Now showing items 1-20 of 286

    • 3D printing vending machine 

      Virginia Tech Intellectual Properties, Inc.; Williams, Christopher B.; Elliott, Amelia M.; McCarthy, David Lee; Meisel, Nicholas Alexander (United States Patent and Trademark Office, 2016-08-16)
      A vending machine for creating a three-dimensional object having an enclosure having an exterior and interior. The interior receives and houses at least one three-dimensional printer. An interface for accepting an instruction ...
    • Accelerometer Based Method for Tire Load and Slip Angle Estimation 

      Singh, Kanwar Bharat; Taheri, Saied (MDPI, 2019-04-28)
      Tire mounted sensors are emerging as a promising technology, capable of providing information about important tire states. This paper presents a survey of the state-of-the-art in the field of smart tire technology, with a ...
    • Acoustic Effects Accurately Predict an Extreme Case of Biological Morphology 

      Zhang, Z. W.; Truong, S. N.; Müller, Rolf (American Physical Society, 2009-07-17)
      The biosonar system of bats utilizes physical baffle shapes around the sites of ultrasound emission for diffraction-based beam forming. Among these shapes, some extreme cases have evolved that include a long noseleaf ...
    • Acoustic performance of a stretched membrane and porous blanket combination 

      Thomas, W. A., Jr.; Hurst, Charles J. (Acoustical Society of America, 1976)
      The sound absorption performance of an acoustic absorber consisting of a stretched circular membrane placed a short distance in front of a fiberglass blanket was both measured and predicted. Both theoretical and experimental ...
    • Acoustics 1991: Active structural acoustic control 

      Fuller, Chris R.; Silcox, Richard J. (Acoustical Society of America, 1992-01-01)
      In summary, the ASAC technique has demonstrated much potential in aerospace and marine applications. Future work will center on extending these techniques to broadband disturbances, more complex structures and improved ...
    • Activation of bacterial channel MscL in mechanically stimulated droplet interface bilayers 

      Najem, Joseph S.; Dunlap, Myles D.; Rowe, Ian D.; Freeman, Eric C.; Grant, John W.; Sukharev, Sergei; Leo, Donald J. (Springer Nature, 2015-09-08)
      MscL, a stretch-activated channel, saves bacteria experiencing hypo-osmotic shocks from lysis. Its high conductance and controllable activation makes it a strong candidate to serve as a transducer in stimuli-responsive ...
    • Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Burdisso, Ricardo A.; Fuller, Chris R.; O'Brien, Walter F.; Thomas, Russell H.; Dungan, Mary E. (United States Patent and Trademark Office, 1996-05-07)
      An active noise control system using a compact sound source is effective to reduce aircraft engine duct noise. The fan noise from a turbofan engine is controlled using an adaptive filtered-x LMS algorithm. Single multi ...
    • Active control of coupled wave propagation in fluid-filled elastic cylindrical shells 

      Brevart, Bertrand J.; Fuller, Chris R. (Acoustical Society of America, 1993-09-01)
      A control approach to reduce the total power propagating along fluid-filled elastic cylinders is analytically investigated. The motion of the cylinder is described by the Kennard shell equations fully coupled to the interior ...
    • Active control of far-field sound radiated by a rectangular panel - a general analysis 

      Pan, Jie; Snyder, Scott D.; Hansen, Colin H.; Fuller, Chris R. (Acoustical Society of America, 1992-04-01)
      In this paper a general analysis is presented for the active control of the far-field harmonic sound radiated by a rectangular panel that is built into an infinite baffle. In this analysis, the panel vibration may be ...
    • Active control of noise transmission through rectangular plates using multiple piezoelectric or point force actuators 

      Wang, Bor-Tsuen; Fuller, Chris R.; Dimitriadis, Emilios K. (Acoustical Society of America, 1991-11-01)
      This paper analytically demonstrates the use of multiple piezoelectric actuators bonded to the surface and point force actuators applied directly to a plate to reduce sound transmission through the plate. A harmonic plane ...
    • Active control of sound radiation due to subsonic wave scattering from discontinuities on fluid-loaded plates. I: Far-field pressure 

