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Telesystems Conference, 1991. Proceedings. Vol.1., NTC '91., National

26-27 March 1991

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Displaying Results 1 - 25 of 67
  • NTC '91. National Telesystems Conference Proceedings. Vol.1. (Cat. No.91CH3010-6)

    Publication Year: 1991
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    Freely Available from IEEE
  • A 2 K*2 K high resolution display and graphics workstation for air traffic control applications

    Publication Year: 1991
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (55 KB)

    Summary form only given. The authors describe the Chromatics MX2500 monitor, a cost-effective large-screen cathode ray tube (CRT) display that will serve as the platform for applications that contain large amounts of data and require ultrahigh resolution. It is a display medium that will support the increasing demand for improved man/machine visual interface. The MX2500 monitor is designed to be c... View full abstract»

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  • Two- and three-dimensional radar imaging at close range to a synthetic aperture

    Publication Year: 1991
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    Summary form only given. Lincoln Laboratory is developing an ultra-wideband imaging radar that will be capable of two- and three-dimensional imaging at very close range to a synthetic aperture. The radar is fully coherent over two bandwidths (0.1 to 2 GHz and 2 to 18 GHz) and will be used for target imaging at X and Ku band, and for foliage penetration measurements over the VHF, UHF, and L bands. ... View full abstract»

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  • Unmanned Ground Vehicle control technology

    Publication Year: 1991
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (79 KB)

    Summary form only given. The US Army Tank-Automotive Command (TACOM) is support of the Department of Defense (DOD) Unmanned Ground Vehicle (HGV) program is executing an evolutionary program leading to intelligent UGV mobility and mission performance. The UGV Control Testbed (UGVCT) is the focus of TACOM research efforts, providing an incubator/field laboratory for the evolution and evaluation of a... View full abstract»

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  • A software tool for precision munition control design

    Publication Year: 1991, Page(s):25 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Using and maintaining digital simulations representing detailed motion and performance prediction for missile systems are often hindered by the model's own complexity. Additionally, varying hardware platforms, operating systems, and design languages account for a large amount of diversity and non-standardization among munition models. The retrofitting of these mainframe-based models with a non-int... View full abstract»

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  • Mu control of aircraft in windshear

    Publication Year: 1991, Page(s):19 - 24
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Using H-Infinity/μ control analysis and synthesis methods, a first-order controller is derived for aircraft flight through moderate to severe windshear. It satisfies robust performance as well as robust stability requirements for a constructed linearized uncertain system containing two repeated scalar uncertainties due to changes in dynamic pressure and angle of attack. Results of applying the ... View full abstract»

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  • Control of an omni-directional robotic vehicle with Mecanum wheels

    Publication Year: 1991, Page(s):323 - 328
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The authors explore three aspects of the Mecanum wheeled vehicles, the ability to maneuver in congested spaces, the kinematics of wheel design, and considerations for wheel loading and traction. It is shown how omni-directional capability greatly reduces the amount of area and time required for maneuvers, and how the Mecanum wheel in particular reduces time because of the absence of singularities.... View full abstract»

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  • Digital aircraft flight controls design using output feedback

    Publication Year: 1991, Page(s):13 - 18
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    An approach that uses linear quadratic output feedback techniques is given for designing digital control systems of specified structure for shaping the closed-loop step response. This approach results in digital controllers that take advantage of the wealth of experience in aircraft controls design. The correct initial conditions for determining the output-feedback gains are not uniformly distribu... View full abstract»

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  • Development of rapid runway repair (RRR) telerobotic construction equipment

    Publication Year: 1991, Page(s):321 - 322
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    The nature of the RRR mission requires that construction/repair equipment operators be placed in positions that could result in death or bodily harm to the operators. Additionally, the possibility of early loss of trained equipment operators leads to the problem of poor machine performance and consequent unacceptable increases in runway repair times. To overcome these problems the US Air Force is ... View full abstract»

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  • An alternate optimal formulation for robust eigenstructure assignment

    Publication Year: 1991, Page(s):7 - 11
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    An alternative eigenstructure assignment formulation which has inherent advantages over a previous formulation is introduced. A highly nonlinear performance index has been replaced by a quadratic one at the expense of an increase in the nonlinearity and number of constraints. Overall, the present formulation presents a significantly simpler problem from a numerical optimization viewpoint. Addition... View full abstract»

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  • Novel array-feed distortion compensation techniques for reflector antennas

    Publication Year: 1991, Page(s):151 - 156
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Results of conceptual developments, numerical simulations, and measurement verifications for array feeds are presented in support of their use as a compensating device for reflector antenna surface distortions. Representative data are presented to provide guidelines for the implementation of the array-compensation concept. Both the numerical and experimental data have demonstrated that, for some t... View full abstract»

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  • The advanced cockpit environment: computer image generation systems and flat panel displays

    Publication Year: 1991, Page(s):59 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    Trends concerning real-time, high-quality airborne 3D computer image generation systems and flat panel displays are reviewed. It is pointed out that the rapid trend toward the use of full-color display devices and raster graphics image generation systems in the cockpit is in part due to advances in sensors, programmable graphics generators, and electrooptics. Although many newer display and contro... View full abstract»

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  • The Landsat-6 satellite: an overview

    Publication Year: 1991, Page(s):277 - 282
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    Landsat 6 (L6), a remote land sensing satellite, is scheduled to be launched into a 705 km, circular, sun-synchronous orbit by a Titan-II booster in mid 1992. The L6 satellite has been designed to provide 30 m spatial resolution multispectral image data continuity via an enhanced thematic mapper (ETM) sensor which includes a panchromatic band with 15 m spatial resolution. A brief background descri... View full abstract»

