Real-time wave excitation force estimation for an experimental multi-DOF WEC
Real-time wave excitation force estimation for an experimental multi-DOF WEC
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DOI：
10.1016/j.oceaneng.2020.107788
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发表时间：
2020-10
影响因子：
5
通讯作者：
A. Hillis;A. Brask;C. Whitlam
中科院分区：
文献类型：
--
作者：
A. Hillis;A. Brask;C. Whitlam
波浪能转换器（WEC）需要一种主动控制策略，以在广泛的操作条件下最大限度地提高效率。许多控制策略需要波浪激振力的知识，这是一个无法在操作中测量的量。在这项研究中，基于卡尔曼滤波器的两种方法进行了测试与实验1：25的规模多自由度WEC。一个随机的和周期性的卡尔曼估计器的实施，只使用在实践中可测量的数量。调整估计的方法进行了讨论，并在WEC的非线性和未建模的影响，包括二次粘性阻尼的敏感性。比较了每种方法的优点，使用两种方法都获得了优异的质量估计结果。这两种方法都被验证用于先进的控制策略，以提高WEC的功率捕获。
A wave energy converter (WEC) needs an active control strategy to maximise efficiency in a wide range of operating conditions. Many control strategies require knowledge of the wave excitation force, a quantity which cannot be measured in operation. In this study, two methods based upon Kalman filters are tested with an experimental 1:25th scale multiple degree-of-freedom WEC. A stochastic and a periodic Kalman estimator are implemented, using only quantities which are measurable in practice. Methods for tuning the estimators are discussed, and sensitivity to nonlinearity in the WEC and to unmodelled effects including quadratic viscous damping are established. The advantages of each method are compared, and excellent quality estimation results are obtained using both methods. Both methods are verified for use with advanced control strategies to improve power capture in WECs.