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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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  • Application of digital fiber optics technology to a radar unit-to-unit cable

    Publication Year: 1991, Page(s):446 - 470
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A fiber optic cable replacement to eliminate electromagnetic interference (EMI) in airborne radar unit-to-unit digital cables was designed, built and successfully demonstrated. The cable that was replaced consisted of 44 twisted shielded pair lines which carried digital signals at a maximum effective data rate of 58 MHz between two units within the radar system. A cable replacement consisting of s... View full abstract»

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  • A real-time approach to information management in a pilot's associate

    Publication Year: 1991, Page(s):440 - 445
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    A primary goal of the Pilot's Associate (PA) program is to enhance combat fighter pilot effectiveness by increasing a pilot's situational awareness and decreasing the workload. The Information Manager (IM) supports the pilot by intelligently presenting timely information in an easily interpreted form. The authors describe the requirements which a successful IM must fulfil. Among these are processi... View full abstract»

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  • Automated code generation from graphical, reusable templates

    Publication Year: 1991, Page(s):299 - 304
    Cited by:  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    GE has been developing a tool that allows the user to draw signal block diagrams describing control law processing, and then automate the generation of code for various target languages. To improve coverage of the tool, a graphical method useful for capturing the program structure and control aspects was desired, and is addressed by flowcharts. Within the flowchart structure, subroutine and macro ... View full abstract»

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  • Design and analysis tools for concurrent blackboard systems

    Publication Year: 1991, Page(s):432 - 439
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    A set of blackboard system design and analysis tools that consists of a knowledge source organizer, a knowledge source input/output connectivity analyzer, and a validated blackboard system simulation model is discussed. The author presents the structure and functionality of the knowledge source input/output connectivity analyzer. An example outlining the use of the analyzer to aid in the design of... View full abstract»

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  • Digital flight control systems: some new commercial twists

    Publication Year: 1991, Page(s):79 - 84
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The exponential increase in the number and complexity of aircraft digital electronic systems over the last decade has brought to light a number of fault and failure mechanisms not encountered with traditional mechanical and analog systems. One approach to handling these problems on future commercial aircraft is through the use of integrated modular avionics (IMAs). The issues and concepts associat... View full abstract»

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  • Integrated flight/fire control for attack helicopters

    Publication Year: 1991, Page(s):287 - 298
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The author shows that integrated flight and fire control modes, analogous to those used in fixed-wing applications, can be implemented to enhance an attack helicopter's air-to-air and air-to-ground combat effectiveness. With fly-by-wire active flight controls and state-of-the-art technology in target acquisition and tracking, integrated flight/fire control can increase firing opportunities, improv... 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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  • Verification and validation testing of the Pilot's Associate

    Publication Year: 1991, Page(s):426 - 431
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    The DARPA/USAF/Lockheed Pilot's Associate is a comprehensive and complex real-time artificial intelligence decision aid. The author discusses how the Lockheed team is conducting the verification and validation of the Pilot's Associate as an integrated methodology that brings design and test into a closer relationship. The issues of verification and validation have been addressed as an integral par... 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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  • 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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  • Comparison of centralized and decentralized linear-quadratic-Gaussian path control problems

    Publication Year: 1991, Page(s):68 - 78
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The authors solve centralized and decentralized aerospace control problems explicitly accounting for sensor-to-sensor estimate cross-correlation due to the dynamics model and sensor-to-sensor measurement cross-correlation. A linear multinode network with a quadratic performance criterion was treated. The case of nonstationary measurement noise requires the parallel real-time calculation of interse... 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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  • 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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  • 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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  • Route planning

    Publication Year: 1991, Page(s):420 - 425
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Route planning is discussed as part of an avionics system. A very rapid route planning technique was developed based on the cellular automata (CA) paradigm. A CA consists of a 2-D, 3-D or higher-dimensional grid of cells. Each cell has either a real or virtual processor assigned to it, and communicates with neighboring cells to solve a variety of spatial-temporal problems. The route planner operat... View full abstract»

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  • The space exploration initiative-an information system perspective

    Publication Year: 1991, Page(s):198 - 202
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The authors look at the space exploration initiative (SEI) from an information system perspective and discuss information system definition effort being conducted in support of NASA's Lunar Mars Exploration Program Office (LMEPO) Johnson Space Center (JSC). The development of an integrated, effective SEI information system (SIS) is recognized as crucial to the success of the SEI missions. Some of ... 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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  • 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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  • Testability of the PAALS auto-align sensor system

    Publication Year: 1991, Page(s):381 - 386
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The author addresses the testability design of the precision accelerometer alignment and leveling system (PAALS) auto-align sensor system. The PAALS module is a sensor system for measuring the alignment of avionic packages relative to the system reference axes. PAALS stores the measured alignment parameters in memory as updated by command from the main system computers, and is designed to be co-lo... View full abstract»

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  • Formation flight system design concept

    Publication Year: 1991, Page(s):18 - 25
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    IBM recently completed a baseline design study for a formation flight system to be used for rendezvous, join-up, and formation flight of US Air Force helicopters and fixed-wing aircraft. The baseline system uses a Global Positioning System/inertial navigation system (GP/INS) relative navigation concept with backup data link range measurement as the basis of the precise position location for all ai... 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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  • 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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  • 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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  • 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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