81–100 von 157 Ergebnissen
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    Feasibility of using piezoelectric actuators to control launch vehicle acoustics and structural vibrations

    Niezrecki, C. / Cudney, H.H. | Tema Archiv | 2000
    model for the actuator and boundary element analysis. The experimentally validated model is used to extrapolate results for an SS cylinder that ...

    Industrial and commercial applications of bi-stable reeled composites

    Compton-Bishop, Q.M. / Daton-Lovett, A.J. / Curry, R.G. | Tema Archiv | 2000
    their retracted length. Used for the remote deployment of cameras and other tools into hazardous environments, BRC actuators have facilitated ...

    Optical-fiber-based adhesive bondline monitoring system for composite patch systems

    Elster, J. / Trego, A. / Dante, J. et al. | Tema Archiv | 2001
    levels in the technology. The presented sensing system is comprised of optical fiber long period gratings (LPGs) for chemical measurement and ...

    Impact damage detection of stiffened composite panels by using embedded small-diameter optical fibers

    Tsutsui, H. / Kawamata, A. / Sanda, T. et al. | Tema Archiv | 2001
    by the sensors. In this study, both multi-mode optical fibers and fiber bragg grating (FBG) sensors are used for detecting impact load and ...

    Development of low-OPD windows for airborne laser

    Billman, K.W. / Tran, D.C. / Johnson, L.F. et al. | Tema Archiv | 2001
    We begin with a brief review of prior work relating to optical windows for use with high power laser beams. A typical window must provide ...

    A two color Mach 3 IR coating for TAMD systems

    Clark, C.C. / Haddow, D. | Tema Archiv | 2001
    successfully protected to include gallium arsenide. BP has already been used as part of a dual band coating for FLIR grade ZnS which performs well ...

    Electro-mechanical impedance method for crack detection in metallic plates

    Giurgiutiu, V. / Zagrai, A. | Tema Archiv | 2001
    positive results obtained for 1-D structure onto 2-D structures. Experiment analysis of 1-D and 2-D structures has shown that E/M impedance (or ...

    Solid particle erosion performance of a new ultradurable AR for silicon

    Clark, C.C. | Tema Archiv | 2001
    protective or substrates must become more durable. For MWIR only systems it is logical to use silicon as a window or dome material as the natural ...

    Processing of carbon-fiber-reinforced composite (CFRP) materials with innovative millimeter-wave technology for aerospace industries

    Hunyar, C. / Feher, L. / Thumm, M. | Tema Archiv | 2001
    characteristic features such as light weight and high specific firmness. For the time being, the main obstacle for widespread industrial applications are ...

    Structural health management for aging aircraft

    Ikegami, R. / Haugse, E.D. | Tema Archiv | 2001
    An effective structural health management (SHM) system can be a useful tool for making aircraft fleet management decisions ranging from ...

    Surface-mounted periodic field eddy current sensors for structural health monitoring

    Goldfine, N.J. / Zilberstein, V.A. / Schlicker, D.E. et al. | Tema Archiv | 2001
    mounted, like a strain gage, at critical locations for detection of crack initiation and monitoring of crack growth. This can be accomplished on a ...

    Miniature vibration isolation system for space applications

    Quenon, D. / Boyd, J. / Buchele, P. et al. | Tema Archiv | 2001
    Laboratory along with its partner DARPA, have initiated an aggressive program to develop a Miniature Vibration Isolation System (MVIS) for space ...

    Materials and actuators for the shape control of structures

    des Rochettes, H.M. / Petitniot, J.L. | Tema Archiv | 2001
    Smart materials and actuators meet a noticeable requirement for the shape control of aerodynamic surfaces. This interest is borne as well ...

    Air vehicle integration issues and considerations for CLAS successful. implementation

    Lockyer, A.J. / Alt, K.H. / Kudva, J.N. et al. | Tema Archiv | 2001
    solved for final technology inclusion in an operational air-vehicle. Presented are some key results from the Air Force Research Laboratory's ...

    Thermal investigation of real aircraft components

    Dal Toe, S. / Bison, P.G. / Marinetti, S. et al. | Tema Archiv | 2001
    Composite materials are prone to various damages, particularly if used for aeronautic fuselage components. These parts are increasingly ...

    Multifunctional system for active noise control and damage detection on a typical aeronautical structure

    Lecce, L. / Viscardi, M. / Zumpano, G. | Tema Archiv | 2001
    piezo's was decided to be used also for health monitoring application. As a preliminary activity, an extensive monitoring was performed on the ...

    Feasibility study of embedded fiber-optic strain sensing for composite propeller blades

    Zetterlind, V.E. / Watkins, S.E. / Spoltman, M.W. | Tema Archiv | 2001
    feasibility of embedded fiber-optic smart instrumentation was examined for use in the commercial manufacture and testing processes used by Hartzell ...

    Mandrel reusability in precision replication of ZnS conformal domes

    Goela, J.S. / Askinazi, J. / Robinson, B. | Tema Archiv | 2001

    Active sensor wave propagation health monitoring of beam and plate structures

    Giurgiutiu, V. / Bao, Jing-Jing / Wei, Zhao | Tema Archiv | 2001
    Active sensor wave propagation technique is a relatively new method for in-situ nondestructive evaluation (NDE). Elastic waves propagating ...

    Buckling behavior monitoring of composite wing box model using fiber Bragg grating sensor system

    Hong, Chang-Sun / Ryu, Chi-Young / Lee, Jung-Ryul et al. | Tema Archiv | 2001
    Advanced composites are being extensively used for aerospace structures due to the high stiffness to weight and high strength to weight ...