ProFiBus在炮弹弹药自动装配生产线中的应用

基于ProFiBus现场总线的炮弹弹药自动装配生产线控制系统,包括管理决策、控制和执行3层.管理决策层由3台通过以太网连接的工业计算机组成,形成系统数据共享.控制层采用ProFiBus-DP现场总线,使用主从通信方式.执行层采用ET200M分布式I/O系统,完成数字量和模拟量信号现场采集与控制.     

基于I2C总线接口的智能温控系统

基于I2C总线接口的智能温控系统由AT89C2051单片机和LM76温度传感器及软件组成.通过单片机AT89C2051通用I/O口模拟I2C总线,控制温度传感器LM76.并采用监控程序、I2C总线模拟通用子程序等软件实现测控功能和数字平滑滤波.该系统留有RS-485通信端口,符合先进电源接口(ACPI)规范.     

基于I2C总线接口的智能温控系统

基于I2C总线接口的智能温控系统由AT89C2051单片机和LM76温度传感器及软件组成.通过单片机AT89C2051通用I/O口模拟I2C总线,控制温度传感器LM76.并采用监控程序、I2C总线模拟通用子程序等软件实现测控功能和数字平滑滤波.该系统留有RS-485通信端口,符合先进电源接口(ACPI)规范.     

基于ARM的生产控制平台

为解决传统工业控制技术存在的问题,设计一种基于ARM芯片的嵌入式控制平台。该平台以嵌入式ARM为核心,以移植μCLinux实时操作系统的嵌入式ARM平台作为下位机,以工控机作为上位机,并结合CAN总线技术实现对工业生产的控制。详细介绍了其软、硬件的设计,包括下位机的I/O模块设计、CAN总线设备在μCLinux下的驱动实现和μCLinux实时操作系统的移植等。该方案突破传统控制模式,具有更强大的处理能力和更优越的通信方式,适用于工业现场的安装和监控。     

基于ISA总线的MIC总线控制器的设计与实现

MIC总线是专门为解决在恶劣环境下电力 /数据的分配和管理而开发的一种具有高可靠性的现场控制总线 .该文介绍了基于ISA总线的MIC总线控制器的设计实现过程 .在演示系统上的通信实验正确实现了总线协议 .     

智能化缝制单元控制系统的实现

介绍了智能化缝制单元（全功能特种缝纫机）控制系统的解决方案。方案1采用电控系统＋外置式可编程PLC结构,其工业缝纫机由电控系统完成,辅助功能由PLC完成,电控系统与PLC之间通过通信实现控制协调和信息交换。方案2采用电控系统中内嵌PLC功能的结构,全部控制由一个CPU完成,控制系统硬件的I/O点有20余个,除基本I/O外,其余I/O可由用户自定义其辅助功能及时序。     

基于CAN总线的混凝土拌和站控制系统

根据混凝土搅拌站集中管理和分散实时控制要求,现场控制节点系统由中央控制计算机、现场总线、远程监控和现场节点机构成.系统上位机为工控机.下位机以AT90S8535为核心,RAM62256(32K)作为数据存储器,采用CAN总线协议通讯,实现对多个现场单元的控制.     

基于VXI总线的开关量I/O模件设计

开关量I/O对于导弹地面测发控系统完成控制和状态监测任务必不可少。介绍了基于VXI总线的C尺寸32路开关量I/O模件的硬件设计,利用VXI总线标准化、模块化的特点,以CPLD为核心实现了其接口电路,并给出了各部分逻辑控制电路的时序仿真;采用隔离技术实现了电源与通道及通道与通道间的隔离。该模件硬件已调试完毕,结果表明,VXI接口电路符合VXI总线时序规范要求,抗干扰能力较强。     

CAN总线与串行总线高速接口的设计

当前CAN总线与串口通信接口转换均采用单片机,有效转换速率很低,不能满足条件苛刻的场合;采用CPLD/FPGA进行协议直接转换的方案,能极大地提高系统的有效转换速率;为进一步提高系统的可靠性,采用CAN总线驱动器热冗余技术;通过CPLD/FPGA将CAN总线控制器的内部寄存器直接映像到PC104总线I/O上,解决了I/O映像或双口RAM速率较低、电路复杂的缺点.以RS485型串口为例,它的有效转换速率在同等情况下是传统产品的2～3倍,实时性和可靠性明显得到改善.     

现场总线控制系统综述

简述了现场总线控制系统的本质含义、原理、系统组成以及总线标准，简介了FFH1、PROFIBUS（过程现场总线）、WorldFIP(全球工厂仪表协议）、P-NET、FFHSE和其它类型的现场总线产品，以及多总线共存、Ethernet与现场总线相容和FCS与DCS集成的现场总线发展趋势，及其注重应用效果。系统结构设计原则、产品的开放与互操作性和控制策略等应用对策。     

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.