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RISNonlinear Model Predictive Control Applied to a Generic Ocean Wave Energy Extractor1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper evaluates the theoretical application of nonlinear model predictive control (NMPC) to a modelscale point absorber for wave energy conversion. The NMPC strategy will be evaluated against a passive system, which ...
Shape Effects on Viscous Damping and Motion of Heaving Cylinders1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fluid viscosity is known to influence hydrodynamic forces on a floating body in motion, particularly when the motion amplitude is large and the body is of bluff shape. While traditionally these hydrodynamic force or force ...
Performance Enhancements and Validations of a Generic Ocean Wave Energy Extractor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper evaluates two aspects of enhancements made to a generic oceanwave energy extraction device, developed recently at University of California (UC)Berkeley with features reported in Yeung et al. (2010, “Design, ...
Computational Modeling of Rolling Wave Energy Converters in a Viscous Fluid1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The performance of an asymmetrical rolling cam as an oceanwave energy extractor was studied experimentally and theoretically in the 70s. Previous inviscidfluid theory indicated that energyabsorbing efficiency could approach ...
Bilge-Keel Influence on Free Decay of Roll Motion of a Realistic Hull1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The prediction of roll motion of a ship with bilge keels is particularly difficult because of the nonlinear characteristics of the viscous roll damping. Flow separation and vortex shedding caused by bilge keels significantly ...
An Efficient Convex Formulation for Model-Predictive Control on Wave-Energy Converters1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Model-predictive control (MPC) has shown its strong potential in maximizing energy extraction for wave-energy converters (WECs) while handling hard constraints. However, the computational demand is known to be a primary ...
The 2010 Oil Spill in the Gulf of Mexico: Flow-Rate Estimation Based on Satellite-Images Analysis1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The Deepwater Horizon Mobile Offshore Drilling Unit (MODU) was one of several classes of floatable drilling systems. The explosion on April 20, 2010 led to fatalities and the worst oil spill in the U.S. We present an ...
Power Optimization of Model-Scale Floating Wind Turbines Using Real-Time Hybrid Testing With Autonomous Actuation and Control1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Real-time hybrid testing of floating wind turbines is conducted at model scale. The semisubmersible, triangular platform, similar to the WindFloat platform, is built instead to support two, counter-rotating vertical-axis ...
Lateral Force and Yaw Moment on a Slender Body in Forward Motion at a Yaw Angle
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a solution method for obtaining the lateral hydrodynamic forces and moments on a submerged body translating at a yaw angle. The method is based on the infinitefluid formulation of the freesurface ...