兆瓦级风力机叶片疲劳加载系统及其自适应扫频控制

发布时间：2018-04-21 04:31

本文选题：风力机叶片 + 疲劳加载系统　；参考：《太阳能学报》2014年06期

【摘要】：设计一套偏心质量快驱动的兆瓦级风力机叶片疲劳加载试验系统,整个加载系统采用多级网络互联模式。由于疲劳试验周期较长,导致加载点刚度变化,引起叶片振幅衰减。针对该问题,通过激光测距仪获取加载点振幅作为控制指标,并以振幅变化及其变化趋势作为输入,加载频率作为输出,建立模糊扫频控制系统,变频电机驱动叶片实现等幅振动。试验结果表明该加载系统结构可靠、自动控制过程稳定,自适应扫频控制器能有效维持风力机叶片的幅值误差小于5 mm,满足试验要求。
[Abstract]:A fatigue loading test system for megawatt wind turbine blades driven by eccentricity mass is designed. The multistage network interconnection mode is adopted in the whole loading system. Because of the long fatigue test period, the stiffness of the loading point changes and the amplitude of the blade attenuates. Aiming at this problem, the amplitude of the loading point is obtained by laser rangefinder as the control index, and the amplitude change and its changing trend are taken as the input and the loading frequency is taken as the output to establish the fuzzy sweep frequency control system. The variable frequency motor drives the blade to realize the equal amplitude vibration. The experimental results show that the loading system is reliable, the automatic control process is stable, and the adaptive frequency sweep controller can effectively maintain the amplitude error of the blade of the wind turbine less than 5 mm, which meets the test requirements.
【作者单位】：山东理工大学机械工程学院;
【基金】：国家自然科学基金(51305243)
【分类号】：TM315

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