Motor Mount Damper Assembly for Compact UAV Vibration Isolation
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) face interference from motor vibrations, which affect sensors and navigation, and existing solutions for 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 and allowing for easy replacement, while adjusting stiffness and durometer for optimal performance.
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 complexity and space requirements increase
Solution Approach 1:
The patent combines the dampening material, mounting structure, and compression mechanism into a single integrated damper assembly. The elastomeric dampening material is directly contained within the motor mount structure, eliminating the need for separate springs and attachment mechanisms. This merging reduces device complexity while maintaining vibration dampening effectiveness.
Solution Approach 2:
The motor mount structure serves multiple functions: it provides structural support for the motor, integrates the vibration dampening material, and includes compression features. This multi-functionality eliminates the need for separate dampening components, reducing overall device complexity while addressing vibration issues.
2Object-affected harmful factors
If elastomers are attached directly to a motor by adhesive, then vibration dampening is achieved, but manufacturing reliability and long-term durability deteriorate
Solution Approach 1:
The patent replaces adhesive bonding with a mechanical compression system. The elastomeric dampening material is held in place through compression forces applied by the motor fins and plate, rather than relying on adhesive bonds. This mechanical retention method improves reliability by eliminating adhesive degradation issues.
Solution Approach 2:
The compression mechanism uses the motor's own fins to apply force and secure the dampening material in place. The system is self-retaining, with the motor structure itself providing the compression force needed to hold the elastomer, eliminating the need for separate fastening mechanisms or adhesives.
3Volume of moving object
If a compact dampener is designed for limited space, then space and weight are reduced, but manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The damper assembly is designed as a modular unit with distinct components (motor mount, dampening material, plate) that can be manufactured separately and assembled together. The indentations and slots are segmented features that guide assembly, allowing for easier manufacturing and assembly despite the compact size.
Solution Approach 2:
The plate serves as an intermediary component that applies compression force to secure the dampening material. This intermediate element simplifies assembly by providing a straightforward compression mechanism, allowing the compact dampener to be manufactured and assembled easily despite space constraints.
4Ease of repair
If the damper is made serviceable and reversible, then ease of repair and replacement are improved, but the structural integrity and vibration dampening effectiveness may worsen
Solution Approach 1:
The compression mechanism is designed to be dynamically adjustable, allowing the plate to be removed and reinstalled to apply or release compression force. This dynamic design enables easy serviceability while maintaining the ability to achieve proper compression and vibration dampening effectiveness when assembled correctly.
Solution Approach 2:
The compression force applied to the dampening material can be adjusted by changing the plate thickness or compression amount. This parameter adjustment capability allows the reversible design to maintain optimal vibration dampening effectiveness while enabling easy replacement and servicing of the damper assembly.
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, enhancing UAV performance and reliability by minimizing space usage and avoiding manufacturing issues, with adjustable properties for varying UAV requirements.
Implementation Method 1
a durometer and stiffness of the elastomer may be adjusted
Implementation Method 2
motor driving a spinning high inertial mass, i.e., a propeller, will impart vibrations on the fuselage during flight
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.