Destructive Testing Uses VXI Fiber Optics for Data Acquisition

VXIbus is an ideal standard for instrumentation associated with developmental test systems used by industrial applications due to its adaptability, accuracy, and responsiveness. This application note is one such example of a VXI solution for a worldwide leader in commercial property and risk management that operates a destructive test facility to analyze the results of disasters predominantly caused by fire. The company implemented a re-configurable 2,400 channel test system based on Kinetic Systems' VXI modules that used a fiber optic ring to synchronize multiple chassis and multiple channels. Technical details of the VXI implementation and results will be discussed     

LXI-新一代测试总线技术

LXI是继GPIB、VXI和PXI总线技术之后,基于以太网络的新一代自动测试系统模块化构架平台标准.LXI技术构建在久经证明的工业标准上,融合了GPIB 仪器的高性能、VXI/PXI 卡式仪器的小体积以及LAN 的高速吞吐率, 能够快速、高效率、高性价比的构建测试系统.介绍了LXI技术规范,分析了网络消息触发、IEEE-1588时钟同步触发和触发总线等三种定时与同步技术的原理,重点分析了LXI技术特点及其诸多优点,最后简要阐述了LXI的应用前景.     

基于DSP的ARINC429总线接口设计

ARINC429总线广泛应用在军用及民用飞机上,针对现今要求较高的自动测试系统中广泛采用VXI测试总线结构,同时VXI-ARINC429接口板价格昂贵的现状,对应用在某型飞机空对地攻击系统的自动测试系统中的VXI-ARINC429接口板进行了设计研究.该接口板采用了高速DSP、高集成度的CPLD和高性能的ARINC429接口芯片,经过测试表明,该接口板性能稳定可靠,很好地满足了自动测试系统的需求.     

RapidIO互连技术研究及其模型验证

随着计算机技术的飞速发展,传统总线已远远无法满足目前和未来高性能计算机系统的I／O性能需求。介绍了一种新的基于包交换的I／O互连技术——RapidIO。通过介绍RapidIO协议规范以及将RapidIO和几种新兴高性能I／O互连技术（PCIExpress等）的对比,指出了RapidIO在满足高性能计算机系统的I/O性能需求方面的优势,最后给出了RapidIO验证模型并对验证结果进行了分析．     

VXI based breadboard module use

Plug-in VXI based breadboard modules are an excellent solution to achieve a lower costing, time and hardware saving test bench. These breadboard modules are equipped with built-in VXI bus interface circuitry and a breadboard area for creating a design to suit your test needs. A prime example for the use of this capability was demonstrated on a recent radar system test bench created to test many unique Units Under Test (UUTs) previously tested on separate test benches. A single breadboard module design replaced the dedicated interface and control hardware within the many test benches and test fixtures previously used to test the individual UUTs. This paper presents some design considerations and techniques implemented as part of this VXI breadboard module that can be useful when creating a VXI breadboard design. It also addresses the inherent built-in test capabilities provided by the module in conjunction with the techniques presented in the paper     

基于VXI总线的检测软件设计

基于VXI总线和虚拟仪器技术，研制开发了用于外场的模拟式电子控制器检测软件，并对软件开发的过程和要求进行了分析，重点解决了程序设计中的需求分析和模块化设计问题。     

基于VMIC和VXI分布式导弹自动测试平台

为满足某新型导弹测试需求,设计了基于VMIC和VXI总线的分布式导弹自动测试平台.阐述了自动测试平台的工作原理、设计方法及软硬件系统组成;平台采用VXI总线建立全弹流程控制环境,通过反射内存卡组成实时信号传输测试网络.经实践证明,构建的基于网络的导弹综合自动测试平台,能完成导弹总体性能的自动测试与评估,工作稳定,性能可靠,能够很好地满足某新型产品的测试需求.     

AS4074 与宝石柱 HSDB 协议性能分析及比较

对高速线性令牌传递数据总线的性能进行了分析,建立了排队系统模型,并导出了节点消息延时、等待队列长度等网络特性与网络吞吐量之间的关系表达式,着重讨论了AS4074和宝石柱HSDB两种协议的性能差异,得出AS4074在中、低负载情况下性能优于宝石柱HSDB,因而更适合于新一代航空电子综合系统的结论。     

基于VXI总线的自动测试系统设计

传统测试系统已难以满足目前复杂多样的航空电子设备的测试要求。使用虚拟仪器技术及LabWindows/CVI开发平台,开发了一种基于VXI总线为核心,GPIB总线为辅助的自动测试系统,并从硬件和软件两个方面说明了系统的设计原理和实现方法。系统具有良好的人机交互界面,在使用过程中运行稳定可靠、测试效率高、故障定位快速准确、使用维护方便。     

Open systems architecture solutions for military avionics testing

Raytheon makes extensive use of open systems architecture methods in developing special test equipment (STE) for testing military avionics equipment. Such use has resulted in significant cost and schedule savings in the development of production test equipment for radar and infrared systems. With open systems architectures, a test system can be assembled using COTS products. This brings economies of scale to test equipment, which is normally built in very low quantities. Therefore, the potential cost savings due to COTS usage is proportionately greater in STE than in the higher volume avionics systems that are tested. A second major benefit of using COTS products is that test system development schedule cycle time is greatly reduced. This paper describes the application of Open Systems Architectures (OSA) to avionics testing. The following major architectures are surveyed: VME bus, VXI bus, IEEE GPIB, IEEE 1149.1 JTAG test bus, 1553 Military Bus, Fibre Channel, and COTS Test Applications Software. We describe how the benefits of OSA have been extended at Raytheon into achieving vertical test commonalities. The flexibility of OSA can be exploited to provide an overall optimum test solution, taking all levels of test into account. For example, test systems can be tailored with COTS products to provide integrated methods for avionics tests at the module, unit, and system levels. Test systems can be configured to maximize the reuse of COTS hardware over all test levels. Test software can also be programmed to optimize such reuse over levels of test. Additional test verticality synergies derived from such OSA usage are described, including: test false alarm avoidance; test cones of tolerance optimization; and efficient test of field returns     

