UAV Propeller Configurations for Noise Reduction
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) generate noise during delivery, which can be disruptive to nearby users and environments, and existing solutions do not effectively manage noise reduction or alteration in real-time based on changing conditions.
Innovation Solution
UAVs are equipped with multiple sets of propellers of different sizes and treatments, along with sensors and a computing system that dynamically adjust propeller configurations and rotational speeds to reduce and alter noise levels based on real-time sound profiles and environmental data, using machine learning to predict and mitigate noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If UAVs use standard propellers for delivery flights, then delivery efficiency is maintained, but noise levels increase and disrupt nearby users
Solution Approach 1:
The delivery flight is segmented into different phases (transit, approach, delivery, departure), and different propeller configurations are used for each phase. During transit, standard propellers maintain efficiency, while during approach and delivery, noise-reducing propeller configurations are activated to minimize disruption to nearby users.
Solution Approach 2:
The UAV employs dynamically adjustable propeller configurations that can change during flight. The system transitions between different propeller blade treatments and rotational speeds based on real-time flight phase and environmental conditions, allowing optimization of both noise reduction and delivery efficiency.
2Productivity
If UAVs increase propeller rotational speed to maintain delivery speed, then delivery productivity improves, but noise generation increases
Solution Approach 1:
The system changes physical parameters of the propellers including rotational speed, blade pitch angle, and blade surface treatment. By adjusting these parameters dynamically, the UAV can maintain delivery speed while operating in noise-reducing configurations when near sensitive areas.
Solution Approach 2:
The propellers utilize composite blade structures with different materials and surface treatments (such as serrated edges or porous coatings) that reduce noise generation. These composite propeller designs allow for lower rotational speeds while maintaining thrust, thereby reducing noise during critical delivery phases.
3Object-generated harmful factors
If UAVs use noise-reducing propeller configurations, then noise levels decrease, but delivery efficiency and speed may be reduced
Solution Approach 1:
The UAV employs periodic switching between standard and noise-reducing propeller configurations based on proximity to delivery locations and sensitive areas. This periodic action allows the system to minimize overall noise exposure while maintaining high efficiency during long-distance transit portions of the delivery route.
Data Source
AI summary
Techniques for using an unmanned aerial vehicle (UAV) to deliver a payload while reducing and/or altering sound generated by the UAV during delivery may be provided. For example, during delivery, the UAV may be instructed to utilize one or more sets of propellers of different sizes to reduce and/or alter the sound generated by and/or around the UAV. Intrinsic and extrinsic information associated with the UAV may be utilized to dynamically adjust the particular sets of propellers of a certain and different size to utilize during different portions of a flight path while delivering the payload.