A propeller appeared, which makes several times less noise than analogs. Scientists suggest using it in a new generation of drones.
An Australian research team used machine learning to design propellers and then printed some of the most promising prototypes for experimental acoustic testing.
The results, published in Aerospace Research Central, show that the prototypes produced about 15 dB less noise than commercially available propellers, confirming the design methodology developed by the team.
Lead researcher Abdulgani Mohamed noted that the impressive results were possible thanks to two key innovations – the digital algorithms developed to design the propellers and their interpretation of how the ear perceives noise.
“By using our algorithms to iterate over different propeller designs, we were able to optimize them for a variety of parameters such as thrust, torque, sonic directivity, and more. We have also formulated a new metric that includes how the human ear perceives sound, and we propose to use it in future designs, ”added the researchers.
They also noted that this modulation could be used as an important design parameter for future propellers.