By Topic

20-23 Sept. 2004

Filter Results

Displaying Results 1 - 25 of 148
  • A formal framework for predictive maintenance

    Publication Year: 2004, Page(s):489 - 495
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    This paper begins the process of specifying a particular predictive maintenance (PM) software system using formal methods. Specifically, schema diagrams in formal Z notation are used to specify an integrated set of black box PM operations devoid of implementation details. The schema diagrams describe the input-output behavior of the PM operations and employ high-level abstract mathematical data ty... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Protecting RF signal paths from accidental DC misconnects or ESD without affecting RF performance

    Publication Year: 2004, Page(s):371 - 375
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (203 KB) | HTML iconHTML

    Radio frequency (RF) data collection is a basic part of instrument testing. By their very nature, however, RF ports are connected to less than robust structures inside the test gear. high frequency transistors and integrated circuits (ICs) must have small, low breakdown voltage, and low capacitance junctions to produce the required gains at RF frequencies from the high frequency (HF) to the ultra-... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The integration of vehicular diagnostics and prognostics with autonomic logistics

    Publication Year: 2004, Page(s):482 - 488
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (398 KB) | HTML iconHTML

    The overall function of integrated diagnostic, prognostic and autonomic logistics systems depends on a consistent definition of anomalies, faults, failure modes and performance failures as process drivers. Within the context of a concurrent intra/extra-vehicular design process, these drivers plus concomitant data can be used as feed forward to autonomic logistics, as the basis for diagnostic knowl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An approach to fault diagnosis of helicopter planetary gears

    Publication Year: 2004, Page(s):475 - 481
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB) | HTML iconHTML

    Failure of flight critical components on-board a helicopter could cause an accident resulting in loss of life and/or aircraft. It is imperative, therefore, that precursors of such failure modes be monitored continuously and remedial action be taken as soon as feasible in order to avoid catastrophic events. A crack in the planetary carrier of a UH-60 Blackhawk main transmission has received recentl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Broadband deep memory testing via virtual instrumentation

    Publication Year: 2004, Page(s):367 - 370
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB) | HTML iconHTML

    The broadband wireless communications environment of military signal testing demands reusability and flexibility. Coupled with this requirement is the fact that diverse military organizations are now in need of modularized virtual instrumentation, which can handle multi-banded and frequency agile radios. The implementation of advanced signal analysis techniques and ultra-broadband signal generatio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A method for determining ATE input power requirements

    Publication Year: 2004, Page(s):11 - 17
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (351 KB) | HTML iconHTML

    The paper discusses elements of the production RTCASS (reconfigurable transportable consolidated automated support system) power system design. The system power supplies were characterized with a commercial Nexus power monitor as the major contributors to load. The characterizations were combined with load points derived from ATLAS (abbreviated test language for all systems) test program code usin... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interface test adapters (ITA) "Design to Build" a primer on rapid availability, reduced cost, and improved maintainability

    Publication Year: 2004, Page(s):124 - 128
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    Interface test adapters (ITAs) are truly the place where the "rubber meets the road" in any automated test system (ATS). As the primary electrical interface between the ATS and the unit under test (UUT), the ITA occupies a critical juncture in the overall effectiveness of the ATS concept. For military applications where identical ITA configurations will be produced to support various field or depo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Approaches to semantic interoperability for advanced diagnostics architectures

    Publication Year: 2004, Page(s):466 - 474
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (494 KB) | HTML iconHTML

    The goal of developing advanced diagnostic architectures is to provide a computing infrastructure that can support integration of open, modular software components that maximize reuse of not only static local data but results of dynamic information processing at other nodes in the network-centric architecture as well. Emerging technologies in the support system environment address the development,... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Using an in-kernel emulator for TPS development and testing

    Publication Year: 2004, Page(s):268 - 272
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (209 KB) | HTML iconHTML

    This paper outlines an approach to developing an emulation environment embedded in an automated test system (ATS) controller's operating system kernel. By taking this approach, it is possible to design an emulator that is built for multiple ATS environments, allowing it to be seamlessly ported from ATS to ATS for use with many different test program sets (TPS). This paper then explores possible us... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ANSI mezzanine modules facilitate flexible reconfiguration

    Publication Year: 2004, Page(s):321 - 324
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (214 KB) | HTML iconHTML

    This document examines the growing trend towards more modular forms of instrumentation and how they may be used across multiple instrument platforms. The multi-vendor support for this trend is shown as is its application to reconfigurable and legacy applications. Ongoing activity and future directions are briefly enumerated. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Using open networking standards over MIL-STD-1553 networks

    Publication Year: 2004, Page(s):117 - 123
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    Over the past several decades, the MIL-STD-1553 networking technology has found use in a number of military and aerospace platforms including applications on aircraft, ships, tanks, missiles, satellites, and even the International Space Station. In developing software applications for these platforms, the use of modern, open networking standards such as TCP/IP is often a preferable solution. The I... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • TPS development of parallel automatic test systems

    Publication Year: 2004, Page(s):248 - 253
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    With current generation and next generation test systems focusing on testing efficiency, it is critical to develop test strategies that maximize testing throughput, make better use of the increasingly expensive instruments used in test station and drive down test costs. Parallel test, which means multiple units-under-test (UUTs) can undergo testing simultaneously, improves testing strategy by enha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Where does the hardware end and the software begin?

