关键词: 多旋翼无人机（UAV）, 风速测量, 流场分析, 超声波风速仪, CFD 仿真

Abstract: To address the issue of inaccurate wind speed measurement caused by external disturbances during the wind field measurement process of multi-rotor unmanned aerial vehicle (UAV), computational fluid dynamics (CFD) simu鄄 lation approach was employed to analyze the influence of the external distorted flow field generated during UAV flight on the measurement results of the ultrasonic anemometer. The results indicate that the wind speed values measured by the ultrasonic anemometer carried by the UAV were relatively high. Quantitative deviation values were derived from the simulations and incorporated as correction factors into the wind speed calculation formula. Experimental validation demonstrate that compared with the uncorrected wind speed values, the standard devia鄄 tion of the corrected northbound wind speed is reduced from 0.844 6 to 0.309 3, while that of the eastbound wind speed decreased from 0.664 9 to 0.470 2. These results confirm that the measurement system improves the accu鄄 racy of wind field measurement and provides a reference for further research on UAV wind speed measurement methods.

Key words: multi-rotor unmanned aerial vehicle (UAV), wind speed measurement, flow field analysis, ultrasonic anemometer, computational fluid dynamics (CFD) simulation