GB/T 38930-2020Requirements and test methods of the capability of wind resistance for civil small and light unmanned aircraft system (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard was proposed by and is under the jurisdiction of the National Technical Committee on Aircraft of Standardization Administration of China (SAC/TC 435).

Drafting organizations: State Grid Intelligence Technology Co., Ltd., China Aero-Polytechnology Establishment, Beijing Institute of Technology, Northwestern Polytechnical University, State Grid Shandong Electric Power Company, Ewatt Technology Co., Ltd., Shenzhen Yidian Aviation Technology Co., Ltd., Nanjing University of Aeronautics and Astronautics, SZ DJI Technology Co., Ltd., Xi'an ASN Technology Group Co., Ltd., Harbin Institute of Technology (Weihai).

Main drafters: Liu Feng, Shu Zhenjie, Xu Wei, He Zhikai, Zhang Fei, Zhang Jianfeng, Ye Chuan, Sun Xiaobin, Qiao Yaohua, Sun Mingjian, Pan Feng, Hu Yingdong, Wang Liang, Zhao Guocheng, Cao Guojie, Zhang Xianzhi, Cao Limin, Zhang Rui, Yang Yang, Jia Jia.

1 Scope

This standard specifies the wind resistance requirements and test methods for civil light and small unmanned aircraft systems, including the wind resistance requirements, test purpose, test conditions, test environment, test interruption and resumption, pass criteria, test procedure, test data processing, evaluation of test results and test report.

This standard applies to civil light and small rotorcraft unmanned aircraft systems (take-off mass between 0.25 kg and 150 kg), including the aircraft and the ground station: unmanned helicopter systems, multirotor unmanned aircraft systems, vertical take-off and landing fixed-wing unmanned aircraft systems (during take-off and landing only) and other rotorcraft unmanned aircraft systems. Other types of unmanned aircraft system may apply it by reference.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 2422, Environmental testing - Guidance for drafting of test methods - Terms and definitions

GB/T 28591, Wind force scale

GB/T 35018-2018, Classification and grading of civil unmanned aircraft systems

GB/T 38152-2019, Terminology of unmanned aircraft systems

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 2422, GB/T 28591, GB/T 35018-2018 and GB/T 38152-2019 and the following apply.

3.1 sustained wind: wind whose speed and direction remain stable over a given period of time.

3.2 gust: wind whose direction fluctuates briefly and whose speed changes sharply. Note: a gust is usually understood as a sudden increase in wind speed.

3.3 shear wind: wind whose direction and/or speed changes over a short distance, at the same height or between different heights. Note: it is the vector difference of the wind between two points in space.

3.4 capability of wind resistance: the ability of the unmanned aircraft system, with the flight control system engaged, to withstand wind up to a given level. Note: according to the state of the system when withstanding the corresponding wind speed, wind resistance is divided into the lowest safe wind resistance and the lowest operational wind resistance.