UAV Lightweight Guard Frame Structure for Safety and Flight Time
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) face a trade-off between safety and flight performance due to the weight increase caused by guard frames intended to protect users and objects from propeller damage, which can reduce flight time and efficiency.
Innovation Solution
A lightweight guard frame structure that includes a first guard grill and a second guard grill to form an external structure, allowing partial coverage of propellers while minimizing additional weight and enhancing flight control performance by offsetting motor forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guard frame is added to surround the propeller to prevent contact with external objects, then safety is improved, but weight increases and flight performance deteriorates
Solution Approach 1:
The guard frame is divided into multiple separate bars rather than a continuous enclosure. This segmentation provides safety coverage while significantly reducing the amount of material and overall weight compared to a complete guard frame structure.
Solution Approach 2:
The guard frame bars are positioned at specific critical locations where propeller contact with external objects is most likely to occur. This localized protection approach provides safety where needed while minimizing weight addition across the entire structure.
2Reliability
If a guard frame is added to surround the propeller to prevent contact with external objects, then safety is improved, but flight time is reduced
Solution Approach 1:
The segmented bar structure reduces overall weight compared to a complete guard frame, directly improving flight time by reducing the power consumption required for flight operations.
Solution Approach 2:
The guard frame provides partial coverage rather than complete enclosure, using only the necessary amount of structure to achieve safety goals without the excess weight that would reduce flight time.
3Reliability
If a guard frame is added to surround the propeller, then protection is improved, but device complexity increases
Solution Approach 1:
The guard frame is implemented as multiple independent bars rather than a complex continuous structure, simplifying manufacturing, assembly, and maintenance while providing adequate protection.
Solution Approach 2:
The unnecessary portions of a complete guard frame are removed, keeping only the essential bars that provide protection. This extraction of non-essential elements reduces structural complexity while maintaining safety functionality.
Data Source
AI summary
An unmanned aerial vehicle (UAV) is provided. The UAV includes a first guard grill, a second guard grill configured to be removably combined with the first guard grill and form an external structure and an inner space of the UAV with the first guard grill, a housing configured to include a central portion located in the center of the inner space and embed a processor and a navigation system, one or more propelling elements configured to be located the inner space and be disposed around the central portion, and a plurality of motor assemblies configured to be located in the inner space and drive the propelling elements while being electrically connected with the processor. When viewed from the outside of the external structure, the propelling elements are partially covered by at least one of the first guard grill or the second guard grill.