Motor Mount Damper Structure for Adhesive-Free UAV Vibration Control
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) face vibration interference from electric motors, which affect sensors and navigation, and existing solutions for motor vibration dampening are either unreliable or require significant space and weight, particularly in compact UAV designs.
Innovation Solution
A self-encapsulated damper system with alternating indentations and slots, integrated into a motor mount, uses fins from the motor to compress the damper against tabs, providing effective vibration dampening without adhesives, allowing for easy replacement and adjustment of stiffness for rotation, thrust, and yaw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dampening material is attached via a spring, then motor vibrations are dampened, but the device occupies significant space and adds weight
Solution Approach 1:
The damper is merged with the motor mount structure, integrating the vibration dampening function into the existing mounting components. The motor mount itself is designed with features that provide dampening capability, eliminating the need for separate dampening components and reducing overall weight.
Solution Approach 2:
The motor mount serves multiple functions: it provides structural support for the motor, enables vibration dampening through integrated elastomeric features, and facilitates thermal management. This multi-functionality reduces the need for additional components, thereby reducing weight.
2Object-affected harmful factors
If a dampening material is attached via a spring, then motor vibrations are dampened, but the device occupies significant space
Solution Approach 1:
The dampening function is merged into the motor mount structure itself. The elastomeric features are integrated into the mounting brackets or base, utilizing the existing space between the motor and the drone body, rather than requiring separate dampening components that would occupy additional space.
Solution Approach 2:
The elastomeric dampening features are nested within the motor mount structure, fitting into the available space between the motor housing and the drone airframe. This nesting approach allows the damper to occupy minimal additional space while still providing effective vibration isolation.
3Object-affected harmful factors
If elastomers are attached directly to a motor by an adhesive, then motor vibrations are dampened, but manufacturing and long-term reliability issues arise
Solution Approach 1:
The adhesive attachment method is extracted and replaced with a mechanical attachment system. The elastomeric dampers are secured to the motor mount using mechanical features such as recesses, clips, or interference fits, which provide more reliable and durable attachment compared to adhesives, especially in the vibration environment of a drone.
Solution Approach 2:
The motor mount structure provides its own attachment mechanism for the elastomeric dampers through integrated mechanical features. The design allows the dampers to be self-retaining or easily attachable without requiring external adhesives or complex assembly procedures, improving both manufacturing ease and long-term reliability.
4Object-affected harmful factors
If elastomers are attached directly to a motor by an adhesive, then motor vibrations are dampened, but manufacturing issues arise
Solution Approach 1:
The adhesive application process is extracted and replaced with mechanical attachment features that are integrated into the motor mount design. This eliminates the need for adhesive application, curing time, and quality control processes associated with adhesives, simplifying manufacturing.
Solution Approach 2:
The attachment method is changed from chemical (adhesive) to mechanical (physical features). This parameter change in the attachment mechanism simplifies the manufacturing process, as mechanical features can be formed during molding or machining of the motor mount, requiring no additional manufacturing steps.
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 solution effectively reduces motor-induced vibrations in UAVs, enhancing performance and reliability by using minimal space and weight, while allowing for independent adjustment of stiffness to optimize vibration absorption.
Implementation Method 1
a damper, the damper having: two or more indentations on alternating sides of the damper, where each indentation may be open to an outer circumferential surface of the damper and may extend partially through a width of the damper; and one or more slots, where each slot may be open to an inner circumferential surface of the damper and may extend at least partially through the width of the damper
Data Source
AI summary
A system having a damper with six or more indentations on alternating sides of the damper, where each indentation is open to an outer circumferential surface of the damper and extends over halfway through a width of the damper, and six or more slots, each slot open to an undulating inner circumferential surface of the damper and extending through the width of the damper.