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Proceedings of the IEEE 1997 National Aerospace and Electronics Conference. NAECON 1997

14-17 July 1997

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  • IEEE 1997 National Aerospace and Electronics Conference NAECON 1997

    Publication Year: 1997, Page(s):0_3 - ix
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    Freely Available from IEEE
  • Training-based SLM-realizable composite filter design

    Publication Year: 1997, Page(s):785 - 791 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Majority-granted nonlinearity-based training for the synthesis of a composite filter is proposed. The motivation is the limited modulation capability of the spatial light modulator (SLM) which is incorporated as a design constraint in the form of a simple thresholding scheme. The technique is simple, and less computationally extensive nevertheless resulting in a robust enough SLM-realizable distor... View full abstract»

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  • A new methodology for reducing brittleness in genetic programming

    Publication Year: 1997, Page(s):757 - 763 vol.2
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    Genetic programming systems typically use a fixed training population to optimize programs according to problem-specific fitness criteria. The best-of-run programs evolved by these systems frequently exhibit optimal (or near-optimal) performance in competitive survival environments explicitly represented by the training population. Unfortunately, subsequent performance of these programs is often l... View full abstract»

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  • Integrating multimedia information for joint theater command and control

    Publication Year: 1997, Page(s):724 - 731 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    The modern command center must support force-level data fusion (the integration and display of information from a range of sources) to meet the needs of contingency operations. The effectiveness of the information use depends upon improving the integration of information processing capabilities with the cognitively-demanding team planning and decision making tasks of the joint force senior command... View full abstract»

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  • Generation of object-oriented formal software specifications

    Publication Year: 1997, Page(s):660 - 667 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The ability to provide automated support for the generation of formal software specifications would lead to decreased software development time. By eliciting the needed information from a software developer and harvesting the proper parts of a domain model, a software specifications document can be created. This research establishes the feasibility of producing customized software specifications b... View full abstract»

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  • The design of a PC-based, low-cost radar video signal generator

    Publication Year: 1997, Page(s):544 - 551 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    In the field of electronic warfare (EW), the development, test, validation, and debugging of radar warning receiver (RWR) hardware and software in the laboratory necessitates the simulation of radar threat signals. This requirement often leads to the development of expensive, high-fidelity, radio frequency (RF) simulators. Because they are expensive, they are scarce. They are also often hard to co... View full abstract»

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  • Unbiased converted measurements for target tracking

    Publication Year: 1997, Page(s):1039 - 1041 vol.2
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    The accurate debiasing processing for the bias in the classical conversion mainly depends on the first and second statistics of the cosine of the bearing measurement errors. An unbiased conversion is presented in this paper. Some comparison between the new unbiased conversion with the previously offered debiased conversion is made View full abstract»

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  • A new evolutionary computation method

    Publication Year: 1997, Page(s):803 - 807 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A real-valued genetic algorithm is proposed to the optimization problem with continuous variables. It is composed of a simple and general-purpose dynamic scaled fitness and selection operator, real-valued crossover operator, mutation operators and adaptive probabilities for these operators. The proposed algorithm is tested by two generally used functions and is applied to the training of a neural ... View full abstract»

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  • Pneumatic cylinder trajectory tracking control using a feedforward multilayer neural network

    Publication Year: 1997, Page(s):777 - 784 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Pneumatic cylinders are used in many industrial applications to position loads using a rectilinear motion. Currently, pneumatic cylinders are limited to a narrow range of applications because their motion trajectory is difficult to control. Conventional linear control methods can not compensate for both the nonlinear flow of compressed air and the internal friction present in the cylinders. Multil... View full abstract»

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  • Evolving engineering mission schedules: a machine-learning approach to scheduling

    Publication Year: 1997, Page(s):749 - 756 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    Scheduling is frequently a militarily significant procedure. In a battlefield environment, it is often important to have access to rapid scheduling techniques that produce effective and efficient schedules. Standard approaches to scheduling may be ineffective whenever the characteristics of the schedule to be generated-its size, its complexity, interactions among its components, etc.-make it diffi... View full abstract»

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  • Experiments in software reengineering

    Publication Year: 1997, Page(s):683 - 689 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    Program restructuring is frequently part of software reengineering and maintenance activities. There are several goals: reduce future system life cycle costs and improve quality by reducing software faults. An important sub goal is to reduce the number of non-traversable program execution paths. The conjecture is that non-traversable execution paths make programs hard to understand and maintain. U... View full abstract»

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  • Bandwidth allocation for real-time communication with LTPB protocol

    Publication Year: 1997, Page(s):920 - 925 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The LTPB (Linear Token Passing Bus) protocol is a timed token protocol which has been designed by the SAE (Society of Automotive Engineers) as a LAN standard (AS4074) to support real-time communication in mission-critical systems. This paper studies the real-time characteristics with LTPB network. A bandwidth allocation scheme is proposed based on the traffic load balance of each node. The necessa... View full abstract»

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  • An improved approach to the mutual coupling calculation of conformal array

    Publication Year: 1997, Page(s):873 - 877 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    This paper presents the general expressions of the mutual coupling from waveguide antenna elements on conformal surfaces. Based on direct integration method (DIM) and surface radiation pattern method (SRP), a novel improved surface radiation pattern (ISRP) method is suggested to the calculation of the mutual coupling. The results for the cylinder indicate that ISRP is more accurate than SRP and mo... View full abstract»

