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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  • 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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  • Automatic programming for rapid development of tracking systems

    Publication Year: 1991, Page(s):544 - 549
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (460 KB)

    The authors discuss an approach, called ATTACK (automated tracking taxonomy and coding knowledge), which uses knowledge-based technologies to support the automated synthesis of new target tracking systems for the investigation of new tracking algorithms. In this approach, users are prompted for tracking system characteristics on a series of dynamic, interactive forms. Design rules are applied to t... View full abstract»

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  • Integrating a radar/ESM antenna suite with the S-70 helicopter

    Publication Year: 1991, Page(s):539 - 543
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (424 KB)

    The underside of the helicopter below the crew cabin was used for the installation of a combination antenna system. Very little clearance is available between the helicopter underside and the ground when accounting for hard landings. A combination of technical approaches were required to install broadband, rotating antennas along with a radar narrowband antenna in these small volumes. All antennas... 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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  • 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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  • 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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  • The army special operations aircraft integrated avionics subsystem-an operational perspective

    Publication Year: 1991, Page(s):533 - 538
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (528 KB)

    The authors focus on integration techniques utilized to enhance an operator interface and contain pilot workload within acceptable levels. The US Army MH-47E and MH-60K special operations aircraft (SOA) provide the capability to perform the Army's clandestine, deep-penetration missions in adverse weather, at night, over any terrain which the aircraft can traverse. The inherent complexity of this m... View full abstract»

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  • MLS/RNAV control display unit development

    Publication Year: 1991, Page(s):331 - 336
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (548 KB)

    The authors describe the process of developing a microwave landing system (MLS)/RNAV control display unit and associated simulation capability for retrofit in older-generation electromechanical aircraft cockpits. Functional specifications, design, development, and fabrication of the control display unit, requirements of a retrofit kit, and installation and integration into a typical phase-II simul... 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Map projections and airborne moving map displays

    Publication Year: 1991, Page(s):493 - 498
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (456 KB)

    The author discusses advantages and disadvantages of several methods of map projection, and identifies two methods that work well at any latitude with any map orientation. Four methods of map projection are discussed: cylindrical equidistant projection, sinusoidal projection, oblique orthographic projection, and oblique azimuthal equidistant projection. There are two modes of map displays, plan mo... 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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  • 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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  • A data coupling paradigm for distributed architectures

    Publication Year: 1991, Page(s):258 - 262
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (476 KB)

    Presents a data coupling mechanism for distributed processing. The system virtual memory (SVM) is a fast-access, read-write, block-oriented memory device, separate from every processing element in the system, responsible exclusively for the retention and retrieval of data. A portion of memory of a specified size can be dynamically allocated and deallocated within the SVM. Once allocated, the memor... 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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  • 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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  • 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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  • 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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  • Angle-only tracking with a MSC filter

    Publication Year: 1991, Page(s):561 - 566
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (432 KB)

    The authors present an implementation of a tracking filter for use with angle-only measurement data, such as for use with IR sensor data, with principle application in an air-to-air multiple-target tracking environment. The implementation is based upon the modified spherical coordinate (MSC) method. Among the implementation issues discussed are: (a) choice of process noise model so as to balance t... 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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