A Novel Transfer Function Model Based on the Feature Selection Validation Method for Quadrotor Unmanned Aerial Vehicles in High-Intensity Radiated Field Environments

The growing use of quadrotor unmanned aerial vehicles (UAVs), especially in low-altitude airspace, has raised concerns about their susceptibility to high-intensity radiated fields (HIRFs). These electromagnetic interferences can significantly affect UAV performance and safety. Therefore, understanding the electromagnetic behavior of quadrotor UAVs in HIRF environments and establishing robust airworthiness standards is crucial. In this paper, a novel transfer function model specifically designed for small quadrotor UAVs in HIRF environments is studied, covering the frequency range from 100 MHz to 6 GHz. The model characterizes the relationship between internal electric field strength and frequency in response to external excitation conditions. A comprehensive simulation of the interference with UAVs in the HIRF environment is conducted, followed by test validation in an anechoic chamber. To assess the consistency between simulation and test results, the feature selection validation (FSV) method is employed. This paper also compares the UAV transfer function with that of a conventional aircraft, revealing the unique electromagnetic characteristics of quadrotor UAVs and offering insights into their vulnerability in HIRF environments. The findings provide valuable contributions to the development of UAV airworthiness certification standards and their safe operation in complex electromagnetic environments.