Vibration Damping Apparatus With Displacement Conversion

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Solution Overview

Problem

Conventional vibration damping materials are inadequate for applications requiring secure holding of devices sensitive to or generating vibrations, as they either permit excessive movement (low stiffness) or lack effective damping (high stiffness).

Innovation Solution

A vibration damping apparatus comprising a displacement conversion device, a motion amplifier, and a motion damper, which converts and amplifies vibration-induced displacement in one direction while effectively damping vibrations, maintaining stiffness in the direction of vibration forces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If low stiffness materials are used for vibration damping, then damping characteristics are improved, but structural stability and secure holding capability deteriorate

Engineering Contradiction:

Improvevibration energy dissipationVSAvoidstructural stability

Core Design Contradiction:

Loss of energyVSStability of the object's composition

Solution Approach 1:

The system is divided into three functional segments: a displacement conversion device (converters) that transforms vibration displacement in the first direction to the second direction, a motion amplifier that amplifies the converted displacement, and a motion damper that dissipates the amplified displacement energy. This segmentation allows each component to specialize in one function, achieving both high stiffness in the first direction and effective vibration damping.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The displacement conversion device converts displacement from the first direction (direction of vibration forces) to the second direction (perpendicular direction). By operating in another dimension, the system can maintain high stiffness in the first direction while effectively damping vibrations through the second direction, resolving the contradiction between stiffness and damping.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If high stiffness materials are used for vibration damping, then structural stability is improved, but damping characteristics deteriorate

Engineering Contradiction:

Improvestructural stabilityVSAvoidvibration energy dissipation

Core Design Contradiction:

Stability of the object's compositionVSLoss of energy

Solution Approach 1:

The system separates the stiffness function (performed by the displacement conversion device and motion amplifier in the first direction) from the damping function (performed by the motion damper acting on amplified displacement in the second direction). This allows high stiffness materials to be used while achieving effective vibration damping through the amplified motion in the perpendicular direction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By converting and amplifying displacement in the second direction (perpendicular to vibration forces), the system enables effective damping without compromising stiffness in the first direction. The high stiffness materials maintain structural stability while the amplified motion in another dimension provides the necessary energy dissipation.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of manufacture

If conventional vibration damping materials are used, then ease of manufacture is improved, but device reliability deteriorates due to excessive movement or poor damping

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoiddevice reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The system divides the vibration damping function into three manufacturable components: displacement conversion devices, motion amplifiers, and motion dampers. Each component can be manufactured using conventional techniques, yet their combination provides reliable vibration control that prevents both excessive movement and ensures effective damping, thereby improving device reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The displacement conversion device and motion amplifier act as intermediaries between the vibration source and the damper. This intermediary mechanism allows conventional materials to be used in each component while achieving reliable overall system performance by converting and amplifying motion before damping, ensuring both movement control and effective energy dissipation.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 apparatus provides enhanced damping characteristics while maintaining stiffness, effectively managing vibrations in devices sensitive to or generating them, by amplifying and damping vibrations more efficiently than conventional materials.

Implementation Method 1

a displacement conversion device configured to convert displacement in a first direction into displacement in a second direction, a motion amplifier responsive to displacement in the second direction

Methodology Applied

Scientific EffectDisplacement conversion and amplification: Mechanical Advantage

Implementation Method 2

a motion damper operably connected to the motion amplifier... damping the amplified displacement

Methodology Applied

Scientific EffectVibration damping: Damping

Data Source

PatentUS9194452B2High stiffness vibration damping apparatus, methods and systems

Publication Date: 2015.11.24 AEROSPACE CORP

AI summary

Vibration damping apparatus, systems, objects including such apparatus and systems, and vibration damping methods. The vibration damping involves amplifying a vibration-induced displacement and damping the amplified displacement.