一种新的激光陀螺捷联惯导系统的误差参数标定方法

为了提高激光陀螺捷联惯性导航系统的导航精度，对惯性器件误差进行了原理上的分析和说明，并针对由国内某型激光陀螺构成的惯性测量器件进行了误差分析。在此基础上建立了精确的误差模型，并采用多位置标定法标定出了加速度计的误差系数，采用分立标定法标定出了陀螺的误差系数。     

中低精度捷联惯测装置的不开箱标定方法研究

针对中低精度捷联惯测装置，提出了一种实用的不开箱条件下的标定方法。该方法不需要大型精密测试转台，而是用一套精度较高的惯测装置来标定低精度的惯测装置。文中给出了一套六位置测试方法。理论分析表明，该方法通过最小二乘法能有效地分离陀螺和加速度计的各项误差。     

中高精度捷联惯导系统的无转台标定

阐述了一种无转台标定中高精度惯导系统的方法,依据正交轴上加速度计输出矢量和等于重力的原理,标定出加速度计输出模型中相关参数。对于陀螺参数的标定,先通过翻转法得到陀螺标度因数的粗略值,再通过观测导航系统速度误差,求出陀螺相关安装误差并修正陀螺标度因数,最后根据静止时陀螺输出矢量相对关系得到陀螺零位。仿真和实际试验验证了这种标定方法的可行性。     

方位捷联平台惯导系统简化标定技术研究

论述了方位捷联平台惯导系统装备部队后定期进行标定的必要性，提出了一种加速度计、方位速率陀螺的简化标定方法。该方案中不用拆装平台的伺服电路，操作简单易行，适于部队战士使用。标定验证试验表明所提方法具有很高的标定精度。     

基于比对的捷联惯性测量组合不拆弹标定方法

安装在导弹中的捷联惯性测量组合(简称SIMU)随着时间推移陀螺和加速度计误差参数会发生变化,从而导致性能降低。针对拆弹标定工作量大、成本高的问题,提出一种工程上简单实用的不拆弹状态下对捷联惯性测量组合进行误差标定的方法。该方法将高精度捷联惯性导航系统固连在待标定弹上,作为基准,采用类似传递对准的方法,利用大维数卡尔曼滤波对陀螺和加速度计的各项误差进行估计。试验结果表明:该方法能够使SIMU的精度提高到陀螺误差小于6.0(°)/h,加速度计误差小于1 000μg,具有较高的工程实用价值。     

一种新的激光陀螺捷联惯导系统的误差参数标定方法

为了提高激光陀螺捷联惯性导航系统的导航精度,对惯性器件误差进行了原理上的分析和说明,并针对由国内某型激光陀螺构成的惯性测量器件进行了误差分析.在此基础上建立了精确的误差模型,并采用多位置标定法标定出了加速度计的误差系数,采用分立标定法标定出了陀螺的误差系数.     

双轴旋转激光捷联惯导系统在线标定技术

激光捷联惯导系统中陀螺和加速度计误差是影响系统导航精度的关键因素,结合双轴旋转激光捷联惯导系统自身的结构特点,提出了一种以速度误差和位置误差作为量测信息的双轴旋转激光捷联惯导系统在线标定方法,该方法可以在静态及行进等不同状态下完成在线标定。车载试验结果表明,在外场没有试验室标定设备如标定平板、高精度转台的条件下,按文中设计的标定路径及标定方法,可以准确估计出激光陀螺和加速度计的各项误差参数。该标定方法对标定环境、标定设备要求较低,且方法原理简单、易于实现。     

惯性测量组合射前动态标定误差分析

论述了为延长惯性测量组合的稳定期以及提高短程导弹的命中精度，在导弹临发射前对惯性测量组合影响射击精度大的不稳定参数进行自标定的技术。讨论了在导弹起竖过程中利用加速度计信息标定陀螺不稳定参数的方法。不仅从理论上探讨了射前动态标定方法，而且对射前动态标定存在的主要误差项进行了定量分析，并指出了影响射前动态标定的主要问题。根据对实验结果分析，提出了解决动态标定的关键性问题的方法。     

中低精度捷联惯测装置的不开箱标定方法研究

针对中低精度捷联惯测装置,提出了一种实用的不开箱条件下的标定方法.该方法不需要大型精密测试转台,而是用一套精度较高的惯测装置来标定低精度的惯测装置.文中给出了一套六位置测试方法.理论分析表明,该方法通过最小二乘法能有效地分离陀螺和加速度计的各项误差.     

一种激光陀螺捷联惯性导航系统级标定方法

为优化激光捷联惯性导航在卧式三轴转台上的系统级标定方案,设计了卧式三轴转台外环轴整周旋转对惯性测量单元（IMU）误差参数的激励方法。基于捷联惯性导航的误差方程,阐述了速度误差与IMU误差参数间的关系,从而建立IMU系统级标定模型。该模型具有加速度计误差参数仅反应在观测量北向分量、陀螺误差参数仅反应在观测量东向分量的特点,消除了加速度计和陀螺误差参数标定误差的相互影响。根据准D最优准则,设计了正二十面体12点计划的双轴位置单轴速率翻滚法,利用最小二乘法辨识出IMU的24项误差参数。通过给加速度计和陀螺加入不同测量噪声,对IMU标定模型进行仿真,结果表明该方法可抑制加速度计和陀螺的测量噪声对标定结果的影响。     

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.     

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.     

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.     

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。     

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.     

Design and Implementation of One Missile Visual Simulation System Based on OpenGL

The implementation of a missile＇s visual simulation system is explained that is developed with OpenGL（open graphic library） and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile＇s data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.     

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.     

Dynamic Encryption Technology in Ad-hoc Networks

A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.     

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.