    Publication Year: 2004, Page(s):136 - 138
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB) | HTML iconHTML

    Before integrated engineering process teams and system engineering concepts, hardware and software development groups often had walls between them. These walls were intellectual, emotional, departmental, and usually physical. Design a piece of hardware and throw it over the wall to the software group to program up. Now, in the days of immensely dense application specific integrated circuits (ASICs... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New optical switches enable automated testing with true flexibility

    Publication Year: 2004, Page(s):361 - 366
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (270 KB) | HTML iconHTML

    The proliferation of fiber optic systems in military and avionics platforms is driven by the ever increasing need for higher data rates to support multi-sensor data fusion. Traditionally, the test systems to support these optical deployments are manual and inefficient. Increasingly fast optical components require optical test equipment that is very expensive. To make cost effective test suites, it... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fault diagnosis in HVAC chillers using data-driven techniques

    Publication Year: 2004, Page(s):407 - 413
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (337 KB) | HTML iconHTML

    Failures in HVAC systems occur frequently and lead to loss of comfort, degradation in operational efficiency, and increased wear and tear on the system equipment. Faulty HVAC systems seriously affect the energy efficiency of commercial buildings; they are oftentimes the causes for exceeding the allocated demand margins resulting in steep monetary penalties. A real-time fault detection and isolatio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automated measuring system designed to calibrate measuring devices using Virtual Standards® technology

    Publication Year: 2004, Page(s):158 - 164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (241 KB) | HTML iconHTML

    An automated measuring system is proposed to calibrate measuring devices designed to perform a wide range of measurements using the Virtual Standards® technology. The Virtual Standards® technology is a universal technology for determining and introducing corrections in measuring device readings to reduce their errors. Theoretical principles underlying the Virtual Standards® technology ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ethernet-based instrumentation for ATE

    Publication Year: 2004, Page(s):316 - 320
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (206 KB) | HTML iconHTML

    The emerging trend in the instrumentation industry is a move away from established parallel communications interfaces, such as GPIB and MXI-2, towards high-speed serial interfaces. The computer industry has adopted this philosophy and migrated nearly all peripheral connections to USB or Firewire. This trend is continuing with the elimination of plug-in style interfaces and the adoption of high-spe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An artificial neural network architecture for application in general diagnostics

    Publication Year: 2004, Page(s):402 - 406
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB) | HTML iconHTML

    The application of computing rapidly advanced the test field, particularly the development of automatic test equipment (ATE). Typically the application of computers has been focussed on the control of instrumentation, allowing a large number of complex tests to be performed, with relatively little human interaction. The main development in computing that has propagated to the test environment has ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Best practices for development and deployment of man-portable ATE

    Publication Year: 2004, Page(s):23 - 29
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (365 KB) | HTML iconHTML

    Man-portable test systems are under severe size, weight, environmental and power consumption constraints. Yet, these systems generally must provide all test capabilities required by the supported units-under-test (UUT). The successful development of man-portable systems requires a paradigm shift in the test system architectural design. General purpose ATE architectures by and large still do not ad... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automated troubleshooting tools for minimizing downtime and reducing the labor and material costs of C-5 aircraft

    Publication Year: 2004, Page(s):504 - 510
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB) | HTML iconHTML

    Based on recent reports (T.L. Ramey 1999, J.E. Pike 2000-2004), a large percentage of C-5 aircraft were found not mission capable due to maintenance problems. For example, in one location, no more than eight out of 22 C-5's were mission capable. These maintenance problems reveal the need to improve the utilization of current diagnostic systems. This paper emphasizes such a system, known as the mal... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Distributed supervisory control and data acquisition (SCADA) software: issues and state of the art

    Publication Year: 2004, Page(s):332 - 337
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (337 KB) | HTML iconHTML

    Internet-enabled supervisory control and data acquisition (SCADA) for condition monitoring and fault diagnosis have been widely used in modern industrial manufacturing, as they are capable of providing more efficient and reliable decision making support. More recently, with the appearance of inexpensive sensors, microprocessors, and actuators, distributed and embedded systems are under rapid devel... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Approximation of diagnostic importance factors using Markov models for diagnostic test sequencing

    Publication Year: 2004, Page(s):241 - 247
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (267 KB) | HTML iconHTML

    In this paper we generate diagnostic decision trees for systems that are modeled by dynamic fault trees in order to perform reliability analysis. We base the proposed testing sequence within the diagnostic decision trees on diagnostic importance factors. We derive an approximate diagnostic importance factor measure for components from the Markov chain solution of the dynamic fault tree. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Bob Heinonen of Texas Heros Portrays

    Publication Year: 2004, Page(s): v
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (17 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The down converter - a critical synthetic instrument technology

    Publication Year: 2004, Page(s):422 - 427
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    This paper provides a brief overview of RF/microwave frequency translation functionality (up converters & down converters) and technology and discusses why they are important in the context of DOD related test and measurement. The paper then briefly reviews the concept of synthetic instruments (SI) and the role of the down converter in the SI paradigm. The paper then introduces the reader to some ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Making a choice between an emulator or software migration

    Publication Year: 2004, Page(s):223 - 225
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (135 KB) | HTML iconHTML

    Many current automatic test systems employ legacy computer systems. These systems have software packages that have been proven over years of use. Unfortunately, the hardware for these computer systems is fast becoming unsupportable. The owners of these systems are faced with a choice to either translate the software to work with a modern computer system or replace the legacy computer with an emula... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.