To accommodate ocean-wave energy extraction in a wide operating range of sea-states, a nonlinear model predictive control (NMPC) methodology was applied to a lab-scale dual coaxial-cylinder wave-energy converter (WEC), coupled with a permanent-magnet linear generator (PMLG) as the power take-off (PTO). The paper focuses on the experimental implementation of the optimal damping control of the PMLG as guided by the NMPC process, which yielded intermediate values of damping subjected to prescribed damping capacity. This damping behavior was implemented electronically in the coupled PTO-WEC system by employing a solid-state relay (SSR) with pulse-width modulation (PWM) technique so as to mimic analog current flow. The effectiveness of the combination of SSR and PWM was demonstrated. Successful real-time lab-scale testing in regular and irregular waves was experimentally confirmed. Peak values of energy capture and a broadened bandwidth were favorably improved compared to those obtained using just constant, non-time-varying damping control.

为了适应在广泛的海域工作范围内进行海浪能量提取，将非线性模型预测控制（NMPC）方法应用于实验室规模的双同轴圆柱波能量转换器（WEC），并与磁铁线性发电机（PMLG）作为取力器（PTO）。本文重点研究了由NMPC过程指导的PMLG最佳阻尼控制的实验实现，得出了在规定阻尼能力下的阻尼中间值。通过采用具有脉冲宽度调制（PWM）技术的固态继电器（SSR）来模拟模拟电流，在耦合的PTO-WEC系统中以电子方式实现了这种阻尼行为。证明了SSR和PWM组合的有效性。实验证实了在规则波和不规则波中成功的实时实验室规模测试。与仅使用恒定的，非时变的阻尼控制所获得的峰值相比，能量捕获的峰值和更宽的带宽得到了有利的改善。