ARM Linux在AT91RM9200平台上的移植

ARM Linux在AT91RM9200平台上的移植,步骤包括下载安装内核源码、建立交叉编译环境及以压缩或非压缩方式配置和编译内核.其文件系统的建立及程序开发均在宿主机上完成,再通过串口、网口或者JTAG口烧写至目标板.     

基于AT91RM9200的BootLoader分析与开发

利用U-BOOT软件源代码结构开发基于AT91RM9200的BootLoader，通过AT91Basic Boot Project代码初始化电源管理控制器、SDRAM、AT49BV1614A、各种堆栈、异常向量和最终的C程序变量，然后在基本的初始化结束后，进入main（ ）函数，实现BOOT程序的开发。     

无人驾驶飞行器控制系统半实物仿真平台数据通信

论述了某无人驾驶飞行器数字控制系统半实物仿真平台设计的原理和过程,对半实物仿真平台的数据通信问题进行了较为详细分析,对捷联惯导的内部工作原理以及数据传输的协议进行了阐述.采用RS232串口实现了仿真计算机与捷联惯导、弹载计算机与捷联惯导的数据通信,RS422模式与三轴数控转台通信;对串行接口通信中遇到的问题进行了分析,提出了解决的办法.     

基于GPRS的电力无线抄表及防盗系统

在深入分析国内外智能电量监测系统的基础上,采用具有A/D采集功能的MCU(12C5410AD)及人体感应入侵探测器,RS485,RS232C串口,GPRS模块.实现人体感应实时报警,电表数据读取功能.GPRS模块与控制器间的通信协议是AT命令集.该设计还涉及数据采集系统通讯协议、应用程序、服务器端界面设计等方面.     

基于AT91SAM9263的工业级的支持LCD／TFT液晶显示的ARM9核心模块

COM9263是一款基于ATMEL AT91SAM9263的核心模块。AT91SAM9263内置最新ARM926EJ-S arm内核，运行在200MHz时拥有220MIPS的运算性能，具有DSP扩展指令，JAVA硬件加速。     

基于WINCE的某型车载记录仪CAN通信模块的设计

为实现与某型武器系统的无缝集成,文中提出了基于WINCE的某型车载记录仪CAN通信模块的研究与设计。该模块具有抗干扰能力较强的硬件结构,移植了WINCE嵌入式实时操作系统,并提出采用WINCE事件响应机制方法,实现CAN模块高速、可靠通信。试验表明,该设计通用性好,鲁棒性高,已经成功应用于某型武器系统。     

基于LTC4000 的锂电池充电模块

为了达到高效、便捷、低成本的充电目的,设计一款基于LTC4000的锂电池充电模块。该模块以三阶段充电法为设计理念,硬件方面选用 MSP430系列单片机作为主控芯片,具有电压、电流调节模块实现稳定输出,软件方面通过MODBUS协议和RS485物理接口实现与上位机的通信,并制作PCB电路板对该模块进行验证。实验结果证明：该系统结构简单、携带方便、实用性强,上电后能迅速达到稳定状态,有广阔的市场前景。     

高可靠粮情监控系统

粮情监控系统是由中央控制站、通信控制器、现场测控单元等构成的分布式网络监控系统。中央控制站（PC微机）以主从式工作方式实现对128个现场测控单元的监控管理,并通过通信控制器RS232／485转换模块完成网络通信。文中介绍了由AT89C2051、CC4051、93LC46和CC4049等构成现场测控单元的硬件结构,多路采集器工作框图,采集模块软件流程和光电隔离电源电路。叙述了中央控制站软件功能模块,及其主要功能模块设计使用的OLE Automation和VB5.0报表生成器等方法,以及实现系统高可靠所采取的抗干扰和防腐蚀等安全性措施。     

战车武器故障测试系统研究

以工控PC机为核心,设计一个综合测试系统,其电缆接口连接被测武器系统的测试电缆。炮控系统部件、自动装弹系统部件测试由PC机直接控制,导弹控制部件测试采用模块化设计,通过总线与各测控模块连接在一起,测试指令由PC工控机发出,单片机实施,测试结果在PC机上显示,PC机与工控机之间通过RS232串口通信。应用结果表明：该测试系统使用方便、简单可靠,能检测武器系统中的绝大部分故障。     

RS422在反坦克导弹上的应用研究

文中根据RS422通讯协议的特点,结合反坦克导弹的工程研制,针对RS422应用时涉及到通讯网络布局、网络构建时的关键技术、通讯协议的制定等问题进行了针对性的研究,并提出了一系列具体工程实现方案。     

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.