Now showing items 1-20 of 306

    • 3D printing vending machine 

      Mechanical Engineering; Macromolecules Innovation Institute (MII); 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 

      Mechanical Engineering; 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. Jr.; 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 ...
    • Adaptive optical beam steering and tuning system based on electrowetting driven fluidic rotor 

      Cheng, Weifeng; Liu, Jiansheng; Zheng, Zheng; He, Xukun; Zheng, Bowen; Zhang, Hualiang; Cui, Huachen; Zheng, Xiaoyu; Zheng, Tao; Gnade, Bruce E.; Cheng, Jiangtao (2020-01-27)
      Reconfigurable beam steering components are indispensable to support optical and photonic network systems operating with high adaptability and with various functions. Currently, almost all such components are made of solid ...