An adaptive system for the active cancellation of random wave fields

1982 ◽  
Vol 25 (6) ◽  
pp. 472-480
Author(s):  
S. N. Arezamasov ◽  
A. A. Mal'tsev
Keyword(s):  
Adaptive System ◽  
Random Wave ◽  
Wave Fields ◽  
Active Cancellation

Structural correlations in Gaussian random wave fields

1995 ◽  
Vol 51 (4) ◽  
pp. 3770-3773 ◽  
Author(s):  
Isaac Freund ◽  
Natalya Shvartsman
Keyword(s):  
Random Wave ◽  
Wave Fields

Closing remarks

1967 ◽  
Vol 299 (1456) ◽  
pp. 145-145 ◽  
Keyword(s):  
Variational Method ◽  
Mode Interaction ◽  
Random Wave ◽  
Interaction Techniques ◽  
Dispersive Waves ◽  
Wave Fields ◽  
The Past ◽  
Interesting Discussion ◽  
The Subject ◽  
Near Future

This has been a most interesting Discussion to attend, and will, I believe, in its written version, be a work of marked permanent value, especially because the contributors, as well as giving penetrating and comprehensive reviews of their own parts of the subject, have carefully elucidated also the relations between the parts. Methods apparently of very diverse character for analysing the nonlinear development of dispersive waves have been described. Although they have different areas of validity, there are regions of overlap between those areas, where contributors have taken pains to show that they give identical results. In particular, the relations between Whitham’s variational method, Brooke Benjamin’s stability analyses, the mode interaction techniques of Phillips and Longuet-Higgins, and Hasselmann’s work on random wave fields, have become much clearer, so that the advances of the past six years begin to form a coherent pattern. Some uncertainties, and many unsolved problems, remain; but comparisons of the existing theories with experiment have yielded such encouraging results, that many workers are likely to attempt further developments of them in the near future.

Phase autocorrelation of random wave fields

1996 ◽  
Vol 124 (3-4) ◽  
pp. 321-332 ◽  
Author(s):  
Isaac Freund ◽  
David A. Kessler
Keyword(s):  
Random Wave ◽  
Wave Fields

Vortices in Random Wave Fields: Nearest Neighbor Anticorrelations

1994 ◽  
Vol 72 (26) ◽  
pp. 4156-4156 ◽  
Author(s):  
Natalya Shvartsman ◽  
Isaac Freund
Keyword(s):  
Nearest Neighbor ◽  
Random Wave ◽  
Wave Fields

A Spectral Feedback Compensation Technique for the Generation of Random Wave Fields

1994 ◽  
Vol 208 (2) ◽  
pp. 105-112 ◽  
Author(s):  
V Rouillard ◽  
G T Lleonart
Keyword(s):  
Closed Loop ◽  
Open Loop ◽  
Control Technique ◽  
Random Wave ◽  
Closed Loop Control ◽  
Random Waves ◽  
Wave Fields ◽  
Loop Control ◽  
Spectral Models ◽  
Spectral Feedback

Computer software was developed to control an electromechanical wave generator to accurately simulate random wave fields derived from mathematical spectral models. The software algorithm makes use of a spectral feedback control technique to improve accuracy and reliability in the continuous generation of random waves in the laboratory. Experiments were conducted to investigate the advantages of this closed-loop control technique over more commonly used open-loop random wave generation methods. The results show a decided advantage in using closed-loop control for the generation of random waves, especially for double-peak wave spectra and model testing purposes.

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