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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  • Systems commonality: integrated avionics for the MH-47E and the MH-60K

    Publication Year: 1991, Page(s):526 - 532
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The program described involves two aircraft: the MH-47E, which is a special modification of the Boeing CH-47D Chinook, and its complement, the MH-60K version of the Sikorsky UH-60L Black Hawk. The author provides an overview of the IBM integrated avionics subsystem (IAS), which extends the communication and navigation capabilities of the Chinook and Black Hawk aircraft by integrating avionics proc... View full abstract»

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  • Kalman filter mechanization for INS airstart

    Publication Year: 1991, Page(s):516 - 525
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    A strapdown mechanization and associated Kalman filter were developed to provide both ground align and airstart capabilities for inertial navigation systems using Doppler velocity and position fixes, while not requiring an initial heading estimate. This is accomplished by use of a Doppler velocity sensor and a position source such as the global positioning system (GPS) manual fly-over update or ta... View full abstract»

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  • A fault-tolerant network architecture for integrated avionics

    Publication Year: 1991, Page(s):281 - 286
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The Army fault-tolerant architecture (AFTA) under construction at the Charles Stark Draper Laboratory is an example of a highly integrated critical avionics system. The AFTA system must connect to other redundant and nonredundant systems, as well as to input/output devices. A fault-tolerant data bus (FTDB) for highly reliable communication between the AFTA computer and other network stations is de... 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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  • 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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  • 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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  • 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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  • An advanced flight path management system for low-altitude helicopter flight

    Publication Year: 1991, Page(s):510 - 515
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Addresses results obtained from development and piloted evaluations of an advanced flight path management (FPM) system prototype and an architecture for its incorporation into the US Army special operations aircraft (ASOA) integrated avionics system (IAS). Prototype implementation, for piloted evaluation in the Flight Simulation Laboratory, made use of IBM PS/2 Model 80 processors with i860 accele... View full abstract»

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  • Achieving fault tolerance in multichannel control systems

    Publication Year: 1991, Page(s):275 - 280
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    The authors present a review of three patented techniques for achieving a very high degree of fault tolerance in avionic multichannel control systems. The first technique involves the synchronization of the redundant channels using a fault tolerant hardware synchronizer. The symmetrization technique involves a unique architecture and algorithms for maintaining identical signals and configurations ... View full abstract»

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  • Design for validation [digital avionics]

    Publication Year: 1991, Page(s):487 - 492
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    Outlines an approach for the development of ultrareliable digital avionics for civil air transports-a design-for-validation philosophy that includes rigorous application of formal methods. The basic concept of the methodology is introduced, and the role of formal methods is explored. System design begins with a detailed description of the system requirements written in a formal, mathematical langu... View full abstract»

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  • Operating principles for integrated sensor processing

    Publication Year: 1991, Page(s):555 - 560
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    Addresses the operating principles applicable to integrated avionics processors. The techniques described have been successfully applied in avionics programs within an integrated standard electronic modules format E (SEM E) heterogeneous multiple processor system. Analysis of avionics applications is blended with ease-of-use, programmability and systems considerations to derive the system principl... 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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  • 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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  • Automatic document generation with CASE on a DOD avionics project

    Publication Year: 1991, Page(s):305 - 310
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    Between December 1989 and June 1991 three major document deliveries were made to a US Navy customer, with all three documents automatically generated from a computer-aided-software-engineering (CASE) database. Some of the most significant improvements made between the June 1990 delivery and the February 1991 delivery are described, to give the flavor of the evolution of the CASE environment. The r... View full abstract»

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  • The data flow simulator, a tool for system simulation

    Publication Year: 1991, Page(s):504 - 509
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    Westinghouse has developed a unique and innovative tool, the data flow simulator (DFS), that directly links software design to a hardware/operation system model that provides detailed information on the execution of the input software application and determines the system performance statistics, including processor utilization, bus utilization, memory utilization, critical transmission paths, oper... View full abstract»

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  • Hardware assisted real-time rollback in the advanced fault-tolerant data processor

    Publication Year: 1991, Page(s):269 - 274
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Rollback recovery offers an efficient method of recovering from transient faults and permanent faults when rollback is combined with spare resource reconfiguration. The hardware macro-rollback technique presented has been implemented in the advanced fault-tolerant data processor (AFTDP), which is a high-performance fault-tolerant shared memory multiprocessor. The architecture discussion focuses on... View full abstract»

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  • Artificial expertise in systems engineering [aerospace systems]

    Publication Year: 1991, Page(s):405 - 410
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The authors present some conceptual applications and examples for implementing artificial expertise in system development. Systems engineering optimization of computer technology applications can eliminate or redesign engineering processes such that the unified system function focuses on innovation, flexibility, speed, and quality. Artificial expertise for system engineering refers to the applicat... View full abstract»

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  • Modeling methods for the design and evaluation of fault-tolerant systems [military systems]

    Publication Year: 1991, Page(s):187 - 192
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The authors describe an approach for using directed graph simulation models, behavioral simulation models, and semi-Markov analytic models to implement early- to mid-design analysis activities specified by the SDIO BM/C3 Processor and Algorithm Working Group. The use of the models was demonstrated for a mission scenario requiring parallel, reliable computations with a maximum probabilit... View full abstract»

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  • PAVE PACE-concepts for sensor integration

    Publication Year: 1991, Page(s):252 - 257
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The authors describe challenges and issues in achieving an integrated sensor suite. PAVE PACE is an initiative in a system avionics for the 21st century. One facet of the program is to explore the integration and architectural concepts that current sensor subsystems are driving towards and assess how future technologies will enable integrated sensor suites to become a reality. The operational requ... View full abstract»

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  • Flight management system back-up navigation for the A330/A340 aircraft

    Publication Year: 1991, Page(s):482 - 486
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    Presents the architecture and functional operation of the multi-purpose control display unit (MCDU) back-up navigation used on the A330/A340 MCDU aircraft. Its purpose and capability in playing a key role on the A330/A340 for providing navigational back-up and equipment redundancy are explored. The A330/A340 flight management system is embedded in two flight management and guidance and envelope co... View full abstract»

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  • Object-oriented design of radar warning receiver application software

    Publication Year: 1991, Page(s):550 - 554
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    Describes an object-oriented approach that is being used to design Ada application software for an airborne radar warning receiver program. The objective is software that can be rapidly reprogrammed by merely changing the database that contains emitter descriptions, instead of changing any code. In addition, the hardware/software interfaces are encapsulated to make it possible to deploy the system... View full abstract»

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  • Tools and techniques for estimating high intensity RF effects

    Publication Year: 1991, Page(s):337 - 342
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The authors describe some of the tools and techniques used for estimating and measuring coupling and component disturbance. A finite difference-time domain (FD-TD) modeling mode code, TSAR (temporal scattering and response), used to predict coupling is described. This code has the capability to quickly generate a mesh model to represent the test object. Some recent applications as well as the adva... 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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  • Feedback amplifiers revolutionize voltage detectors

    Publication Year: 1991, Page(s):62 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A highly accurate multiple-level voltage detector with demonstrated producibility has been developed. Initially designed to meet a required stability of better than ±0.02%/°C, the final circuit achieved the desired goal with a margin of better than one order of magnitude. The circuit exhibits a noteworthy simplicity in that it needs no bias supplies, and requires relatively few parts ev... View full abstract»

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