Results 241 to 250 of about 5,137,558 (305)

A Critical Comparison of Excitation Force Estimators for Wave-Energy Devices

IEEE Transactions on Control Systems Technology, 2020
The implementation of energy-maximizing control systems (EMCSs) can significantly increase the efficiency and economic viability of resonant wave-energy converters (WECs). To achieve optimal control and drive the WEC into resonance with the incoming wave
Y. Peña-Sanchez, C. Windt, J. Davidson, J. Ringwood   +3 more
semanticscholar   +1 more source

External forcing of spiral waves

Chaos: An Interdisciplinary Journal of Nonlinear Science, 1994
The effect of an external rhythm on rotating spiral waves in excitable media is investigated. Parameters of the unperturbed medium were chosen, such that the organizing spiral tip describes meandering (hypocyclic) trajectories, which are the most general shape for the experimentally observed systems.
Vladimir S., Zykov, Oliver, Steinbock, Stefan C., Muller   +2 more
openaire   +2 more sources

Robust Excitation Force Estimation and Prediction for Wave Energy Converter M4 Based on Adaptive Sliding-Mode Observer

IEEE Transactions on Industrial Informatics, 2020
The wave excitation force estimation and prediction play an important role in improving the performance of causal and noncausal controllers for wave energy converters (WECs).
Yao Zhang, Tianyi Zeng, Guang Li
semanticscholar   +1 more source

Identification Of Nonlinear Wave Forces

Journal of Fluids and Structures, 1994
Abstract This paper is concerned with the time and frequency-domain analysis of nonlinear wave force data. In the first half of the paper, the time-domain NARMAX modelling technique is applied to a number of fluid loading data sets in order to establish if there exists a simple extension of Morison's equation which will predict forces with improved ...
Worden, K, Stansby, Peter, Billings, S A, Tomlinson, G R   +3 more
openaire   +2 more sources

Wave forces on hemicylinders

Ocean Engineering, 1989
Abstract Potential solutions describing the flow about two-dimensional marine structures on or near the ocean bottom are formulated, based on Airy's wave model. The solutions for a half-cylinder and semicircular shell are considered in detail and evaluated in the case of deep submergence. The formulation with and without flow underneath the structure
Subrata K. Chakrabarti, Robert A. Naftzger   +1 more
openaire   +1 more source

Forced Trench Waves

Journal of Physical Oceanography, 1981
Abstract A general theory for forced barotropic long trench waves in the presence of linear bottom friction is presented. Two specific forcing mechanisms are considered: (i) transverse fluctuations in a western boundary current as it flows across a trench, and (ii) a traveling wind system that moves parallel to the trench.
Lawrence A. Mysak, Andrew J. Willmott
openaire   +1 more source

Study on force and wave energy conversion efficiency of buoys in low wave energy density seas

Energy Conversion and Management, 2019
The performance of wave energy converters is significantly affected by buoys. This research studied the force and conversion efficiency of buoys in low wave energy density seas and involved the selection of a cylindrical buoy and a hemispherical buoy ...
Fei Chen, D. Duan, Qing Han, Xuefeng Yang, Fang Zhao   +4 more
semanticscholar   +1 more source

Wave forces on a circular dock

Journal of Fluid Mechanics, 1971
The scattering of surface gravity waves by a circular dock is considered in order to determine the horizontal and vertical forces and torque on the dock. An incident plane wave is expanded in Bessel functions, and for each mode the problem is formulated in terms of the potential on the cylindrical surface containing the dock and extending to the bottom.
openaire   +1 more source

Wave equations for matter force waves

Russian Physics Journal, 1994
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Wave Diagnostics and Forcing

Russian Physics Journal, 2018
Physical possibilities of remote diagnostics and manipulation with the state of the propagation medium by the methods of wave tomosynthesis are considered. This refers to the electromagnetic and acoustic waves as well as waves of other nature. Important are multi-position measurements with retention of phase information at each point of the medium that
V. P. Yakubov, S. E. Shipilov, D. Ya. Sukhanov   +2 more
openaire   +1 more source