Compact Resonator Mount for Helicopter Vibration Damping
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Solution Overview
Problem
Existing vibration damping systems for rotary-wing aircraft, such as helicopters, face challenges in effectively mitigating vibrations at the primary frequency while minimizing space usage and maintaining passenger comfort, as they often require significant space for components like pivots and pads, and active systems are difficult to adjust for optimal performance.
Innovation Solution
A compact vibration damping device featuring a resonator mechanism with elastically deformable branches and a beater that dissipates vibrations without joints, allowing for reduced size and weight, and can be adapted to various frequencies and applications, including use under passenger feet or equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional passive vibration damping devices with pivots are used, then vibration filtering is effective, but the device occupies significant space and raises the floor by several centimeters
Solution Approach 1:
The invention extracts and eliminates the pivot joints from the vibration damping device, replacing them with a direct elastic connection between the resonator and the support structure. This removal of unnecessary components reduces the device volume while maintaining the vibration damping function through the elastic branches of the resonator.
Solution Approach 2:
The invention uses elastic branches (flexible elements) as the connection between the resonator mass and the support structure. These flexible branches replace rigid pivot connections, enabling vibration isolation while occupying minimal space and avoiding the need for large pivot joints, thus reducing the overall device volume.
2Reliability
If active vibration damping systems (AVCS) are used, then vibration mitigation throughout the cabin is achieved, but the system is difficult to adjust for optimal performance and hard to integrate into restricted space
Solution Approach 1:
The invention employs a passive resonator-based vibration damping mechanism that naturally targets specific vibration frequencies (including the primary frequency of helicopter rotors) without requiring active control systems. The resonator's natural frequency is tuned to match problematic vibration frequencies, providing effective damping through pure mechanical resonance principles, eliminating the need for complex electronic adjustment.
Solution Approach 2:
The passive resonator system automatically adapts to vibration conditions without requiring external control or adjustment. The resonator mass and elastic branches form a self-regulating system that naturally counteracts vibrations at its resonant frequency, eliminating the need for complex adjustment mechanisms found in active systems.
3Reliability
If resonators with pivots are used, then vibration filtering is effective, but the pivots take up non-negligible space of several centimeters
Solution Approach 1:
The invention completely removes the pivot joints from the resonator structure, replacing them with elastic branches that directly connect the resonator mass to the support. This extraction of unnecessary pivot components eliminates the several-centimeter space requirement while maintaining vibration filtering effectiveness through the elastic deformation of the branches.
Solution Approach 2:
The elastic branches serve as flexible connections that replace rigid pivot joints. These thin, flexible elements provide the necessary rotational and vibrational freedom for the resonator while occupying minimal space, thereby eliminating the need for large pivot dimensions.
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 provides effective vibration reduction at specific frequencies, such as the primary frequency of a helicopter, while minimizing space and weight, and can be integrated into existing systems to enhance comfort and equipment longevity without the need for extensive adjustments or maintenance.
Implementation Method 1
a resonator mechanism comprising at least one resonator, the at least one resonator having at least one beater... the at least one resonator comprises in particular a beater called a first beater extending from an end embedded at a free beating end... the base being elastically deformable
Implementation Method 2
The base (30) and at least the arm (26) of the first beater (25) can form a monolithic assembly of a single flat unit... the base being elastically deformable
Data Source
AI summary
A vibration damping device equipped with a resonator mechanism comprising at least one resonator, the at least one resonator having a first beater extending from an embedded end to a free beating end. The resonator consists of an elastically deformable base equipped with a first branch and a second branch connected by a central section, the embedded end being embedded at the first branch, the first branch extending from a first end to a second end each rigidly fastened to a mount, the second branch extending from a first end section to a second end section each rigidly fastened to a vibration source.