风电叶片两点疲劳试验系统激振器加载控制

基于电驱动惯性式激振装置,构建了一种风电叶片两点激振疲劳试验系统,并提出了虚拟主令同步控制算法.以PID算法设计误差补偿器,利用李雅普诺夫函数证明虚拟主令同步控制算法的稳定性,并建立控制仿真模型,数值仿真分析虚拟主令同步控制算法的收敛性及鲁棒性.最后,试验验证了耦合下虚拟主令同步控制算法的有效性.结果表明:虚拟主令同步控制算法能使激振器快速跟随,激振器之间相位差的波动很小,叶片振幅稳定,实现了风电叶片的平稳有效加载.

Load Control of Vibration Exciter in Two point Fatigue Test System of Wind Turbine Blade

Based on the electrically driven inertial vibration exciter, a two point excitation fatigue test system of wind turbine blade was constructed. The virtual master synchronization control algorithm was put forward. The PID algorithm was used to design the error compensator, then the stability of the control algorithm was proved by using Lyapunov function. The control simulation model was established, and the convergence and the robustness of the control algorithm were analyzed by numerical simulation. Finally, the effectiveness of the control algorithm of electromechanical coupling was verified. The results show that the control algorithm can make the exciter follow quickly, the fluctuation of phase difference between the exciters is very small, the blade amplitude is stable, and the stable and effective loading of wind turbine blades is realized.