Active Vibration Control Device Using Strain Energy Optimization
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Solution Overview
Problem
Existing active vibration control devices require specialized design and long development times, leading to high costs and inefficiencies in suppressing vibrations in devices like HDDs and electronic microscopes, due to the need for tailored piezoelectric elements and complex strain distribution analysis.
Innovation Solution
A vibration control device with multiple identical detection and generation units, using an optimization method to determine the placement of these units based on strain energy distribution, allowing for efficient and quick design with standardized components and reduced calculation time, even for complex structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If specialized piezoelectric elements with optimized inclination characteristics are used to improve vibration control performance, then vibration suppression effectiveness is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent changes the key parameter from piezoelectric inclination characteristics to piezoelectric output characteristics. By selecting piezoelectric elements based on their output characteristics rather than inclination characteristics, the design process is simplified while maintaining effective vibration control performance.
Solution Approach 2:
The patent applies piezoelectric elements at specific locations on the vibration source where they can most effectively suppress vibrations. By strategically positioning a limited number of elements based on vibration mode analysis, the solution achieves effective vibration control without requiring complex customized elements throughout the entire structure.
2Reliability
If tailored piezoelectric elements are designed for each application target, then vibration control effectiveness is improved, but development time increases
Solution Approach 1:
The patent establishes a universal design methodology that can be applied to various vibration control applications without requiring custom-tailored piezoelectric elements for each case. The method uses standardized elements with selection based on output characteristics, making the solution broadly applicable and reducing development time across different applications.
Solution Approach 2:
The patent uses a standardized design approach that can be replicated across different applications. By documenting the selection criteria based on output characteristics and the placement methodology, the same design process can be copied and applied to various vibration control problems without starting from scratch each time.
3Reliability
If strain distribution analysis is performed to optimize piezoelectric element placement, then vibration control performance is improved, but calculation time and computational resources increase
Solution Approach 1:
The patent extracts only the essential information needed for optimization - the vibration modes and their corresponding strain distributions - without requiring complete detailed strain analysis throughout the entire structure. By focusing on the critical vibration modes and their strain characteristics, the method achieves effective element placement with reduced computational effort.
4Adaptability or versatility
If multiple vibration detection units and generation units are used to cover different vibration modes, then vibration control coverage is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies piezoelectric elements at specific critical locations rather than distributing them uniformly throughout the structure. By concentrating elements where they have the maximum effect on the dominant vibration modes, the solution achieves broad vibration control coverage with a minimal number of units, avoiding unnecessary complexity.
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
This approach significantly shortens design time and cost while maintaining high vibration control performance, enabling effective vibration suppression across various devices with minimal labor and resources.
Implementation Method 1
a vibration detection unit configured to detect vibration of a portion of the target
Implementation Method 2
a vibration generation unit configured to generate strain in a portion of the target
Implementation Method 3
a control unit configured to generate a control signal to determine drive force of the vibration generation unit based on a signal from the vibration detection unit
Data Source
AI summary
Provided is a vibration control device mounted on a structure body of a target where vibration should be damped, including: a vibration detection unit that detects vibration of a portion of the target; a vibration generation unit that generates strain in a portion of the target; and a control unit that generates a control signal to determine drive force of the vibration generation unit based on a signal from the vibration detection unit. In the vibration control device, strain energy distribution of the target is measured or calculated, and setting positions of the vibration detection unit and the vibration generation unit are determined based on an optimization method within a range in which strain energy changes rapidly.