Research on the Efficiency of Continuous Warning Sound Time Interval in Perceiving Hazards of eVTOL Low Altitude Flight Obstacles

The scale of China’s general aviation industry is developing rapidly, Various new types of passenger short-distance air transportation vehicles are continuously emerging, among which the rise of electric vertical takeoff and landing aircraft (eVTOL) provides a new means of low-altitude flight. The pilotability of passenger aircraft is a necessary condition for flight. In low-visibility environments, when an eVTOL encounters obstacles during flight, how the onboard warning sounds efficiently alert the pilot is an important means to assist in improving flight safety. This paper starts by considering the time intervals between warning sounds. By designing multiple experimental groups with different warning sound time intervals, experiments were conducted in a simulated flight environment, and data was collected. The analysis of the subjects warning recognition efficiency and subjective evaluation scales in different experimental groups, The conclusion was drawn that shorter time intervals between warning sounds are more effective in perceiving danger, providing suggestions for the design of the warning sound module in the obstacle avoidance alarm system for future eVTOL pilot flights.