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  • UWB waveforms and coding for communications and radar

    Publication Year: 1991, Page(s):139 - 141
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The author describes the efforts of Time Domain Systems Incorporated (TDS), a small company specializing in the development of RF monocycle waveform applications. the areas of application are primarily short-range communications and radar. Monocyclic RF is a subset of ultrawideband (UWB) electromagnetics. UWB signals are defined as having greater than 25% relative bandwidth as defined by BW/f... View full abstract»

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  • Surrogate teleoperated vehicle (STV)

    Publication Year: 1991, Page(s):315 - 320
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Robotics Systems Technology is building surrogate teleoperated vehicles (STV). The STV system consists of two parts-the remote platform (RP) and the mobility/RSTA module (MOB/RSTA). The RP is based on an off-the-shelf Polaris six-wheel drive, Ackerman-steered all terrain vehicle. Its full suspension allows the operator to drive at speeds exceeding 58 k/h. The current automatic drive train will be ... View full abstract»

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  • Trends in future avionics architectures incorporating radar processing technology

    Publication Year: 1991, Page(s):235 - 240
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The author considers trends in avionics architecture development, and the selection of the underlying technology used to build the integrated avionics, given processing and platform requirements. Processing includes communications, navigation and identification, electronic warfare, electrooptics, video, controls and displays, and radar applications. The radar application is used to illustrate the ... View full abstract»

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  • Flight Telerobotic Servicer: the development test flight

    Publication Year: 1991, Page(s):377 - 383
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    The development test flight (DTF-1) is the first of two Space Shuttle flights to test operations of the Flight Telerobotic Servicer (FTS) in space and to demonstrate its capabilities in performing tasks for Space Station Freedom. The DTF-1 system is scheduled to be flown in early 1993 as an attached payload on the Shuttle. The authors discuss the design of the DTF-1 system, the tests to be perform... View full abstract»

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  • Active-element, phased-array radar: affordable performance for the 1990s

    Publication Year: 1991, Page(s):193 - 197
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Active-element, electronically scanned, phased-array (AESA) radars have been shown to offer unique solutions for future airborne weapons systems. Flight demonstrations have validated AESA technologies and have clearly shown the advantages of AESA radars. These technologies are the product of research programs carried out over the past 25 years that led to airborne demonstration of AESA radars in 1... View full abstract»

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  • Neural network based control system design of an advanced fighter aircraft

    Publication Year: 1991, Page(s):1 - 6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The author demonstrates the application of neural network technology to optimal scheduling of control gains in real-time flight control systems commonly used in the real-time control of an advanced fighter aircraft and high-performance aerospace vehicles where a priori target outputs are not known, and must be generated in real-time. A learning algorithm and an appropriate performance model have b... View full abstract»

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  • Autonomous Landing Guidance concept validation

    Publication Year: 1991, Page(s):37 - 46
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    The Autonomous Landing Guidance system is intended to provide pilots visibility and landing guidance at night regardless of the weather and without the need for standard, ground-based navigation aids. The basic system concept, employing precision-updated INS (inertial navigation system) guidance with multispectral imaging on a heads-up display (HUD), has been validated and system demonstration dat... View full abstract»

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  • DSCS III Receive Multiple Beam Antenna performance improvement

    Publication Year: 1991, Page(s):147 - 150
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    In an effort to cope with the increasing demand of services on the Defense Satellite Communications System (DSCS) and more stringent ECCM (electronic counter-countermeasures) requirements, the performance limitations on the DSCS III Receive Multiple Beam Antenna (RMBA) imposed by random and systematic perturbations have been addressed. The concept of VPSFT (variable phase shifter fine tuning) clos... View full abstract»

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  • Fidelity aspects of radar target and environment simulation

    Publication Year: 1991, Page(s):247 - 256
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    Over the last ten years, Cross Systems has been developing real-time radar target and environment simulators according to end user requirements. The authors address, in general terms, some of the simulation modeling that has been implemented in these simulators with an emphasis on the varying degrees of model fidelity, especially relative to the end user's requirements. The general trend of increa... View full abstract»

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  • JEMRMS system design and development status

    Publication Year: 1991, Page(s):391 - 395
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The authors present an overview of the baseline configuration of the JEMRMS (Japanese Experiment Module Remote Manipulator System) and summarize the status of the system and element development tests. JEMRMS has mother-daughter type manipulators: a 10 m long mother arm (main arm) and a 2 m-long daughter arm (small fine arm). The main arm (MA) provides that capability of transferring, retrieving, a... View full abstract»

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  • Design goals and system description of the flight support system/servicing aid tool

    Publication Year: 1991, Page(s):403 - 406
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The flight support system/servicing aid tool (FSS/SAT) consists of two systems: the FSS, a cradle used with the Shuttle to berth, position, and power satellites, and the SAT, a telerobot to be attached to the FSS. The author identifies the design goals of the FSS/SAT and discusses the major features of the SAT. Particular attention is given to the main components of the protoflight system, a motor... View full abstract»

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  • Fractal interpolation of radar signatures for detecting stationary targets in ground clutter

    Publication Year: 1991, Page(s):83 - 87
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Fractal geometry techniques are applied to the radar stationary target detection problem. Target and clutter signatures are fractalized via fractal interpolation, and their resulting fractal dimensions are determined. This fractal dimension was used to distinguish targets from clutter using a simple thresholding technique. This fractal dimension feature was used both independently and in combinati... View full abstract»

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