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Aerospace and Electronics Conference, 1992. NAECON 1992., Proceedings of the IEEE 1992 National

Date 18-22 May 1992

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  • Proceedings of the IEEE 1992 National Aerospace and Electronics Conference, NAECON 1992 (Cat. No.92CH3158-3)

    Publication Year: 1992
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    Freely Available from IEEE
  • Electro-optic systems research using the variable parameter FLIR

    Publication Year: 1992, Page(s):1263 - 1267 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    An efficient and cost-effective approach to electrooptic systems research is to investigate system concepts and sensor components on a generic testbed that can be readily modified for a variety of applications. The variable-parameter FLIT is a research and development testbed for evaluating systems concepts, testing sensor components, and providing benchmark data for model and figure-of-merit vali... View full abstract»

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  • A comparison of free space and fiber mixer performances in a heterodyne laser radar

    Publication Year: 1992, Page(s):1256 - 1262 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The author compares the signal-to-noise ratio at the IF stage of a heterodyne laser radar receiver using the traditional free space mixer with the IF CNR from a heterodyne laser radar receiver using a fiber mixer stage. The comparison indicates the fiber mixer will generally under-perform the free space mixer unless the f-numbers of the receiver optics and the single-mode fiber are approximate mat... View full abstract»

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  • An ultrahigh-speed large capacity radar data acquisition system

    Publication Year: 1992, Page(s):172 - 174 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    An ultrahigh-speed large capacity radar data acquisition system has been developed. This system achieves 150 MSPS (mega samples per second). The acquisition system also includes a high-speed 512 k×8 bit data buffer memory which is useful in longtime data acquisition applications such as radar signal acquisition and wideband noise analysis. The data can be transferred to the computer through ... View full abstract»

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  • System for the management of digital threat models

    Publication Year: 1992, Page(s):774 - 780 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    The US Air Force Foreign Aerospace Science and Technology Center (FASTC) is in the midst of expanding its threat assessment process to include intelligence products based on digital threat models. While this expansion involves a broad spectrum of developmental activities, the emphasis is on building an operational prototype of a retooled threat assessment support environment (TASE). The authors de... View full abstract»

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  • Use of time varying dynamics in neural network to solve multi-target classification

    Publication Year: 1992, Page(s):414 - 420 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    Several types of solutions exist for multiple target tracking. These techniques are computation-intensive and in some cases very difficult to operate online. The authors report on a backpropagation neural network which has been successfully used to identify multiple moving targets using kinematic data (time, range, range-rate and azimuth angle) from sensors to train the network. Preliminary result... View full abstract»

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  • Reverse engineering `a new definition for the nineties'

    Publication Year: 1992, Page(s):1213 - 1219 vol.3
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1312 KB)

    Reverse engineering defines a method where rapidly made copies of complex surfaces can be generated using noncontact optical and direct surface contact system probes. With the development of 3D CAD modeling, 3D digitizing, and rapid prototyping, the application of optical scanning using laser and Moire pattern techniques has hastened the market of reverse engineering. 3D modeling digitalization, a... View full abstract»

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  • Reconfigurable processor arrays with two-track switches

    Publication Year: 1992, Page(s):434 - 440 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    To improve fabrication-time yield for processor arrays, spare processors and switching lattices are often incorporated, especially when each array contains a large number of processors. A routing algorithm for arrays with two horizontal routing tracks and two vertical routing tracks is proposed. Although the array has a smaller number of tracks than that used by other researchers, it is shown that... View full abstract»

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  • Circuit models of PWM DC-DC converters

    Publication Year: 1992, Page(s):407 - 413 vol.1
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    A systematic method is presented for including parasitic resistances and offset voltage sources of power switches into averaged dynamic large-signal, DC, and small-signal circuit models of PWM converters operating in continuous conduction mode. This method is based on the principle of energy conservation. It is shown that the equivalent circuits can be manipulated, using the reflection rule, to si... View full abstract»

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  • Computer-aided design of avionic diagnostics algorithms

    Publication Year: 1992, Page(s):948 - 954 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Describes the application of a computer-aided design tool developed to complement an alternative approach to diagnostics design using the failure signatures or syndromes. The computer-aided design tool can analyze fault-tolerant architectural networks, provide network design guidance, and generate syndrome data for inclusion in the embedded software diagnostic algorithms. The tool accepts as input... View full abstract»

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  • Analysis of planar microstrip discontinuities in MMIC's

    Publication Year: 1992, Page(s):1274 - 1280 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Planar microstrip discontinuities are analyzed by the full-wave, space-domain moment method at microwave and millimeter wavelengths. Redundant calculations in the moment matrix are eliminated by utilizing various symmetries. At lower microwave frequencies quasi-static approximations are invoked to simplify the analysis. Sample computed results are presented for the current distribution and the View full abstract»

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  • A large-area flat panel multi-function display for military and space applications

    Publication Year: 1992, Page(s):1242 - 1248 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The Collins Avionics and Communications Division (CACD) of Rockwell International is developing a flat panel multifunction display (MFD) for military and space applications. The MFD offers the size and reliability benefits of liquid crystal display technology while achieving near-CRT display quality. CACD's experience in cockpit display systems has resulted in display generation algorithms that pr... View full abstract»

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  • A taxonomy of neural network optimality

