A Piston-Type Active Absorbing Wavemaker System with Delay Compensation

作     者：杨洪齐 李木国 柳淑学 张群 王静 

作者机构：State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2015年第29卷第6期

页      面：917-924页

核心收录：

学科分类：081505[工学-港口、海岸及近海工程] 08[工学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 

基　　金：financially supported by the National Basic Research Program of China(973 Program Grant No.2013CB036101) the National Natural Science Foundation of China(Grant Nos.50879098 and 51221961) Science and Technology Research Projects of Liaoning Provincial Education Department(Grant No.LS2010032) 

主　　题：wavemaker active absorption IIR digital filter time delay 

摘      要：Physical model tests with highly reflective structures often encounter a problem of multiple reflections between the structures and the wavemaker. This paper presents a piston-type active absorbing wavemaker system which can absorb most of the reflections. Based on the first-order wavemaker theory, a frequency domain absorption transfer function is modeled. Its time realization can be achieved by designing an IIR digital filter, which is used to control the absorbing wavemaker system. In a real system, time delays often exist in the wave making process. Thus a delay compensation term to the transfer function is proposed. Experimental results show that the system performs well for both regular and irregular waves with periods from 0.6 s to 2.0 s, and the absorption capability is larger than 96.5% at target wave fields.