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Deviations of cup anemometer rotational speed measurements due to steady state harmonic accelerations of the rotor

机译：转子的稳态谐波加速度引起的杯型风速计转速测量值的偏差

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摘要

The measurement deviations of cup anemometers are studied by analyzing the rotational speed of the rotor at steady state (constant wind speed). The differences of the measured rotational speed with respect to the averaged one based on complete turns of the rotor are produced by the harmonic terms of the rotational speed. Cup anemometer sampling periods include a certain number of complete turns of the rotor, plus one incomplete turn, the residuals from the harmonic terms integration within that incomplete turn (as part of the averaging process) being responsible for the mentioned deviations. The errors on the rotational speed due to the harmonic terms are studied analytically and then experimentally, with data from more than 500 calibrations performed on commercial anemometers. (C) 2016 Elsevier Ltd. All rights reserved.
机译：通过分析稳态时转子的转速（恒定风速）来研究杯型风速计的测量偏差。基于转子的完整匝数，测得的转速相对于平均转速的差异是由转速的谐波项产生的。杯型风速计采样周期包括一定数量的转子完整匝数，再加上一个不完整匝数，谐波项的残差在该不完整匝数内积分（作为平均过程的一部分），是造成上述偏差的原因。对谐波项引起的转速误差进行了分析，然后通过实验进行了研究，并使用了商用风速计上进行的500多次校准得出的数据。 （C）2016 Elsevier Ltd.保留所有权利。

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