UAV Gimbal Shock Ball Layout for Rotational Vibration Isolation
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Solution Overview
Problem
The existing gimbal systems in UAVs experience vibration coupling due to the far distance between the center of gravity and the centroid of shock absorption balls, leading to adverse effects on control and stabilization.
Innovation Solution
The gimbal system is designed with shock absorption balls whose geometric centers form an oblique plane relative to the horizontal direction, ensuring the centroid is close to or coincides with the gimbal's center of gravity, reducing rotational vibrations and improving vibration isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shock absorption balls are mounted above the gimbal to isolate vibration, then high-frequency vibration attenuation is improved, but the gimbal generates rotational vibration due to the far distance between center of gravity and centroid of shock absorption balls
Solution Approach 1:
The patent changes the spatial arrangement of shock absorption balls from a horizontal plane to an oblique plane relative to the horizontal direction. This dimensional change in positioning allows the centroid to coincide with the center of gravity, eliminating rotational vibration while preserving vertical vibration isolation functionality.
Solution Approach 2:
The patent employs asymmetric positioning of shock absorption balls where at least one ball is located below the horizontal plane passing through the center of gravity, while others are above. This asymmetric vertical distribution creates an oblique geometric plane that aligns the centroid with the center of gravity, resolving the rotational vibration issue.
2Device complexity
If the centroid of shock absorption balls is far from the center of gravity, then vibration isolation structure is simplified, but vibration coupling occurs during horizontal UAV movement
Solution Approach 1:
The patent transitions from a two-dimensional horizontal arrangement to a three-dimensional oblique arrangement of shock absorption balls. By positioning balls at different vertical levels (above and below the horizontal plane), the system achieves centroid-center of gravity alignment without significantly increasing structural complexity.
Solution Approach 2:
The patent changes the positional parameters of shock absorption balls from horizontal coordinates only to include vertical coordinates, creating an oblique geometric plane. This parameter change enables the centroid to coincide with the center of gravity, eliminating vibration coupling while maintaining structural simplicity.
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 configuration effectively reduces rotational vibrations and enhances stabilization by minimizing the distance between the centroid and center of gravity, thereby improving the gimbal's control effect and reducing collisions with other UAV components.
Implementation Method 1
A common way to reduce vibration of the stabilizing gimbal is to use shock absorption balls above the gimbal to isolate vibration
Data Source
AI summary
A gimbal includes a photographing device, a support assembly carrying the photographing device, a connection assembly connected to the support assembly, and a plurality of shock absorption balls mounted at the connection assembly and configured to connect the gimbal to a vehicle body of an unmanned aerial vehicle (UAV). A geometric plane where geometric centers of the plurality of shock absorption balls are located is oblique relative to a horizontal direction.