Teardrop UAV Arm Structure for Lower Drag During Liftoff
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Solution Overview
Problem
The flight time of unmanned aerial vehicles (UAVs) is limited by air resistance, which is proportional to the vehicle's contact area with the air, and existing structures do not effectively minimize this resistance during liftoff and landing.
Innovation Solution
A UAV arm with an inverted teardrop-shaped cross-section, featuring a hollow interior and specific curved surfaces, reduces air resistance by optimizing air fluidity and power consumption, and includes a mounting system with droplet-shaped slots for secure connection to the UAV frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the UAV uses conventional arm structures during liftoff and landing, then the structural strength is sufficient, but the air resistance is high which limits flight time
Solution Approach 1:
The arm is designed with a teardrop-shaped cross-section featuring curved surfaces instead of flat or angular geometries. The upper surface has a larger radius of curvature while the lower surface has a smaller radius of curvature, creating a streamlined shape that reduces air resistance during liftoff and landing operations.
Solution Approach 2:
The teardrop-shaped cross-section is asymmetric with the upper curved surface having a different radius of curvature than the lower curved surface. This asymmetric design optimizes air fluidity by creating a more efficient flow pattern around the arm, reducing turbulence and drag forces during vertical flight operations.
2Object-affected harmful factors
If the UAV arm uses a streamlined teardrop shape to reduce air resistance, then air fluidity is optimized, but the structural complexity increases
Solution Approach 1:
The arm structure uses consistent parameters throughout its design: the wall thickness remains uniform, the hollow interior maintains a constant cross-sectional shape, and the radius of curvature ratios are maintained consistently. This parameter consistency simplifies manufacturing while achieving the streamlined teardrop shape that reduces air resistance.
3Reliability
If the UAV arm has a larger contact area with air for structural stability, then the durability is improved, but the power consumption increases due to higher air resistance
Solution Approach 1:
The teardrop-shaped cross-section with optimized curved surfaces reduces the effective contact area with air while maintaining structural integrity. The hollow interior provides structural strength, and the streamlined outer shape minimizes drag, thereby reducing power consumption during liftoff and landing without compromising durability.
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
The teardrop-shaped arm structure enhances air fluidity, increases durability, and improves the flight efficiency of UAVs by reducing power consumption and air resistance, thereby extending flight time.
Implementation Method 1
The UAV arm comprises a longitudinal tube having an inverted teardrop shape-cross section... The UAV arm with the inverted teardrop shape-cross section is able to optimize the air fluidities that significantly lowers the power consumption during liftoff
Data Source
AI summary
Arms and an associated unmanned aerial vehicle (UAV) are disclosed, which include a connecting component, a frame and arms. Each arm includes a longitudinal tube having an inverted teardrop shape-cross section with a hollow interior. The upper end of the longitudinal tube is a first curved surface. The lower end of the longitudinal tube is a second curved surface. The arc length of the first curved surface is greater than the arc length of the second curved surface. The connecting component connects the arm to the frame, and comprises an installing component and a mounting component. The installing component and the mounting component are mounted on two respective ends of the arm. The frame of UAV and the driving assembly are connected through the arm. Compared to circular shape, the raindrop/half lemniscate shape is more streamlined than those having a circular cross-sectional shape, resulting in substantially improved air fluidities.