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Spectral technique for generating gaussian wave packets

Do, Tien and Lleonart, Geoffrey T and Rouillard, Vincent (2004) Spectral technique for generating gaussian wave packets. Journal of waterway, port, coastal and ocean engineering, 130 (2). pp. 104-108. ISSN 0733-950x

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Abstract

This paper deals with the development of a spectral feedback control technique capable of generating precise Gaussian wave packets and incipient breaking waves at predetermined locations in a laboratory wave flume. The design of the system includes the development of algorithms to generate the mathematical equations that define the wave packets and the spectral control algorithm for continuously correcting the system frequency response characteristics. Descriptions of the mathematical model of the Gaussian wave packets and their corresponding frequency spectra are given, along with the procedure used for spectral feedback compensation, especially with regard to handling the phase. The results of comparing wave packets generated by open and closed loop control systems are discussed. Experimental results are also used to demonstrate the adequacy of the spectral feedback technique to accurately generate particular Gaussian wave packets with particular emphasis on the important role played by the phase in reconstruction of transient signals. In addition, a method for generating breaking waves is explained and the results of experiments presented. Using the technique developed, resultant breaking wave packets of similar shape can be repeatedly produced at a predetermined location along the flume.

Item Type: Article
Uncontrolled Keywords: spectral analysis, gaussian process, feedback control, breaking waves, flumes, wave packets, spectrum analysis, spectral sensitivity
Subjects: RFCD Classification > 290000 Engineering and Technology
FOR Classification > 0913 Mechanical Engineering
Faculty/School/Research Centre/Department > School of Engineering and Science
Depositing User: Ms Phung T Tran
Date Deposited: 20 Oct 2008 02:28
Last Modified: 11 Dec 2014 05:47
URI: http://vuir.vu.edu.au/id/eprint/1082
DOI: 10.1061/(ASCE)0733-950X(2004)130:2(104)
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Citations in Scopus: 1 - View on Scopus

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