个人信息Personal Information
研究员
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:水利工程系
电子邮箱:liusx@dlut.edu.cn
A piston-type active absorbing wavemaker system with delay compensation
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论文类型:期刊论文
发表时间:2015-12-01
发表刊物:CHINA OCEAN ENGINEERING
收录刊物:SCIE、EI、ISTIC、Scopus
卷号:29
期号:6
页面范围:917-924
ISSN号:0890-5487
关键字: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.