    Publication Year: 1992, Page(s):894 - 899 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The authors discuss some of the criteria which can be used to decide when one network topology is better than another. The focus is on neural networks which generate their topology during training. The taxonomy presented can be used to determine methods for comparison of different neural network paradigms. The criteria for determining what is an optimum network is highly application specific. The ... View full abstract»

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  • Performance characteristics of range sensors utilizing optical triangulation

    Publication Year: 1992, Page(s):1230 - 1236 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    Many of the performance characteristics of triangulation sensors are obvious, but others are more subtle and do not appear to have been examined in the open literature. The authors examine these characteristics in detail. One aspect was to compare results obtained with a conventional touch trigger probe and a laser triangulation sensor when they are used in a reverse engineering situation. Another... View full abstract»

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  • A dual-port DRAM component for a digital RF memory

    Publication Year: 1992, Page(s):85 - 89 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The design and testing of a dual-port dynamic memory component for a digital radio frequency memory (DRFM) are described. The use of dynamic memory allows for greater storage capacity than the static memory. In addition, the dual-port nature of the memory allows for access by an external processor. The external processor may be used for signal processing applications such as parameter extraction. ... View full abstract»

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  • The role of paperless manuals and integrated diagnostics in improving maintenance

    Publication Year: 1992, Page(s):985 - 993 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    The author presents two models of the conditions affecting maintenance. It is shown that maintenance conditions act to degrade diagnosis to a much greater extent than they degrade non-troubleshooting (NTS) maintenance. A detailed examination of diagnosis and NTS maintenance indicated that the difference in the conditions' impact is caused by properties of decision-making and the large amount of de... View full abstract»

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  • A method of aimpoint selecting for unsymmetric and structure-branching targets

    Publication Year: 1992, Page(s):363 - 368 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    A shape analysis method for target images is presented. It can be used for aimpoint selection in missile homing. The method is based on the discrete medial line transformation. The medial lines which describe the skeleton of the target image are extracted, so that the exact graph description of the target image shape can be achieved. The most effective connection part of the branches of the target... View full abstract»

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  • A covariance analysis technique for the federated Kalman filter

    Publication Year: 1992, Page(s):399 - 406 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A covariance analysis technique for the federated Kalman filter based on suboptimal system models is described. A review of the federated filter is given. Performance techniques for suboptimal filters are reviewed and extended to apply to the federated filter. A simple example is provided to demonstrate the technique. The results are compared with those from a Monte Carlo simulation for validation... View full abstract»

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  • Improved trinary associative memory for character recognition

    Publication Year: 1992, Page(s):905 - 909 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    Character recognition by a trinary associative memory (TAM) neural network model is investigated. Three different inner product thresholding schemes, namely, zero plus average thresholding, arithmetic mean thresholding, and a novel adaptive thresholding are examined. It was shown by a simulation that the novel threshold prescription scheme with the permanent inhibition scheme enhanced the converge... View full abstract»

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  • Analysis of false alarms during system design

    Publication Year: 1992, Page(s):657 - 660 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    It is noted that the problem of false alarms in electronic monitoring systems has grown over the last decade. This growth has been associated with increasing system complexity and advances in the state of the art. Studies have shown that some systems exhibit as many as 40% or more false pulls, and, associated with the false-alarm problem a large volume of wasted or ineffective maintenance actions ... View full abstract»

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  • Getting a handle on designing for avionics software supportability and maintainability

    Publication Year: 1992, Page(s):944 - 947 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The author addresses the acquisition, logistics, and use of avionics software by showing cases of avionics software supportability and maintainability and the design methodology. He defines supportability and maintainability and gives an idealistic example of a strongly designed supportable and maintainable futuristic fighter. The state of supportability and maintainability today is reviewed. The ... View full abstract»

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  • Resonant sensors for high accuracy pressure measurement using silicon technology

    Publication Year: 1992, Page(s):349 - 355 vol.1
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    A resonant element transducer has been developed for aerospace applications using micromachined silicon technology. The sensor is a beam supported over a square diaphragm. The resonant frequency of the beam is proportional to the applied pressure on the diaphragm. The authors describe the process of sensor construction, report on its physical characteristics, and summarize the performance evaluati... View full abstract»

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  • The Pave Pace Integrated Core Processor

    Publication Year: 1992, Page(s):806 - 814 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    The signal and data processor in the Pave Pace architecture, the Pace Pace Integrated Core Processor (ICP), is described. Technology and architectural innovations were primarily used to improve reliability, maintainability, survivability, affordability, weight, and volume. In addition, turn-of-the-century avionics applications require that the ICP must be able to provide >20 GLOPS and >750 M... View full abstract»

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  • The study and development of combined artificial intelligence architectures to solve important problems in computer vision

    Publication Year: 1992, Page(s):867 - 871 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The author proposes a number of architectures for continued development of intelligent computer vision systems. He describes an approach to developing computer vision systems which will include the development of an overall system based on three parts. First, aspects of human and computer vision, and intelligence are studied. The second part of the project is the development of artificial intellig... View full abstract»

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  • Detection of radar signals using Gabor transform and neural network

    Publication Year: 1992, Page(s):916 - 922 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The detection of a one-dimensional radar signal is attempted by using the Gabor transform and artificial neural networks (ANNs). The Gabor transform scheme is a conjoint spatial/spectral transform, which provides a complete signal description in terms of locally windowed 1-D spectral coordinates. The neural network detector of a radar signal is quite effective because of its good learning properti... View full abstract»

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