基于LabVIEW虚拟仪器平台的外文翻译.doc

1、LabVIEW-based system components for military submarines compact test system We used LabVIEW, NI TestStand, and PXI to build a prototype to demonstrate that the new system can not only use modern test equipment and methods, but without sacrificing functionality under the premise of the current test s

2、ystem cost is only a small part.Vickie Hoffmann, Orbis Inc.LabVIEW graphics of signal processing platform by syllabary signal processing, and analysis and mathematics operations function composition of signal processing and mathematics function library composition, contains Wavelet transform, and ti

3、me-frequency analysis, and image processing, and filter design, and sound and vibration, and system identification, and RF analysis, professional method of tool package, while compatible. m file, mathematics script language and function interface, may and NI hardware of seamless combination, makes a

4、lgorithm get fast validation and deployment. LabVIEW signal processing platform has been successfully used in electronics, telecommunications, electrical and mechanical, chemical, medical, aerospace, physics and other fields of teaching and research work.Challenge Based VERSAmodule European standard

5、 bus (VME bus) test equipment is often used submarine system, verify whether the module is in its sub-components can be ready to use (ready for issue, RFI) state requires the use of large, complex, and laboratory environments testing equipment, and requires all the sub-components of the module in a

6、unified center for testing.Solution Use compact the NI PXI modular instruments, LabVIEW software and NI TestStand to develop and VME bus test equipment test function with the same military test systems, while significantly reducing the size, reduce complexity and costs, so that the Navy can be deplo

7、yed in the test system strategic location, and reduce overall maintenance costs and submarine fleet logistics costs. Orbis Inc. (Orbis) is a company with 130 employees of small businesses, is headquartered in the state of South Carolina in Charleston. Its core business is the U.S. Department of Defe

8、nse (DoD) to provide engineering and project management services. Orbis is also committed to conduct cutting-edge research and development projects, focusing on developing innovative automated test systems (ATS).To meet military needs Critical operational systems and support suite many systems based

9、 on VME technology. These systems maintenance and troubleshooting involves sub-assemblies between the module and the RFI spare parts are interchangeable. System troubleshooting procedures use any of the modules must be re-tested and verified before they can return to RFI status and kept as a spare.

10、As the traditional system, all tests were carried out in a central position, the total cost of ownership will increase. In addition to the cost of transport module, another major cost from the parts to maintain sufficient inventory to replace being tested and the components during transport. Based o

11、n the automated testing and functional testing for the U.S. Department of Defense to write code for the experience, the Navy found Orbis to help them develop a compact, flexible and can meet or exceed the existing test systems functional prototype test system. We have successfully built a prototype

12、to demonstrate the new system can not only use modern testing equipment and methods, and in the premise without sacrificing functionality test systems currently cost only a small part.From the NI PXI modular instruments to find solutions By using the stand-alone instruments and modular instruments f

13、or comparing various solutions, we decided to use PXI modular instrumentation platform, because we need a compact and flexible test system. Next, we analyzed the suppliers, chose NI PXI devices as the sole supplier because the company is the leader in PXI, NI offers a wide range of PXI modules to me

14、et the needs of our test systems and technical requirements, the The company also provides a plug and play environment. PXI platform for our development provides a good start, because NI Modules and LabVIEW to ensure that all devices can communicate without having to create custom device drivers. We

15、 use two NI PXI-2531 module to create an 8 128 crosspoint switch matrix to the PXI measurement module connected to all points on the mass interconnect interface test adapters (ITA). With this switch matrix, we have to connect to the ITA DUT (UUT) to achieve full functional test configurations all th

16、e required connections. Additionally, we will VME interface is integrated into the test system and connect it to the ITA, which provides for each UUT comprehensive VME bus test.Integrated NI PXI and LabVIEW, NI TestStand We primarily written in LabVIEW and NI TestStand test systems test assembly. By

17、 eliminating the need to write custom drivers, NI software greatly simplifies the hardware and software systems integration. After starting the program, LabVIEW will call each PXI modules for self-test operation, check the calibration date is valid, and then the functional tests. Each test written i

18、n LabVIEW, NI TestStand to call in the execution. The end of the test execution, the test will be based on the collected data and generate a readable report can be exported in XML format.NI Technology List Our application through the NI PXI-8108 embedded controller to achieve the management tasks th

19、rough the NI PXI-6653 and NI PXI-6651 module to control the timing and synchronization. For the connection, cycle computing and communications, we use NI PXI-7813R to achieve data integration, NI PXI-7853R module process connection and signal processing as well as NI PXI-7854R module for signal proc

20、essing. In order to develop the current stabilization system, we use NI LabVIEW 2010 software, LabVIEW FPGA Module and the LabVIEW Real-Time Module. Development process largely depends on training and NI LabVIEW volume license agreement.Changing views on Compact ATS Orbis will PXI-based test system

21、with a custom ITA and VME interfaces combine design and build a prototype called Compact Tester test system. Compact Tester with 12 cubic feet of 18-slot PXI chassis test system replaces the 84 cubic feet of test systems. Compared with the previous test systems, cost reduction of 3 times, 15 times s

