Development of model-based and model-free reactive control scheme: considering copper loss and movable-floater-displacement constraint for a wave energy converter
Development of model-based and model-free reactive control scheme: considering copper loss and movable-floater-displacement constraint for a wave energy converter
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基于模型和无模型无功控制方案的开发：考虑波浪能转换器的铜损和可动浮子位移约束
DOI：
10.1007/s00773-023-00933-w
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发表时间：
2023
影响因子：
2.6
通讯作者：
Fujiwara Toshifumi
中科院分区：
文献类型：
--
作者：
Umeda Jun;Taniguchi Tomoki;Fujiwara Toshifumi
由于海洋波浪能具有很大的潜力，因此波浪能的利用是值得期待的。波能转换器的可行性的改善需要控制，最大化的电输出能量，包括铜损失下的位移约束。已经开发了几种基于模型和无模型的反应控制。虽然基于模型的无功控制达到了很高的性能，它的斗争，以处理建模误差和预测波激励力。另一方面，无模型反应控制可以适应动态建模，包括建模误差，但需要大量的学习数据和大量的时间和精力来考虑位移约束，基于模型和无模型反应控制各有优缺点。组合的基于模型和无模型的反应控制是期望的，以基于各种海洋情况在基于模型和无模型的反应控制之间自由切换。本文提出了两种等效的基于模型和无模型的无功控制，它们可以考虑铜损和位移约束，而无需预测波浪激励力，并利用不规则波的数值模拟将无模型无功控制与基于模型的无功控制和传统控制进行了比较。仿真结果表明，基于模型的无功控制比传统无功控制具有上级性能，无模型无功控制在各种波浪条件下的性能与基于模型的无功控制相当。此外，所提出的无模型无功控制减少了所需的训练试验。这两个等效控制方案的发展将导致在未来的组合基于模型和无模型的无功控制的建议。
The utilization of wave energy is expected since ocean wave energy has a high potential. The improvement of the feasibility of wave energy converters requires control that maximizes the electric output energy, including the copper loss under a displacement constraint. Several model-based and model-free reactive controls have been developed. Although model-based reactive control attains high performance, it struggles to deal with modeling errors and forecasting wave excitation forces. On the other hand, the model-free reactive control can adapt to dynamic modeling, including modeling errors; however, it requires a vast amount of learning data and considerable time and effort to consider the displacement constraint.Modelbased and model-free reactive controls each have advantages and disadvantages. Combined model-based and model-free reactive controls are desirable to freely switch between the model-based and model-free reactive controls based on various ocean situations. In this study, two equivalent model-based and model-free reactive controls that can consider the copper loss and displacement constraints without forecasting the wave excitation forces were proposed.The modelfree reactive control was compared with the model-based reactive control and a conventional control using numerical simulations in irregular waves. The results of the simulation show that the proposed model-based reactive control achieves superior performance compared to that of the conventional control.The proposed modelfree reactive control achieved comparable performance to that of the proposed model-based reactive control under various wave conditions. Moreover, the proposed model-free reactive control decreased the required training trials. The development of the two equivalent control schemes will lead to the proposal of combined model-based and model-free reactive controls in the future.
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