FOSWEC v2: System identification and control testing at Hinsdale Wave Research Laboratory

This report summarizes the design and execution of a wave tank test of the floating oscillating surge wave energy converter (FOSWEC) in the O.H. Hinsdale Wave Research Laboratory Directional Wave Basin at Oregon State University. This device, which uses two "flaps" that pivot about a central platform when excited by waves, has a natural frequency within the range of the waves by which it is excited. The FOSWEC was originally considered to be a 1:33 scale device, however, for the current tests, no fixed relative scale is used (i.e., the WEC is considered to be scaled for the basin’s wave environment in which it operates). The primary goal of this test was to assess the degree to which previously developed modeling, experimentation, and control design methods could be applied to a broad range of wave energy converter designs. Testing was conducted to identify a dynamic model for the impedance and excitation behavior of the device. Using these models, a series of closed loop tests were conducted using a causal impedance matching controller. This report provides a brief description of the results, as well as a summary of the device and experimental design. The results show that the methods applied to this experimental device perform well and should be broadly applicable. The data collected during testing is compressed into FOSWEC.zip. Please refer to Appendix C (pages 61-63) of the test report for descriptions of each test ID corresponding to the compressed files.

本报告总结了俄勒冈州立大学O.H.辛兹代尔波浪研究实验室定向波浪水池内，漂浮式振荡纵浪波浪能转换器（Floating Oscillating Surge Wave Energy Converter, FOSWEC）的水池试验设计与实施流程。该装置搭载两片围绕中央枢转的翼板，在波浪激励下随波运动，其固有频率处于激励波浪的频率区间内。该FOSWEC原设计为1:33缩比模型，但本次试验未采用固定相对缩比（即本试验中的波浪能转换器（Wave Energy Converter, WEC）缩比适配其运行所在水池的波浪环境）。本次试验的核心目标为评估现有建模、试验及控制设计方法可在多大程度上推广适配各类波浪能转换器设计方案。试验旨在建立该装置的阻抗与激励特性动力学模型，并基于此模型采用因果阻抗匹配控制器开展一系列闭环试验。本报告简要阐述了试验结果，并对装置及试验设计进行了总结。结果表明，应用于本次试验装置的相关方法表现优异，具备广泛的推广适用性。试验采集的全部数据已打包压缩为FOSWEC.zip，各压缩文件对应的试验编号说明请参阅试验报告附录C（第61至63页）。