22、maller footprint, weight 25 times, this difference is very significant. In addition, the use of industry-standard PXI hardware and LabVIEW software, we were also able to reduce the daily operation and maintenance costs. In addition to achieving all the goals set for the Compact Tester, the PXI-based

23、 system also has other advantages. Interconnection due to the size and mass reduction, thereby completing the number of cables required for each test is significantly reduced. Which in turn allows us to reduce the cable can acquire more real signals, greatly improving the accuracy of each measuremen

24、t. With LabVIEW, NI TestStand and NI PXI modular instruments, Orbis Compact Tester quickly developed a prototype to demonstrate the Navy. Navy test new functionality provided by the system, the potential cost savings, as well as reducing signal noise RFI spares returned to the Treasury to reduce the

25、 time and other advantages cooing.Multithreaded programming challenge To date, the processor technology in the field of innovation has made your computer is working at higher clock speed of the central processing unit (CPU). However, as the clock rate approaching its theoretical physical limits with

26、 multiple (rather than individual) among the new processors are in the research and development of nuclear. Take advantage of these new multicore processor for automated test applications using parallel programming techniques, you can achieve the best performance and highest throughput. Dr Edward Le

27、e-the University of California, Berkeley, distinguished professor of electrical and computer engineering department-describe parallel processing technology. Many technology experts predicted that response will be the end of Moores increasingly parallel computer architectures. If we want to continue

28、to improve performance, computer programs must be able to take advantage of the parallelism. ”Also, take advantage of multi-core processor application programming is a huge programming challenges, and this is widely accepted. -Microsoft founder Bill Gates-about this challenge has this passage: To fu

29、lly harness the power of parallel processors, . Software must be able to deal with concurrency issues. But, as any writing multi-threaded code developer tell you that, this is one of the most daunting tasks in the field of programming. ” Was lucky, LabVIEW for multicore processors provide an ideal p

30、rogramming environment, because it provides a visual environment for creating parallel algorithm, and it can be dynamically assigning multiple threads to a given application. In fact, the use of automated test applications for multi-core processors, can easily be optimized to obtain the best perform

31、ance. Moreover, PXIe modular instrument to enhance this technical advantage, because the PCIe bus high data transfer rates possible. From multicore processors and PXIe devices two specific applications are: multichannel signal analysis and online processing (hardware in the loop). In the subsequent

32、sections of this article, we will examine the various parallel programming techniques, characterization and performance advantages associated with each technology.基于LabVIEW用于军用潜艇系统组件的紧凑型测试系统“我们采用LabVIEW、NI TestStand和PXI来构建原型，以证明新系统不仅可以利用现代化测试设备和方法，而且在无需牺牲功能的前提下成本仅为当前测试系统的一小部分。”Vickie Hoffmann, Orbis

33、 Inc. LabVIEW图形化信号处理平台由千余个信号处理、分析与数学运算函数组成的信号处理与数学函数库组成，包含小波变换、时频分析、图像处理、滤波器设计、声音与振动、系统辨识、RF分析等专业方法的工具包，同时兼容.m文件等数学脚本语言与函数接口，可与NI硬件的无缝结合，使算法得到快速验证与部署。LabVIEW信号处理平台已成功应用于电子、通讯、机电、医疗、航空航天、物理、化工等多个领域的教学和科研工作。基于VERSAmodule欧洲标准总线（VME总线）的测试设备通常被用于潜艇系中，验证其子组件模块是否处于可随时投入使用(ready for issue ,RFI)的状态需要使用大型、复杂和

34、实验室环境中的检测设备，并且要求所有的子组件模块在统一的中心位置进行测试。解决方案使用紧凑小巧的NI PXI模块化仪器、LabVIEW软件和NI TestStand来开发与VME总线测试设备具有相同军用测试功能的测试系统，同时大幅减少尺寸，降低复杂性和成本，使海军能够将测试系统部署在战略位置，并降低整体维护成本和潜艇舰队的物流成本。 Orbis Inc. (Orbis)是一家拥有130名员工的小型企业，总部设在南卡罗来纳州的查尔斯顿。其核心业务是为美国国防部(DoD）提供工程和项目管理服务。Orbis还致力于开展前沿的研发项目，重点开发创新型自动化测试系统(ATS)。满足军事需求关键作战系统和

35、支持套件中的许多系统采用基于VME的技术。这些系统的维修和故障排除涉及子组件模块与RFI备件之间的互换。系统故障排除过程使用的任何模块必须在重新测试和验证后才可以返回RFI状态，并作为备件保存。由于传统系统的所有测试均在一个中心位置上进行，总拥有成本便会增加。除了运输模块的成本之外，另一个主要的成本来自于保持足够的备件库存以替换正在测试和运输过程中的组件。 基于在自动化测试和为美国国防部编写功能测试代码的经验，海军找到Orbis来帮助他们开发一个紧凑灵活且可满足或超过现有测试系统功能的原型测试系统。我们成功搭建了原型来证明新系统不仅可以利用现代化测试设备和方法，且在无需牺牲功能的前提下成本仅为

