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设计一套双作动器共振型风力机叶片疲劳加载系统,对系统能量耗散计算及动力参数匹配,基于多级网络模式制定共振疲劳加载控制策略。对同步控制策略与算法进行研究,确立虚拟主令点动控制方式,采用配重块优化叶片展向弯矩分布误差,以振幅偏差及加载频率为输入输出建立控制系统,控制器基于控制同步方式驱动伺服电机,搜索跟踪共振频率,对振动参数数据采集、存储与分析,实现叶片等幅稳定振动。现场试验结果表明,系统控制同步有效,共振频率搜索与跟踪效果较好,共振时叶片振幅误差保持在5%之内,刚度无明显变化,试验精度与效率得到提高,可为风力机叶片疲劳加载的工程应用提供理论与试验参考。
A dual-actuator resonance-type wind turbine blade fatigue loading system is designed. The energy dissipating calculation and dynamic parameter matching of the system are designed. Resonance fatigue loading control strategy is formulated based on multi-level network mode. The synchronization control strategy and algorithm are studied. The virtual master jogging control mode is established. The counterweight block is used to optimize the distribution error of blade bending moment. The control system is established based on amplitude deviation and loading frequency. The controller is based on control synchronization Drive the servo motor, search and track the resonance frequency, and collect, store and analyze the vibration parameter data to realize the constant amplitude vibration of the blade. The field test results show that the system control is synchronous and effective, the resonance frequency search and tracking effect is good, the amplitude error of the blade at resonance is kept within 5%, the stiffness does not change obviously, the test accuracy and efficiency are improved, The engineering application provides theoretical and experimental reference.