基于80C196的Arinc429总线通信系统

基于80C196的Arinc429总线数据通信系统由总线发送/接收、扩展存储、监控等模块组成.下位机为ISA接口板.协议芯片HS-3282完成数据发送、缓存和转换,驱动芯片HS-3182完成系统内部逻辑与差分信号转换及传输速率调节.上位机PC处理发送/接收数据及显示,软件看门狗实现系统抗干扰.     

风压无线传感器网络测试系统

基于无线传感器网络的风压测试系统,由传感器节点、微处理器模块、无线通信模块及外围接口电路组成.在监测区域部署的压力传感器,通过自组织方式构成无线传感器网络.各传感器节点采集的数据沿其他传感器节点逐跳传输或存储在汇聚节点.系统监测人员通过人机交互功能模块对该网络发出命令,读取监测数据,并以无线通信方式传输给上位机.     

基于无线网络的大型武器装备故障诊断系统

基于无线网络的大型武器装备故障诊断系统,其下位机在32位微处理器S3C2410A基础上,进行外围扩展.包括信号采集、信号调理电路、JTAG接口、LED显示、无线网卡接口及RS232接口,从而实现大型武器装备数据采集及和上位机的无线数据交互.上位机由配置无线网卡微机组成.并采用笔记本电脑,通过无线网卡接受各下位机采集的信息并显示.通过调用数据库,对数据进行分析,查找故障原因.     

子母弹抛撒过程的存储遥测方法

针对子母弹抛撒特殊的爆炸环境和普通的测试系统安装布线难和无法及时获取数据等问题,提出了存储遥测方法。存储遥测装置由存储测试单元和无线传输单元组成,先存储数据后无线传输,可以完成子弹的角度、角速度、加速度等抛撒参数的实时采集存储与无线传输。实验表明:该方法在抛撒实验时可以很好地完成了数据存储和无线传输的功能,抗干扰能力强,误码率低,可以实时监测和控制测试装置。     

基于无线网络的大型装备在线监测与故障诊断

针对某大型武器装备系统庞大、故障检测难的特点，提出一种基于无线网络技术的在线监测与故障诊断方案。方案中下位机在ARM920T构架的32位微处理器S3C2410A基础上，进行外围扩展。包括信号采集、信号调理电路、JTAG接口、LED显示、无线网卡接口及RS232接口，从而实现大型武器装备各部位状态信息的数据采集及和上位主机的无线数据交互。上位主机由配置无线网卡微机组成，采用笔记本电脑，通过无线网卡接收各下位机采集的信息并显示，在专家系统的支持下给出检测诊断结论与故障信息。实验表明，该技术方案能实现大型武器装备的快速、准确故障定位与远程监测。     

基于BIT的电子装备状态与故障预测系统

基于BIT的电子装备状态与故障预测系统由上位机、多传感器、下位机、无线通信适配器组成.下位机完成信号采集,通过无线局域网接入点把信息传至数据库服务器.上位机与多个MCS51下位机按点对点方式通信,使用广播、呼叫、索取数据、设置参数命令等通信约定,完成信号分析处理、数据库管理、状态监控和故障预测.     

振动信号蓝牙智能传感器概念样机的设计

振动信号蓝牙智能传感器由蓝牙模块、主控微处理器、数据采集、信号调理、传感器和电源组成.传感器将非振动信号转换成电信号,经信号调理成转换为模拟电信号送到数据采集.数据采集再将其转换成数字信号送主控MCU.主控MCU通过蓝牙模块接收上位机命令,并将主控MCU发出的数据转换成蓝牙协议发送出去,同时将上位机发出的无线信号转换成数字信号送给主控MCU.     

某机载武器自动测试系统的设计

基于PC-DAQ的机载武器自动测试系统由主控机、数据采集与控制、多路信号切换及调理模块、武器离位激励系统等组成.系统软件由主控模块、测点切换、信号采集、故障分析处理等模块组成.用KingVIEW6.01组态软件编制测控程序,通过编写命令语言、定义数据变量连接外设、驱动接口和外设交换数据.各种检测信号经继电器接点、信号调理电路送主控机进行数据采集、检测和分析处理.     

MAX197在坦克炮塔试验台中的应用

坦克炮塔试验台由上位PC机、MAX197和AT89C52及软件组成.PC机以无线方式与AT89C52通信.数据采集以AT89C52单片机为主处理器,P2.7作片选信号,通过控制字的写入初始化MAX197,以确定其采集转换通道、量程和极性等,输出无符号二进制或二进制补码数据.其控制和通信软件用C开发.     

基于单片机控制的自动报靶系统

介绍一种瞄准练习用的自动报靶系统,系统主要由无线发射及无线接收两部分电路组成.发射电路完成靶面瞄准点数据的采集并由无线传送;接收电路将收到的数据进行处理,并控制语音播报与液晶屏显示.     

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.