发动机稳定性试验研究VXI总线测试系统

发动机稳定性试验研究VXI总线测试系统是针对涡扇／涡喷发动机进行流场畸变试验以及气动稳定性试验研究装置而开发的测试系统，达到了国内先进水平，本文介绍了该系统的功能，技术指标，系统组成，工作原理和软件设计等。     

Future test system architectures

An expanding number of test system architectural choices has caused confusion in the test engineering community. This will show the strengths and weaknesses of existing test system architectures including rack and stack systems with GPIB instruments and modular systems like VXI and PXI. It will provide a glimpse into an emerging new architecture: LAN-based test systems. The paper reviews key concerns such as costs, channel counts, footprints, IO speeds, ease-of-integration, and flexibility. The objective of the paper is to provide engineers insight into the most effective test systems for their future applications.     

基于VXI总线的某嵌入式计算机测试系统实现

简单分析了某嵌入式计算机主要技术指标,介绍了其测试系统的设计,测试系统采用基于VXI总线技术的标准模块配置,软件采用LabWindows/CVI工具编写。该测试系统工作稳定,满足某嵌入式计算机对模拟前端一致性测试、模拟前端隔离度测试、AD转换精度测试、DA转换精度测试、离散量测试等多项特殊测试要求。     

基于VXI总线的无人机综合测试系统的设计

利用VXI总线技术开放式的体系结构和模块化的自动测试技术的优势,结合国产无人机现状,研发了基于虚拟仪器的综合检测系统.该系统具有通用性好、扩展性强、标准化程度高的特点.文章给出了测试仪的硬件配置和在LabWindows/CVI环境下的软件模块化设计方案及实现方法.     

串行RapidIO技术在GNC领域中的应用分析

RapidIO高速串行总线作为新一代嵌入式系统互连总线,具有高速度、低延时、高可靠性等特性,同时能够很好地适应综合的模块化航空电子设备（IMA）的要求。介绍了互连总线的发展过程,对分析了串行RapidIO协议特点,针对GNC领域嵌入式系统的要求,给出了基于串行Ra-pidIO总线的互连模型。     

机载火控系统远程测试装置的设计与实现

介绍了一种用VXI总线技术组建的机载火控系统远程测试装置 ,以及该装置的硬件配置和在LabWindows/CVI环境下的软件模块化设计     

舰载导弹箱式发射装置综合测控系统

提出了一种以 VXI总线为核心的舰载导弹箱式发射装置综合测控系统 ,介绍了基本结构、组成和功用 ,并对舰载导弹箱式发射装置中贮运发射箱 (STL )内环境监控、导弹综合测试、发射过程控制、射击参数装定以及应急状态自动处理等进行了设计     

New Data Bus Interface Technique

Data bus systems as defined in MIL-STD-1553B are widely used in aerospace instrumentation systems for digital data transmissions between units on the bus. Although the bus is protected against a short circuit which may occur in the remote unit electronics or transformer, it has no protection against a cable termination failure. Open or short failure along main bus cable results in failure of the entire bus system. A new data bus interface technique is described which is insensitive to cable termination failure. The central feature of this new interface circuit is that communication between main unit and remote units is not affected by the cable termination failure. In applications such as multistage missiles, no provisions need be made for retermination in the cable characteristic impedance after stage separation. The key to this new technique is a directional coupling transformer which is only slightly more complicated than standard interface transformers. Design equations for directional coupling transformer and experimental results of new data bus systems are presented.     

An Ultrahigh Speed CAMAC Interface for a Large Flight Simulator System

The real-time simulation subsystem (RTSS) at the NASA Langley Research Center in Hampton, VA, consists of several CDC CYBER computers and over 20 flight simulation sites. This simulation network is used by the Langley Center to advance the state of aeronautics and to improve air safety. The current simulator interface system at NASA-Langley was installed in 1968 and uses centrally located analog and discrete conversion equipment. Of the alternatives studied by NASA for a replacement RTSS, only the network and input/output (I/O) system conforming to the international computer automated measurement and control (CAMAC) standards meets their requirements. The CAMAC serial highway provides a distributed I/O system with an extremely high data throughput approaching 24 000 000 information bits/per second. Fiber-optic links transmit the data over paths to 1 km. For multisite simulations, a computer-controlled electronic switch configures site highways in any combination. The CAMAC system uses analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and synchro converters with 16 bits of resolution to give the needed system performance. The time to acquire data from 80 16-bit ADCs and 960 discrete inputs and transfer them to the CYBER central memory is less than 320 ?s. Similarly, the time from CYBER central memory to the setting of 256 16-bit DACs and 960 discrete outputs is less than 650 ?s.     

基于PCI总线接口的SD主控制器的设计与实现

SD卡已在消费型电子产品中得到了广泛应用,在显示控制系统中如何实现对SD卡的支持也变得很重要,而目前在机载计算机中占主流的PowerPC微处理中没有集成SD主控制器,因此研究和实现在PowerPC模块中对SD卡的读写访问就显得很有意义。在分析SD主控制器规范的基础上,采用功能模块化的方法,设计和实现了基于PCI总线接口,支持DMA传输的SD主控制器。测试结果表明,该SD主控制器数据传输稳定,并且具有硬件逻辑方便移植、重构的特点,可应用于PCI总线接口的嵌入式系统中。