Beam-Node Vibration Isolating Structure Using Anti-Resonance
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Solution Overview
Problem
Conventional vibration isolating structures require piezoelectric sensors and actuators, and control circuits to suppress vibrations, which is not efficient for reducing vibrations transmitted from a vibration exciter to a vibration receiver.
Innovation Solution
A vibration isolating structure comprising a first beam connected to a vibration exciter via a support, a second beam connected to a vibration receiver via another support, and a node that connects the ends of these beams, where the node's rotational displacement is excited by translational displacement of the exciter, exhibiting anti-resonance within a specific frequency range to reduce vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If piezoelectric sensors, actuators, and control circuits are used to suppress vibration, then vibration suppression capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the complex control system components (piezoelectric sensors, actuators, and control circuits) from the vibration suppression system. Instead, it uses a passive mechanical structure with specific geometric configuration that inherently provides vibration isolation through its structural properties, thereby achieving vibration suppression without complex active control systems
Solution Approach 2:
The vibration isolation structure utilizes its own structural characteristics and natural mechanical properties to achieve vibration suppression. The system serves itself by leveraging the inherent damping and stiffness characteristics of the geometric configuration, eliminating the need for external control systems, sensors, and power sources
2Reliability
If multiple components (sensors, actuators, control circuit) are used for vibration control, then vibration suppression is improved, but ease of operation and maintenance deteriorate
Solution Approach 1:
The patent removes all operational components requiring control, maintenance, or calibration (sensors, actuators, control circuits) and replaces them with a passive structural solution that requires no operation or maintenance, thereby dramatically improving ease of operation
Solution Approach 2:
The structure automatically provides vibration isolation through its inherent mechanical properties without requiring any operational intervention, adjustment, or maintenance, making it extremely easy to operate and maintain
3Device complexity
If a simple beam connection is used, then device complexity is reduced, but vibration isolation performance deteriorates
Solution Approach 1:
The patent applies specific geometric configuration characteristics to the beam connection structure, creating local structural features (specific angles, lengths, and node positions) that provide enhanced vibration isolation performance. This localized geometric optimization allows simple structural forms to achieve sophisticated vibration control functions
Solution Approach 2:
The patent utilizes mechanical vibration principles by designing the beam connection structure to exhibit specific vibrational characteristics, including anti-resonance frequencies and mode shapes that naturally isolate vibrations. The geometric configuration is optimized to create favorable vibration patterns that reduce force transmission
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 configuration allows for effective reduction of vibration transmission between the exciter and receiver by exhibiting anti-resonance at a frequency within the range higher than the first resonance frequency and lower than the second resonance frequency, thereby minimizing vibration transfer.
Implementation Method 1
A rotational displacement of the node is excited by a translational displacement of the vibration exciter and a translational displacement of the node associated with the translational displacement of the vibration exciter
Implementation Method 2
exhibits anti-resonance at a frequency within a frequency range higher than a first resonance frequency and lower than a second resonance frequency of the vibration isolating structure
Data Source
AI summary
The node is located on a first position side of the vibration exciter or a second position side of the vibration receiver with respect to the one end of the first beam and the one end of the second beam in an axial direction of an axis passing through the first position and the second position. A rotational displacement of the node is excited by a translational displacement of the vibration exciter and a translational displacement of the node associated with the translational displacement of the vibration exciter, and exhibits anti-resonance at a frequency within a frequency range higher than a first resonance frequency of the vibration isolating structure and lower than a second resonance frequency.