为减少加载过程中叶片挠度变形带来的测量误差,提出一种精准测量钢丝绳与风电叶片空间角度的数学模型。该模型构建的空间角度测量系统采用3个位移传感器,可实时测量钢丝绳与风电叶片所成三维角度,从而精确地对各加载点进行受力补偿,提高加载试验的协同性。以激光追踪仪的测量结果为基准对该系统的测量结果进行现场验证,结果表明该系统所测空间角度误差率仅为1.78%、1.96%和1.92%,同时经该空间角度测量系统补偿后的加载力曲线变化平稳,可较好地实现多节点力的协同加载。
Abstract
In order to reduce the measurement error caused by the deflection of the blade during the loading process, a mathematical model for accurately measuring the spatial angle between the wire rope and the wind turbine blade was proposed. The spatial angle measurement system constructed by this model adopted three displacement sensors, which could measure the three-dimensional angle formed by the wire rope and the wind turbine blade in real time, so as to accurately compensated the force of each loading point and improved the synergy of the loading test. The measurement results of the system were verified on-site based on the measurement results of the laser tracker. The results show that the error rate of the spatial angle measured by the system is only 1.78%, 1.96% and 1.92%. The loading force curve changes smoothly, which can better realize the coordinated loading of multi-node forces.
关键词
风电叶片 /
静力加载 /
钢丝绳 /
空间角度 /
测量系统
Key words
wind turbine blades /
static loading /
steel wire rope /
spatial angle /
measurement system
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