Browsing Publications by Title

Now showing items 6-14 of 14

    • Mechanics of nonlinear short-wave generation by a moored near-surface buoy 

      Zhu, Q.; Liu, Y.; Tjavaras, A.A.; Triantafyllou, M.S.; Yue, D.K.P. (Cambridge University Press, 1999)
      We consider the nonlinear interaction problem of surface waves with a tethered near-surface buoy. Our objective is to investigate mechanisms for nonlinear short surface wave generation in this complete coupled wave-buoy-cable ...

    • Oscillating foils of high propulsive efficiency 

      Anderson, J. M.; Streitlien, K.; Barrett, D.S.; Triantafyllou, M.S. (Cambridge University Press, 1998)
      Thrust-producing harmonically oscillating foils are studied through force and power measurements, as well as visualization data, to classify the principal characteristics of the flow around and in the wake of the foil. ...

    • Real Time Estimation of Ship Motions Using Kalman Filtering Techniques 

      Triantafyllou, Michael S.; Bodson, Marc; Athans, Michael (Institute of Electrical and Electronic Engineers, 1983)
      The estimation of the heave, pitch, roll, sway, and yaw motions of a DD-963 destroyer is studied, using Kalman filtering techniques, for application in VTOL aircraft landing. The governing equations are obtained from ...

    • Review of Experimental Work in Biomimetic Foils 

      Triantafyllou, Michael S.; Techet, Alexandra H.; Hover, Franz S. (Institute of Electrical and Electronic Engineers, 2004-07)
      Significant progress has been made in understanding some of the basic mechanisms of force production and flow manipulation in oscillating foils for underwater use. Biomimetic observations, however, show that there is a ...

    • Robust Control For Underwater Vehicle Systems With Time Delays 

      Triantafyllou, Michael S .; Grosenbaugh, Mark A. (Institute of Electrical and Electronic Engineers, 1991)
      Presented in this paper is a robust control scheme for controlling systems with time delays. The scheme is based on the Smith controller and the LQG/LTR (Linear Quadratic Gaussian/Loop Transfer Recovery) methodology. ...

    • Three-dimensional flow structures and vorticity control in fish-like swimming 

      Zhu, Q.; Wolfgang, M.J.; Yue, D.K.P.; Triantafyllou, M.S. (Cambridge University Press, 2002)
      We employ a three-dimensional, nonlinear inviscid numerical method, in conjunction with experimental data from live fish and from a fish-like robotic mechanism, to establish the three-dimensional features of the flow ...

    • Turbulent Flow over a Flexible Wall Undergoing a Streamwise Traveling Wavy Motion 

      Shen, Lian; Zhang, Xiang; Yue, Dick K.P.; Triantafyllou, Michael S. (Cambridge University Press, 2003)
      Direct numerical simulation is used to study the turbulent flow over a smooth wavy wall undergoing transverse motion in the form of a streamwise travelling wave. The Reynolds number based on the mean velocity U of the ...

    • Vortex-induced vibrations of a cylinder with tripping wires 

      Hover, F.S.; Tvedt, H.; Triantafyllou, M.S. (Cambridge University Press, 2001)
      Thin wires are attached on the outer surface and parallel to the axis of a smooth circular cylinder in a steady cross-stream, modelling the effect of protrusions and attachments. The impact of the wires on wake properties, ...

    • Vortical patterns behind a tapered cylinder oscillating transversely 

      Techet, A. H.; Hover, F. S.; Triantafyllou, M.S. (Cambridge University Press, 1998)
      Visualization studies of the flow behind an oscillating tapered cylinder are performed at Reynolds numbers from 400 to 1500. The cylinder has taper ratio 40:1 and is moving at constant forward speed U while being forced ...