Abstract:

To address the current problems of inadequate low-altitude airspace management, imprecise risk assessment, and the lack of safety evaluation in route planning, this paper proposes a technical framework for risk quantification assessment and safe flight route planning based on low-altitude digital twins. Using the BeiDou grid as a reference, the framework manages low-altitude airspace and environmental elements, establishing an integrated ground-air risk quantification model. Based on the results of risk assessment and an improved A^* algorithm, low-altitude flight routes are generated. Field experiments are conducted in a typical urban area in Henan Province, validating the effectiveness of the proposed technology. This approach provides support for the efficient utilization of low-altitude airspace and route planning.

Key words: BeiDou grid, risk quantification assessment, route planning, improved A^* algorithm