关键词: 空中交通管理, 城市空中交通, 无人机, 交叉口, 通行效率

Abstract: To ensure the safety of large-scale operation of unmanned aerial vehicle (UAV) in urban low-altitude airspace and alleviate the bottleneck of low-altitude traffic operation, this paper draws on mature research results in ground transportation and combines the characteristics of urban low altitude and UAV operation to propose an urban air intersection design model based on communication signal control. Firstly, the design of air route configuration and main body of route operation are considered to construct the urban low-altitude air routes required for the UAV operation. Secondly, geometric structure of air intersection is designed from two aspects of entrance and exit channels as well as conflict response distance. Then, traffic organization is designed from three aspects of entrance channel division, communication signal control and UAV height adjustment to achieve the basic model design of the air intersection. Finally, simulation experiment is set up to verify the feasibility of the model, and the comprehensive traffic efficiency of intersection under different parameter combinations is analyzed. The experiments show that when the flight speed is 18 m/s, the longitudinal interval is 50 m and the duration of the control signal cycle is 226 s, the comprehensive traffic efficiency reaches its optimal level. This research can provide support for precise planning and management of future air route network in urban air mobility and enhance the practicality of low-altitude UAV transportation.

Key words: air traffic management, urban air mobility, unmanned aerial vehicle (UAV), intersection, traffic efficiency