36、当前测试系统的一小部分。从NI PXI模块化仪器中寻找解决方案通过使用独立运行的仪器和模块化仪器对各种解决方案进行比较，我们决定采用PXI模块化仪器平台，因为我们需要一个紧凑灵活的测试系统。接着，我们对供应商进行分析后，选择了NI作为PXI设备的唯一供应商，因为该公司是PXI领域的领导者，NI提供了广泛的PXI模块，符合我们测试系统的需求和技术要求，该公司还提供了“即插即用”的环境。PXI平台为我们的开发提供了一个良好的开端，因为NI模块保证所有设备能够与LabVIEW通信，而无需创建自定义设备驱动程序。 我们使用两个NI PXI-2531模块来创建一个8128个交叉点开关矩阵，以将PXI测量

37、模块上的所有点连接至大规模互连接口测试适配器(ITA)。通过这个开关矩阵，我们为连接到ITA的待测设备(UUT) 实现全功能测试配置了所需的所有连接。此外，我们还将VME接口集成到测试系统，并将其连接至ITA，从而为每个UUT提供了全面的VME总线测试。集成NI PXI和LabVIEW、NI TestStand我们主要在LabVIEW和NI TestStand中编写测试系统的测试程序集。由于无需编写自定义驱动程序，NI软件极大简化了软硬件系统的集成。启动程序后，LabVIEW会调用每个PXI模块、进行自检操作、检查校准日期是否有效，然后再进行功能测试。每个测试在 LabVIEW中编写，在NI

38、TestStand中调用执行。测试执行结束时，便会根据所采集的测试数据生成一份易读且可导出的XML格式报告。 NI技术一览我们的应用通过NI PXI-8108嵌入式控制器来实现管理任务，通过NI PXI-6653和NI PXI-6651模块来控制定时和同步。对于连接、周期内计算和通信，我们采用NI PXI-7813R来实现数据融合、NI PXI-7853R模块实现过程连接和信号处理以及NI PXI-7854R模块实现信号后处理。 为了开发当前的稳定系统，我们使用NI LabVIEW 2010软件、LabVIEW FPGA模块以及LabVIEW Real-Time模块。开发过程很大程度取决于La

39、bVIEW培训和NI批量许可证协议。改变对Compact ATS的看法Orbis将基于PXI的测试系统与自定义ITA和VME接口结合起来，设计和构建了名为Compact Tester的原型测试系统。Compact Tester以12立方英尺的18槽PXI机箱测试系统替代了84立方英尺的测试系统。与之前的测试系统相比，成本降低了3倍，占地面积减少了15倍，重量减轻了25倍，这种差别是非常显著的。此外，使用工业标准的PXI硬件和LabVIEW软件，我们还能够减少日常的运行和维护成本。 除了实现所有为Compact Tester设定的目标之外，基于PXI的系统还具有其他优势。由于尺寸和大规模互连的减

40、少，因此完成每个测试所需的电缆数量大幅减少。而电缆的减少反过来可使我们能够采集到更真实的信号，大大提高每次测量的准确性。 借助LabVIEW、NI TestStand和NI PXI模块化仪器，Orbis快速开发了Compact Tester的原型并向海军进行演示。海军对新系统所提供的测试功能、潜在的成本节约、信号噪声降低以及 RFI备件返库时间减少等优势啧啧称赞。多线程编程的挑战 迄今，处理器技术领域中的创新已经使得计算机具备了工作于更高时钟速率的中央处理器单元（CPU）。然而，随着时钟速率逼近其理论上的物理极限，具有多个（而不是单个）处理核的新型处理器正处于研发之中。利用这些新型多核处理器，

41、自动化测试应用利用并行编程技术，便可以达到最佳性能和最高吞吐量。Edward Lee博士加州大学伯克利分校电气与计算机工程系的杰出教授这样描述并行处理的技术优势：“许多技术专家预言，回应摩尔定律的终结的将是日趋并行的计算机架构。如果我们希望继续提高计算性能，计算机程序必须能够利用这种并行机制。”而且，利用多核处理器的编程应用是一个巨大的编程挑战，这是广为接受的。比尔盖茨微软公司的缔造者关于这一挑战有这样一段话：“要想充分利用并行工作的处理器的威力，软件必须能够处理并发性问题。但正如任何一位编写过多线程代码的开发者告诉你的那样，这是编程领域最艰巨的任务之一。”幸运的是，LabVIEW为多核处理器提供了一个理想的编程环境，因为它为创建并行算法提供了一个直观的环境，而且它可以动态指派多个线程至一项给定的应用。事实上，利用多核处理器的自动化测试应用，可以方便地被优化以获取最佳性能。而且，PXIe模块化仪器增强了这一技术优势，因为PCIe总线使高数据传输速率成为可能。从多核处理器和PXIe仪器的两个具体应用是：多通道信号分析和线上处理（硬件在环）。在本文的后续部分，我们将评估各种并行编程技术，并刻画每项技术所带来的性能优势。