Active Vibration Absorber Using Magnetic Force Control

Solution Overview

Problem

Conventional vibration absorbing devices passively attenuate vibration energy using rubber materials, failing to actively absorb and feedback vibrations effectively, which leads to incomplete noise reduction in mechanical systems like ships with engine facilities.

Innovation Solution

An active control type vibration absorbing device utilizing a first and second magnetic force generation member, where the direction and magnitude of the magnetic force can be controlled to actively absorb vibrations, using a solenoid coil and permanent magnet setup with sensor units and a controller to manage current flow and magnetic interactions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If rubber materials are used for vibration absorption, then the device structure is simple and easy to manufacture, but the vibration energy can only be partially attenuated and cannot be actively absorbed

Engineering Contradiction:

Improveease of manufactureVSAvoidvibration absorption effectiveness

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces the passive mechanical rubber material system with an active electromagnetic control system. Magnetic force generation members (electromagnets) are used to generate controllable magnetic forces that actively counteract vibrations, substituting the passive mechanical attenuation mechanism with an active electromagnetic control mechanism, thereby significantly improving vibration absorption effectiveness.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent incorporates vibration sensors that detect vibration signals from the vibration source and feed them back to a controller. The controller processes these signals and adjusts the current to the magnetic force generation members in real-time, creating a closed-loop feedback system that enables active adaptation to varying vibration conditions, thus improving absorption reliability.

Inventive Principle:

Principle #23Feedback

2Device complexity

If passive attenuation using rubber materials is used, then the device complexity is low, but the vibration absorption capability is insufficient for active control requirements

Engineering Contradiction:

Improvedevice complexityVSAvoidvibration absorption capability

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent replaces the simple passive rubber material system with a complex active electromagnetic control system comprising magnetic force generation members, vibration sensors, and a controller. This substitution transforms the device from passive attenuation to active control, dramatically improving vibration absorption capability despite increased complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent enables the vibration absorption device to autonomously detect and respond to vibrations through integrated sensors and controllers that automatically adjust magnetic forces based on real-time vibration signals, eliminating the need for external manual intervention and achieving self-regulating active control.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If conventional vibration absorbing members are used, then the installation is simple, but the vibration energy cannot be actively absorbed and feedback is not provided

Engineering Contradiction:

Improveease of operationVSAvoidactive control capability

Core Design Contradiction:

Ease of operationVSExtent of automation

Solution Approach 1:

The patent incorporates vibration sensors that detect vibration signals from the vibration source and feed them back to a controller. The controller processes these signals and adjusts the current to the magnetic force generation members in real-time, creating a closed-loop feedback system that enables active adaptation to varying vibration conditions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent enables the vibration absorption device to autonomously detect and respond to vibrations through integrated sensors and controllers that automatically adjust magnetic forces based on real-time vibration signals, eliminating the need for external manual intervention and achieving self-regulating active control.

Inventive Principle:

Principle #25Self-service

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 device effectively senses and actively absorbs vibrations in real-time, reducing noise and vibration transmission by adjusting magnetic forces to counteract the vibration source's impact, enhancing noise reduction efficiency.

Implementation Method 1

the direction and magnitude of a magnetic force of one of the first magnetic force generation member and the second magnetic force generation can be controlled such that the second magnetic force generation member can move in a direction for attenuating the vibration of the vibration source

Methodology Applied

Scientific EffectMagnetic force: Magnetism

Implementation Method 2

One of the first magnetic force generation member and the second magnetic force generation member may be a permanent magnet body and the other is a solenoid coil body

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS8853976B2Active control type of vibration absorbing device

Publication Date: 2014.10.07 KOREA INST OF MACHINERY & MATERIALS

AI summary

The present invention provides a vibration absorbing device. A vibration absorbing device according to an exemplary embodiment of the present invention includes a first magnetic force generation member fixed to an external portion that is separated from a vibration source and a second magnetic force generation member provided in one side of the vibration source. When vibration is generated by the vibration source, the direction and magnitude of a magnetic force of one of the first magnetic force generation member and the second magnetic force generation can be controlled such that the second magnetic force generation member can move in a direction for attenuating the vibration of the vibration source.