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  • On modeling the query processing-relevant complexity of 2-D spatial objects

    Publication Year: 1997, Page(s):716 - 723 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    We present a conceptual framework for looking at query processing oriented complexity measures for spatial objects. We look at benefits that could result from development of such a measure. While Brinkhoff et. al. (1995) presented a complexity measure, they did not offer much theoretical justification for their choice of parameters nor for the functional form that they used View full abstract»

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  • Locating forward opportune landing sites using spectral images from satellites

    Publication Year: 1997, Page(s):651 - 658 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    The ability of future combat airlifters to deliver cargo into short, austere opportune landing sites which are very close to operating field units is expected to greatly improve the effectiveness of the US warfighter. The use of spectral image data from satellites such as EarthWatch as the medium for identifying opportune landing sites is described. Ball Aerospace and Technologies Corp. (BATC) per... View full abstract»

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  • Xs-MET, a reduced complexity fabrication process using complementary heterostructure field effect transistors for analog, low power, space applications

    Publication Year: 1997, Page(s):622 - 629 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    The requirements for space-based integrated circuit applications are defined with an emphasis on being radiation tolerant and low power consuming. Flexible analog signal processors (FASPs) are outlined as a means by which effective circuit designs can be utilized to perform a multitude of tasks. The development of complementary III-V technologies have been proven to meet the demands of the space e... View full abstract»

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  • An open core rotator design methodology

    Publication Year: 1997, Page(s):594 - 601 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    In low earth orbit [LEO] satellite applications, spacecraft power is provided by photovoltaic cells and batteries. To overcome battery shortcomings, FARE, Inc., working in cooperation with the University of Maryland [UOM] and the NASA Lewis Research Center, has developed an open core magnetically-suspended graphite-epoxy flywheel for energy storage applications. This flywheel energy storage system... View full abstract»

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  • Standard multispectral environment and effects model (STMEEM)

    Publication Year: 1997, Page(s):536 - 543 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    The Joint Modeling And Simulation System (JMASS) is a Modeling and Simulation (M&S) system which provides a software architecture for the development, execution and post-processing of simulations. Additionally, it implements a set of standards by providing tools that assist in development and application of reusable models and model components. The JMASS program is at a critical program milest... View full abstract»

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  • Passive location of fixed emitter using additional navigation information

    Publication Year: 1997, Page(s):1034 - 1038 vol.2
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    Passive location is the determination of the position of an emitter from the available information obtained from the electromagnetic radiation. It is difficult for traditional measurements such as DOA only to determine the position of emitter quickly and accurately. How to make use of the available information from electromagnetic radiation is the key to improve the quality of passive location. A ... View full abstract»

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  • Fuzzy logic in aperture integration schemes for ray traced fields from cavities

    Publication Year: 1997, Page(s):798 - 802 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    In this novel approach, the exiting field distribution inside the ray tube is not considered constant anymore. In fact the field inside the exiting tube is reshaped to resemble a trapezoidal distribution (fuzzy distribution) and its cross section adjusted by taking into consideration the frequency of the wave, length of travel and the number of reflections that each tube undergoes. Results obtaine... View full abstract»

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  • Learning sensor-detection policies

    Publication Year: 1997, Page(s):769 - 776 vol.2
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    Tactical aircraft pilots frequently perform complex sequential support tasks to obtain accurate and timely integrated sensor information about the local environment. When workloads are heavy, offloading these sensor-support tasks to an automated sensor management system would enhance performance and situational awareness. Reinforcement learning, a family of machine learning techniques, offers a wa... View full abstract»

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  • Impact analysis and change management for avionics software

    Publication Year: 1997, Page(s):740 - 747 vol.2
    Cited by:  Papers (8)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1476 KB)

    We have developed a prototype software impact analyzer that supports the maintenance of avionics software. The prototype helps maintain the complexity of software over time, decrease the learning curve for new maintainers, and control the increasing test and maintenance burden. It achieves this by providing hyperlinked views of software structure that increase software understanding, indicating th... View full abstract»

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  • Object-oriented design techniques applied to an integrated support station

    Publication Year: 1997, Page(s):676 - 682 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    As technologies change, it often becomes necessary to upgrade large hardware/software multiprocessor-based systems. System upgrades are desirable because they can provide enhancements such as graphical user interfaces (GUI), increased system integrity, and improved software reliability. This paper discusses the application of object-oriented design techniques in the upgrade of the ALM-172A and ALM... View full abstract»

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  • The PACES digital engagement model

    Publication Year: 1997, Page(s):559 - 563 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    This paper describes the Passive and Active Countermeasures Evaluation Simulation (PACES). PACES is best characterized as an engineering level digital engagement model used to study the effectiveness of electronic countermeasures and aircraft maneuvers against threat radar and missile systems. A typical scenario consists of one or two maneuvering aircraft deploying electronic countermeasures (ECM)... View full abstract»

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  • Recognizing and tracking airport runway target in infrared images

    Publication Year: 1997, Page(s):1045 - 1051 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    In this paper, we show how to detect the airport runway target and how to recognize and track it. Therefore we present an edge sharpening method based on Sobel and Robert operators to detect the runway from the complicated background. Then we use certain characteristics to recognize it and implement effective tracking for it View full abstract»

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