Dynamics and Control of a Novel Wave-Augmented Floating Offshore Wind Turbine

这笔赠款将用于研究，实现在浮动海上风力涡轮机上控制使用组合气动和流体动力负载的创新，以增加能源提取和减少平台质量，从而降低用于关键可再生能源发电技术的电力收集的水平成本，从而促进科学进步和国家繁荣。为了在极端的风浪条件下稳定运行，海上浮动风力涡轮机被设计得又大又重。仅浮动平台一项就占总资本支出的很大一部分。该项目研究了一种新颖的物理设计和创新的控制架构，该架构利用风能和波浪能之间的耦合，使更轻的浮动平台能够满足稳定性要求，同时还提高了能量捕获效率。通过将波浪增强的控制权力与浮动平台相结合，该项目旨在建立利用波浪能量而不是减轻其影响的基础范例。一项针对高中生的综合推广计划和为高中教师开发的风能和海浪能网络资源旨在扩大对STEM的参与，包括目前代表不足的群体的个人。这项研究旨在为创新的物理设计和相关控制逻辑发展理论基础，该逻辑允许浮动海上风力涡轮机基础内封闭气室中的波浪驱动压力，以衰减其运动并驱动辅助涡轮机。它通过对增浪物理系统的水力、气动和热力耦合行为的协同分析、计算和实验研究，以及以滑模控制为基础的控制体系的开发，实现了这一结果，确保了在环境不确定情况下的最佳性能。在模拟波浪基座运动的动力平台上，建立了涡轮机上部结构的定标气动弹性边界层风洞模型，建立了稳健的气动时域载荷公式。使用随机搜索策略同时优化系统和控制参数。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This grant will fund research that enables innovation in the controlled use of combined aero- and hydrodynamic loading on floating offshore wind turbines to increase energy extraction and reduce platform mass -- resulting in a reduction in the levelized cost of electric power harvested for a key renewable energy generation technology -- thereby promoting the progress of science and advancing the national prosperity. To operate stably under extreme wind and wave conditions, floating offshore wind turbines are designed to be large and heavy. The floating platform alone occupies a significant portion of the overall capital expenditures. This project investigates a novel physical design and innovative control architecture that leverages the coupling between wind and wave power to allow stability requirements to be satisfied by a lighter floating platform, while also enhancing the energy-capturing efficiency. By integrating a wave-augmented control authority with the floating platform, the project aims to establish a foundational paradigm for leveraging wave power rather than mitigating its influence. An integrated outreach program for high school students and development of web-based resources on wind and wave energy for high school teachers aim to broaden participation in STEM, including to individuals from currently underrepresented groups.This research aims to develop the theoretical foundations for an innovative physical design and associated control logic that allows wave-driven pressure in closed-air chambers inside the foundation of a floating offshore wind turbine to both attenuate its motion and drive an auxiliary turbine. It accomplishes this outcome through a synergistic analytical, computational, and experimental study of the coupled hydro-, aero-, and thermodynamic behavior of the wave-augmented physical system, as well as the development of a control architecture rooted in sliding mode control, which ensures optimal performance also under environmental uncertainty. A robust aerodynamic time-domain load formulation is developed using a scaled-aeroelastic, boundary-layer wind-tunnel model of the turbine superstructure on a dynamic platform that simulates wave-induced base motion. System and control parameters are optimized concurrently using a stochastic search strategy.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.