Abstract：With the consideration of the important indicator of wind resistance for measuring flight stability, safety and high quality of spraying operations of plant protection UAV, a wind resistance test system for plant protection UAV was developed based on the variable frequency control technology with four parts of axial fan assembly, hydraulic lifting platform, variable frequency control device and airflow field monitoring device. The airflow field was monitored by the gridded measurement method, and the wind speed sensors were used to measure the wind speed of each node. The wind speed and direction of each point by wind turbine were collected at different frequencies and different heights from ground. The test results show that the wind resistance test system can generate an adjustable cylindrical airflow field in transverse crosswind with length of about 5 m, diameter of about 3 m and height of 3 to 7 m from ground when the natural wind speed is lower than 3 m·s-1. The cylindrical airflow field with the same wind direction can meet the requirements of wind resistance test for the plant protection UAV.
