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IEEE/AIAA 10th Digital Avionics Systems Conference

14-17 Oct. 1991

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Displaying Results 1 - 25 of 95
  • High performance heat sink for surface mount applications

    Publication Year: 1991, Page(s):153 - 157
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Surface-mounted electronic module configurations are sensitive to thermal cycling because the reduced compliance between the component and module increases the thermally induced strain in the solder joint. Providing a thermal match between the component and the module reduces this strain, reduces low-cycle fatigue damage, and increases solder joint life. One way of achieving this thermal match is ... View full abstract»

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  • JIAWG module fault coverage metrics methodology

    Publication Year: 1991, Page(s):175 - 180
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The authors discuss the results of a Joint Integrated Avionics Working Group (JIAWG) evaluation of diagnostics initiative (JEDI) which is addressing the problem of accurately predicting and measuring fault detection, fault isolation, and other parameters of vendors' diagnostic designs. The JEDI program developed the metrics, methodology, and data package needed for the government to evaluate digit... View full abstract»

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  • The Office of Naval Research initiative on ultradependable multicomputers and electronic systems

    Publication Year: 1991, Page(s):170 - 174
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The US Office of Naval Research initiative in ultradependable multicomputers and electronic systems is focused on the development of novel techniques for achieving high dependability in parallel and distributed systems. Some of the approaches being funded through the initiative and their role in the program as a whole are surveyed. The objective of the program is to achieve greater effectiveness a... View full abstract»

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  • Next-generation avionics packaging and cooling `test results from a prototype system'

    Publication Year: 1991, Page(s):164 - 169
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The author reports on the design, material characteristics, and test results obtained under the US Air Force's advanced aircraft avionics packaging technologies (AAAPT) program, whose charter is to investigate new designs and technologies for reliable packaging, interconnection, and thermal management. Under this program, AT&T Bell Laboratories has completed the preliminary testing of and is e... View full abstract»

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  • Progressive avionics packaging technologies

    Publication Year: 1991, Page(s):158 - 163
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The author describes technologies that address the packaging, cooling, and interconnect concerns for avionics that are applicable to current aircraft and future weapon platforms, as well as retrofit systems. To meet added functional requirements, electronic devices must shrink to allow more devices on a module and to allow processing/interconnection speeds to increase. This however, produces a tre... View full abstract»

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  • The effect of multiprocessor architectures on Ada application software development

    Publication Year: 1991, Page(s):43 - 48
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    The authors present the results of an analysis of the effects of multiprocessor run-time issues on Ada application software development directed toward concurrent hard real-time applications. Four areas are analyzed with respect to multiprocessor run-time issues: scheduling, process synchronization memory, and system fault tolerance. Current Ada support for concurrent execution is described and th... View full abstract»

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  • Avionics systems engineering education

    Publication Year: 1991, Page(s):110 - 114
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The Rockwell International-Collins Avionics Divisions are developing an avionics systems engineering graduate program with Iowa State University. The author discusses the proposed curriculum and the four avionics systems engineering courses that will be offered. The four courses are: Systems Engineering and Analysis, Avionics Systems Engineering, System Project Management, and Software Systems Eng... View full abstract»

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  • Is the avionics system of the Hermes Spaceplane centralized or decentralized?

    Publication Year: 1991, Page(s):38 - 42
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The avionics system of Hermes is called spacionics. Spacionics is defined as a set of onboard items which treat, exchange, or store information in electrical form, and provide and distribute electrical power. The main drivers for spacionics design are mass and safety. The spacionics organization depends on the priorities assigned to different criteria. These priorities can lead to either a central... View full abstract»

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  • Computer software in civil aircraft

    Publication Year: 1991, Page(s):324 - 330
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    Airborne software is only one element of an aircraft's systems, and only one element of the aviation software environment. Consequently, it cannot be considered in isolation. Airborne software, is used where its benefits outweigh its advantages, notably to improve human factors, which are involved in most aircraft accidents. The timescales extend over many decades, and involve a large number of su... View full abstract»

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  • Logic flowgraph methodology: a tool for modeling embedded systems

    Publication Year: 1991, Page(s):103 - 109
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    The logic flowgraph methodology (LFM), a method for modeling hardware in terms of its process parameters, has been extended to form an analytical tool for the analysis of integrated (hardware/software) embedded systems. In the software part of a given embedded system model, timing and the control flow among different software components are modeled by augmenting LFM with modified Petri net structu... View full abstract»

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  • Liquid cooled approaches for high density avionics

    Publication Year: 1991, Page(s):147 - 152
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1124 KB)

    Next-generation aircraft will require avionics that provide greater system performance in a smaller volume. That requires highly developed thermal management techniques. To meet this need, a liquid-cooled approach has been developed to replace the conventional air-cooled approach for high-power applications. Liquid-cooled chassis and flow-through modules have been developed to limit junction tempe... View full abstract»

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  • A DSP-based microwave landing system (MLS) post-IF processor

    Publication Year: 1991, Page(s):351 - 361
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    The authors describe the digital signal processor (DSP)-based implementation of the microwave landing system's (MLS's) post-IF processing functions. An MLS overview, the DSP-based post-IF processing module and MLS post-IF processing algorithms are discussed. All MLS post-IF processing functions, including carrier acquisition, differential phase shift keying (DPSK) demodulation and synchronization,... View full abstract»

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  • Preliminary design results of a fault-tolerant launch vehicle guidance system

