An improved Maximum Power Point Tracking (MPPT) method based on a purely mechanical wave energy converter (WEC) of gyroscope precession is proposed. The method adopts dynamic perturbation step adjustment, which improves the stability of power output and reduces steady-state oscillation. The paper introduces the principle of the device, establishes the mathematical model, and obtains the complete expression of power. The effect of wave frequency, pitch amplitude, power take-off (PTO) damping coefficient, and flywheel rotating speed on power output is analyzed. The output regression equation is established, and the extraction conditions of the maximum power are summarized and predicted. Aiming at the time-varying nature of actual ocean waves, a variable step size modified maximum power point (MPP) tracking control algorithm based on perturbation and observation (P&O) method is proposed. The algorithm has a unique technology to dynamically change the perturbation size, which not only improves the dynamic response but also reduces the oscillation. Besides, the boundary conditions ensure that the algorithm will not deviate from the motion trajectory, and the average filtering method and steady-state judgment can further reduce steady-state oscillation. In various ocean conditions, the proposed method has better output stability compared with other variable step size algorithms. Finally, different wave working conditions are given in the experiment, and the results verify the effectiveness of the proposed MPPT control strategy in experimental equipment. The device will be suitable for distributed power sources in small islands and ports.

中文翻译：

---

创新型陀螺仪波能转换器的建模和测试结果

提出了一种基于陀螺仪进动的纯机械波能量转换器（WEC）的改进的最大功率点跟踪（MPPT）方法。该方法采用动态微调步长调节，提高了功率输出的稳定性，减少了稳态振荡。本文介绍了该装置的原理，建立了数学模型，并获得了完整的功率表示。分析了波浪频率，俯仰幅度，动力输出（PTO）阻尼系数和飞轮转速对动力输出的影响。建立输出回归方程，总结和预测最大功率的提取条件。针对实际海浪的时变性质，提出了一种基于扰动和观测（P＆O）方法的变步长修正最大功率点（MPP）跟踪控制算法。该算法具有动态改变扰动大小的独特技术，不仅改善了动态响应，而且减少了振荡。此外，边界条件确保算法不会偏离运动轨迹，并且平均滤波方法和稳态判断可以进一步减少稳态振荡。与其他可变步长算法相比，该方法在各种海洋条件下均具有更好的输出稳定性。最后，在实验中给出了不同的波浪工况，结果验证了所提出的MPPT控制策略在实验设备中的有效性。