Active Vibration Isolation Mount with Delayed Spring Force
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Solution Overview
Problem
Current vibration isolation methods, such as those using elastomeric materials, fail to effectively reduce vibration transmission at high frequencies and are temperature-sensitive, while replacing them with classical spring stiffness materials leads to high vibration transmission at resonance frequencies, making it difficult to achieve long service life with adequate damping.
Innovation Solution
An active vibration isolation mount is introduced, featuring a spring arrangement that provides a delay in vibration transmission, coupled with sensing and force application mechanisms to actively control vibrations, utilizing a spring means with consistent stiffness across frequencies and incorporating feedback and feedforward control systems to manage resonance and broadband isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastomeric material is used for vibration isolation, then isolation performance is achieved, but temperature sensitivity compromises performance
Solution Approach 1:
The composite structure combines elastomeric material with viscoelastic material, where the viscoelastic component is specifically selected to compensate for temperature-dependent stiffness changes. The viscoelastic layer maintains consistent damping properties across a wider temperature range, offsetting the elastomer's temperature sensitivity and improving overall reliability.
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 active vibration isolation mount effectively reduces vibration transmission across a wide frequency range, mitigating resonance issues and providing efficient broadband isolation while maintaining structural support, thus improving vibration control in applications like aircraft cabin noise reduction.
Implementation Method 1
A spring means is arranged between the first and second mounting means, wherein said spring means is coupled to the first mounting means and provides a spring force between said first and second mounting means
Data Source
AI summary
The present invention provides an apparatus and method for vibration isolation. The invention may be conceptualized as a vibration isolation mount. The vibration isolation mount mounts a first member to a second member for reducing the transmission of vibrations from the first member to the second member. The vibration isolation mount comprises a first mounting means for mounting to the first member, and a second mounting means for mounting to the second member. A spring means is arranged between the first and second mounting means, wherein said spring means is coupled to the first mounting means and provides a spring force between said first and second mounting means. The invention may also be conceptualized as a vibration isolation method. The method controls vibrations transmitted from a first member to a second member when the second member is mounted on the first member using a spring arrangement. The spring arrangement provides a delay in transmission of an impulse between the first and second members. The method comprising the steps of (1) sensing vibrations in a first member; (2) applying a force on a second member in response to the sensed vibrations to reduce vibrations in the second member; and (3) wherein the spring arrangement provides a delay equal to or greater than a delay in the provision of said force in response to the vibrations in said first member.