System Identification of a Heaving Point Absorber: Design of Experiment and Device Modeling
System Identification of a Heaving Point Absorber: Design of Experiment and Device Modeling
复制标题
浮点吸收器的系统辨识：实验设计和装置建模
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
D. Wilson
中科院分区：
文献类型：
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作者：
G. Bacelli;R. Coe;D. Patterson;D. Wilson
基于经验的建模是波能转换器设计的一个重要方面。基于经验的模型用于结构、机械和控制设计过程，以及性能预测。实验设计和系统识别中使用的方法对最终模型的质量都有很大的影响。本研究基于模型尺度波浪能转换器的波浪槽试验数据，考虑了系统识别和模型验证过程。讨论了基于一般系统识别程序的实验设计和数据处理技术，并将其与波浪槽试验通常遵循的做法进行了比较。一般的系统识别过程显示出许多优点，包括增加的信噪比，减少的实验时间和更高的频率分辨率。利用波浪槽的实验数据，建立了多个模型，采用不同的公式来表示波浪能转换器的动力学特性。对这些模型进行了验证，并对它们的性能进行了比较。虽然大多数波浪能转换器模型使用的是海面高程作为输入的公式，但本研究表明，使用船体压力测量来考虑波浪激励现象的模型具有更好的准确性。
Empirically based modeling is an essential aspect of design for a wave energy converter. Empirically based models are used in structural, mechanical and control design processes, as well as for performance prediction. Both the design of experiments and methods used in system identification have a strong impact on the quality of the resulting model. This study considers the system identification and model validation process based on data collected from a wave tank test of a model-scale wave energy converter. Experimental design and data processing techniques based on general system identification procedures are discussed and compared with the practices often followed for wave tank testing. The general system identification processes are shown to have a number of advantages, including an increased signal-to-noise ratio, reduced experimental time and higher frequency resolution. The experimental wave tank data is used to produce multiple models using different formulations to represent the dynamics of the wave energy converter. These models are validated and their performance is compared against one another. While most models of wave energy converters use a formulation with surface elevation as an input, this study shows that a model using a hull pressure measurement to incorporate the wave excitation phenomenon has better accuracy.