      Gu, Yi; Fuller, Chris R. (Acoustical Society of America, 1991-10-01)
      Active control of sound radiation due to subsonic wave scattering from discontinuities represented by a line constraint or by a uniform reinforcing rib positioned on a fluid-loaded infinite plate is analytically studied. ...
    • Active control of sound radiation from a fluid-loaded rectangular uniform plate 

      Gu, Yi; Fuller, Chris R. (Acoustical Society of America, 1993-01-01)
      Active control of sound radiation from a simply supported rectangular fluid-loaded plate is analytically studied. The plate is assumed to be excited by a point force at subsonic frequencies. The solution to the plate motion ...
    • Active control of sound radiation from a plate using a polyvinylidene fluoride volume displacement sensor 

      Charette, Francois; Berry, Alain; Guigou, Catherine (Acoustical Society of America, 1998-03-01)
      This paper presents a new volume displacement sensor (made of shaped strips of PVDF film) and the experimental implementation of this sensor in an active control system. A design strategy for a PVDF sensor detecting the ...
    • Active control of sound radiation from a simply supported beam: Influence of bending near-field waves 

      Guigou, Catherine; Fuller, Chris R. (Acoustical Society of America, 1993-05-01)
      Active control of sound radiation from a baffled simply supported finite beam is analytically studied. The beam is subjected to a harmonic input force and the resulting acoustic field is minimized by applying a control ...
    • Active isolation of vibration with adaptive structures 

      Guigou, Catherine; Fuller, Chris R.; Wagstaff, Peter R. (Acoustical Society of America, 1994-07-01)
      The problem of actively isolating the periodic vibrations of a rigid machine mounted on a supporting flexible structure is usually approached by applying the active inputs in parallel or series with the passive inputs. ...
    • Active Vibration Isolation Using an Induced Strain Actuator with Application to Automotive Seat Suspensions 

      Malowicki, Mark; Leo, Donald J. (Hindawi, 2001-01-01)
      Active vibration isolation of automotive seats requires actuators that achieve millimeter-range displacements and forces on the order of 300 N. Recent developments in piezoceramic actuator technology provide a means for ...
    • An Adaptive Actuation Mechanism for Anthropomorphic Robot Hands 

      Kontoudis, George P.; Liarokapis, Minas; Vamvoudakis, Kyriakos G.; Furukawa, Tomonari (Frontiers, 2019-07-05)
      This paper presents an adaptive actuation mechanism that can be employed for the development of anthropomorphic, dexterous robot hands. The tendon-driven actuation mechanism achieves both flexion/extension and adduction/abduction ...
    • Adaptive feedforward and feedback methods for active/passive sound radiation control using smart foam 

      Guigou, Catherine; Fuller, Chris R. (Acoustical Society of America, 1998-07-01)
      This work investigates and compares the potential of adaptive feed forward and feedback methods for a hybrid active/passive radiation control using smart foam. The radiating structure is a vibrating plate mounted in a rigid ...
    • Adaptive near-field beamforming techniques for sound source imaging 

      Cho, Yong Thung; Roan, Michael J. (Acoustical Society of America, 2009-02-01)
      Phased array signal processing techniques such as beamforming have a long history in applications such as sonar for detection and localization of far-field sound sources. Two sometimes competing challenges arise in any ...
    • Additive manufacturing of complex micro-architected graphene aerogels 

      Hensleigh, Ryan M.; Cui, Huachen; Oakdale, James S.; Ye, Jianchao C.; Campbell, Patrick G.; Duoss, Eric B.; Spadaccini, Christopher M.; Zheng, Xiaoyu; Worsley, Marcus A. (Royal Society of Chemistry, 2018-08-13)
      3D graphene foams exhibit immense degradation of mechanical properties. Micro-architecture can alleviate this problem, but no current technique meets the manufacturing requirements. Herein we developed a light-based 3D ...