Adjustable Propeller Blade Fringes for UAV Noise Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing presence of aerial vehicles, such as unmanned aerial vehicles (UAVs), in residential areas poses a challenge in managing the noise generated by their propellers, which can disrupt peaceful environments and potentially disturb residents, especially during delivery operations.
Innovation Solution
The implementation of propeller blade treatments on UAVs that alter the sound generated by disrupting airflow and absorbing noise, using serrations, fringes, and sound-dampening materials, along with adjustable propeller blade treatment controllers to generate anti-sounds or reduce noise levels, is employed. These treatments can be adjusted based on environmental and operational data to minimize noise impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If propeller blade treatments are added to reduce noise, then sound control is improved, but device complexity increases
Solution Approach 1:
The propeller blade is divided into multiple treatment zones with different fringe configurations (leading edge fringes, trailing edge fringes, tip fringes) to address different noise sources at different locations along the blade
Solution Approach 2:
The fringes are designed to be movable rather than fixed, allowing them to be adjusted between extended and retracted positions to adapt to different operational conditions and noise reduction requirements
2Object-affected harmful factors
If fringes are extended to disrupt airflow and reduce noise, then sound control is improved, but aerodynamic efficiency deteriorates
Solution Approach 1:
The fringes can be dynamically adjusted between extended and retracted positions, allowing the system to optimize between noise reduction and aerodynamic efficiency based on operational requirements
Solution Approach 2:
The fringes may be adjusted periodically or in response to detected noise levels, alternating between noise-reducing extended positions and efficiency-oriented retracted positions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces and alters the noise generated by UAVs during operation, enhancing their operational efficiency and minimizing disturbance to residents by optimizing sound levels and frequency spectra in real-time.
Implementation Method 1
the fringes disrupt the airflow around the propeller blades as they rotate
Implementation Method 2
absorb sound generated by the propeller blade as it rotates
Data Source
AI summary
Sounds are generated by an aerial vehicle during operation. For example, the motors and propellers of an aerial vehicle generate sounds during operation. Disclosed are systems, methods, and apparatus for actively adjusting the position of one or more propeller blade treatments of a propeller blade of an aerial vehicle during operation of the aerial vehicle. For example, the propeller blade may have one or more propeller blade treatments that may be adjusted between two or more positions. Based on the position of the propeller blade treatments, the airflow over the propeller is altered, thereby altering the sound generated by the propeller when rotating. By altering the propeller blade treatments on multiple propeller blades of the aerial vehicle, the different sounds generated by the different propeller blades may effectively cancel, reduce, and/or otherwise alter the total sound generated by the aerial vehicle.