置动力学特性的分析

依据末制导炮弹导引头陀螺随动跟踪装置的结构及工作原理,利用欧拉直角坐标系及其各坐标系的转换关系,建立末制导炮弹导引头陀螺随动跟踪装置动力学方程,并对陀螺随动跟踪装置所受到的外力矩进行了分析讨论.在小扰动稳态跟踪假设基础上,得到简化的动力学方程,推导出陀螺随动跟踪装置固有运动的稳定性判据及受迫运动的解析解.目的是为末制导炮弹引头的数学仿真及半实物仿真提供理论基础.     

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.