    Publication Year: 1991, Page(s):32 - 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Papers by M. Fernandez and D.A. Tazartes (9th Digital avionics Syst. Conf., Oct. 1990) and by D.A. Tazartes and J. Mark (9th Digital Avionics Syst. Conf., Oct. 1990), which addressed the topics of requirements architecture and implementation, provided the basis for the design of a fault-tolerant launch vehicle guidance and control system. It was stated in the two papers that the recommended fault-... View full abstract»

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  • Development and use of concurrency abstractions for discrete-event simulation

    Publication Year: 1991, Page(s):317 - 323
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    The concern here focuses on developing concurrency abstractions that can readily serve, without modeling compromises or structural awkwardness, in a variety of simulation programs. In this scheme, each concurrency abstraction is implemented as an Ada generic package that exports a task type, thereby enabling the instantiation of multiple task objects. A systematic method of expressing and developi... View full abstract»

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  • Fault tolerant avionics display system

    Publication Year: 1991, Page(s):393 - 398
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Discusses the fault-tolerant requirements of avionics display systems, and an open architecture which permits implementing these requirements. The fault tolerant requirements include the classes of hardware and software faults. Within each class, the requirements are broken down into fault types the system must tolerate. The designers of both hardware and software must develop and integrated appro... View full abstract»

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  • An evaluation of a DO-178A software development process

    Publication Year: 1991, Page(s):97 - 102
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The guidance and control software experiment is an effort to generate realistic software failure data by developing three implementations of a guidance and control software application according to the Radio Technical Commission for Aeronautics RTCA/DO-178A guidelines. The purpose of the software is to provide real-time guidance and engine control for a planetary landing vehicle during its termina... View full abstract»

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  • An ultrareliable integrated digital computer for helicopters

    Publication Year: 1991, Page(s):137 - 146
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    The US Army Fault-Tolerant Architecture (AFTA) has been defined to meet real-time fault-tolerant processing requirements of future Army applications. AFTA is the enabling technology that will allow the Army to configure existing processors and other hardware to provide the high throughput and ultrahigh reliability necessary for terrain-following/terrain-avoidance and nap-of-the-earth flight contro... View full abstract»

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  • Are we doing HIRF testing sensibly?

    Publication Year: 1991, Page(s):346 - 350
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    The author presents observations on a simplified and cost-effective HIRF certification procedure for aircraft and avionics systems. The objective of performing avionics system tests at the bench level as embodied in the RTCA DO-160 test procedures and at the aircraft level as in the new HIRF advisory circular is an attempt to perform meaningful tests of these systems. The premise is if the system ... View full abstract»

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  • Space application of airborne common modules

    Publication Year: 1991, Page(s):26 - 31
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    It is shown that, with some early planning, common electronics modules designed for combat aircraft can be used in space applications. It is shown that architectures, made up of common modules, can be constructed in a manner that resolves reliability, safety, environmental and cost concerns. Growth path and capability are shown for near-term projects (heavy launch vehicle) through far-term (manned... View full abstract»

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  • The Catalyst software engineering environment

    Publication Year: 1991, Page(s):311 - 316
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The Catalyst software engineering environment provides a workstation-based approach which gives language-independent support for software requirements analysis and software preliminary design activities; it then narrows its scope to the support of Ada and C specific implementation work for the rest of the life cycle. Catalyst provides a set of loosely integrated tools which assist project members ... View full abstract»

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  • Crew system engineering methodology: process and display requirements

    Publication Year: 1991, Page(s):387 - 392
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The US Navy's Advanced Technology Crew Station (ATCS) Program was established to develop, demonstrate, and validate a crew systems engineering method that will achieve effective integration of aircrew and technologies within the aircraft system. The authors discuss the ATCS program, the crew systems engineering methodology and the derivation of display requirements within the methodology. The engi... View full abstract»

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  • Mission generation system (MGS): an application of Shlaer-Mellor's object-oriented method

    Publication Year: 1991, Page(s):91 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The McDonnell Douglas Missile Systems Company guidance software group selected the object-oriented analysis of S. Shlaer and S.J. Mellor (1988, 1989) for engineering the requirements of a mission generation system (MGS). Shlaer-Mellor object-oriented analysis is based on building three types of formal models: information, state and process. The authors focus on the guidance software group's succes... View full abstract»

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  • Inertial navigation sensor integrated motion analysis for obstacle detection

    Publication Year: 1991, Page(s):131 - 136
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The authors describe a maximally passive system for obstacle detection and avoidance designed for military rotorcraft, which benefits from the use of inertial data. The sensor options are briefly discussed, and sensor fusion needs are mentioned. Some critical system requirements and their effect on system implementation are discussed. In addition, high-level system implementation issues are presen... View full abstract»

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  • Low cost HIRF troubleshooting and verification method for digital avionics systems

    Publication Year: 1991, Page(s):343 - 345
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    In the second phase of DO-160 C, Section 20 HIRF type testing, the EUT (equipment under test) is subjected to RF fields in the range 30 MHz-(1.215 or 18 GHz), by radiating the EUT with antenna generated fields. Design engineers are concerned about the high cost of testing to 200(+) V/m. An alternate approach, using 10-15-W amplifiers, a signal generator, and a hand held probe is presented. The tot... View full abstract»

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  • Utility management system for hypersonic vehicles

    Publication Year: 1991, Page(s):1 - 5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The authors discuss the issues involved in developing a utility management system (UMS) for hypersonic vehicles. Hypersonic vehicles require that the vehicle subsystems be highly integrated to minimize weight. This integration of the subsystems also makes the most efficient use of consumables. Consequently, a highly integrated, yet distributed, set of controls is required to manage these subsystem... View full abstract»

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