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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  • 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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  • Processor architectures for fault tolerant avionic systems

    Publication Year: 1991, Page(s):213 - 219
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The authors consider the application of modern processor architectures to avionics systems requiring fault masking during critical flight dynamic phases such as ascent or entry. Fault masking implies uninterrupted control during the period of fault detection, identification and recovery (FDIR). To provide this uninterrupted control requires tight coordination between redundant processors. The impa... View full abstract»

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  • Extreme wide field-of-view displays and the enclosed cockpit

    Publication Year: 1991, Page(s):399 - 404
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Recent developments have shown that extreme wide field-of-view (EWFOV) displays are possible and will become the preferred display in future high performance aircraft. Visual perception and novel display option possibilities are discussed. EWFOV displays encompassing at 240°H×120°V field of view are possible. These displays are able to replace the viewer's normal reality with a new r... View full abstract»

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  • Fault tolerant integrated inertial navigation/global positioning systems for next generation spacecraft

    Publication Year: 1991, Page(s):207 - 212
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The authors address the requirements, benefits, and mitigation of risks to adapt a commercial Hexad fault-tolerant inertial navigation/global positioning system (FT IN/GPS) for use in next-generation spacecraft. Next-generation requirements are examined to determine whether a high production base system can meet autonomous, reliable, and low-cost requirements for future spacecraft. The major benef... View full abstract»

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  • Artificial intelligence in the helicopter cockpit of the future

    Publication Year: 1991, Page(s):125 - 130
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The authors describe research in the development of a situation assessment system for use in next-generation US Army helicopters. They first describe the problems faced by attack and scout helicopter pilots when conducting missions at night or under adverse weather conditions. An overall artificial intelligence processing architecture for use in the Army helicopter domain is then described. This p... View full abstract»

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  • An enhanced Ada run-time system for real-time embedded processors

    Publication Year: 1991, Page(s):49 - 55
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    An enhanced Ada run-time system has been developed to support real-time embedded processor applications. The primary focus of this development effort has been on the tasking system and the memory management facilities of the run-time system. The tasking system has been extended to support efficient and precise periodic task execution as required for control applications. Event-driven task executio... 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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  • Fault tolerant avionics for the Space Shuttle

    Publication Year: 1991, Page(s):203 - 206
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The space shuttle uses a digital fly-by-wire control system. If this system were to fail, it would cause certain loss of personnel, payloads, and the vehicle itself. Consequently, an avionics architectural design was chosen that would withstand two failures in any particular subsystem and still provide adequate vehicle control. A total of four primary computers are used to provide safe control of ... View full abstract»

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  • Simulation evaluation of a low-altitude helicopter flight guidance system adapted for a helmet-mounted display

    Publication Year: 1991, Page(s):115 - 124
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    A computer aiding concept for low-altitude helicopter flight has been developed and evaluated in a real-time piloted simulation. The concept included an optimal control trajectory-generation algorithm based upon dynamic programming, and a helmet-mounted display (HMD) presentation of a pathway-in-the-sky, a phantom aircraft, and flight-path vector/predictor guidance symbology. The pilot evaluation ... 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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  • The concept exploration stage of a dependable avionic system

    Publication Year: 1991, Page(s):572 - 576
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The fault tolerant aspects of the evaluations and trade studies done in the concept evaluation stage of a mission avionics system are discussed. These studies are considered from the point of view of the government program office in charge of the RFP, SOW, design review and milestone deliverables. The author touches on some of the possible fault-tolerant specifications, a fault-tolerant evaluation... 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • A new approach to embedded computer performance measurement

    Publication Year: 1991, Page(s):232 - 236
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The authors report on the results of Phase I and options of the advanced avionics technology demonstration (AATD) embedded computer performance measurement (ECPM) program performed by Texas Instruments (TI) for the Naval Avionics Center (NAC). During this effort TI and NAC personnel developed novel techniques for measuring spare throughput and space I/O to be used for comparison of different compu... 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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  • Reconfigurable software development

    Publication Year: 1991, Page(s):499 - 503
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Offers a concept called reconfigurable software to save on software costs. Reconfigurable software is software for real-time embedded systems that is characterized as portable, modular and schedulable. Portability is achieved by use of a high-order language and machine-independent time management. Modularity is achieved using abstract data types. The rate monotonic scheduling theory is used for an... 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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  • 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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  • Aerospace applications of lightwave technology at Hughes

    Publication Year: 1991, Page(s):567 - 571
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Examples of the use of lightwave circuits to partition aerospace-borne systems are presented. The role of lightwave technology in future phase array radar, communication and electronic warfare system architectures is discussed. The status of microwave bandwidth photonic transmitter and receiver circuits operating between 0.1 and 40 GHz is summarized along with the projected impact of the new erbiu... 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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