Active Tuned Mass Damper With Integral Joints
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Solution Overview
Problem
Active vibration dampers require complex structures and additional guides to manage vibrations in multiple directions, leading to inefficiencies and increased mass, which complicates control and increases the risk of losses due to unnecessary coupling points.
Innovation Solution
The design incorporates stiff movable connections that generate restoring forces in orthogonal directions, allowing for a compact and simple structure with a common absorber mass, eliminating the need for complex guides and minimizing unnecessary coupling points by using integral joints and plunger coil actuators with linear guides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex guides and additional actuators are used to manage vibrations in multiple directions, then vibration reduction capability is improved, but device complexity and absorber mass increase
Solution Approach 1:
The movable connections are designed to perform multiple functions simultaneously: they guide the actuators in their direction of movement while also generating restoring forces in orthogonal directions. This multi-functionality eliminates the need for separate guides and additional actuators, reducing device complexity while maintaining vibration reduction capability in multiple directions
Solution Approach 2:
The patent combines the guiding function and the restoring force generation function into a single movable connection structure. By merging these previously separate functions, the system achieves multi-directional vibration control without requiring complex guide mechanisms or additional actuators, thus simplifying the overall device structure
2Reliability
If additional guides and coupling points are added to manage multi-directional vibrations, then vibration control is improved, but energy losses increase
Solution Approach 1:
The patent extracts and eliminates unnecessary coupling points from the system by integrating the restoring force generation directly into the movable connections. By removing these intermediate coupling elements, the system reduces energy losses while maintaining effective vibration control through the direct action of the actuators
3Device complexity
If a common absorber mass is used for multi-directional vibration reduction, then device simplicity is improved, but precise actuator positioning becomes difficult
Solution Approach 1:
The movable connections are designed to simultaneously provide precise positioning for actuators in their direction of movement and generate restoring forces in orthogonal directions. This multi-functional design ensures that even with a common absorber mass, the actuators maintain precise relative positions while the system remains structurally simple
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 enables efficient vibration reduction in multiple directions with a reduced absorber mass, improved control, and minimized self-damping, resulting in a robust and maintenance-friendly active damper with enhanced performance and adaptability.
Implementation Method 1
the movable connections are each stiff in the direction of movement of the actuator to which they are connected, and generate restoring forces in the other direction of movement
Implementation Method 2
the actuator currently executing an actuating movement also contributes to the absorber mass, which is then formed by the moving mass of the actuator executing the actuating movement, the total mass of the non-actuated actuator and the connecting element
Data Source
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AI summary
The damper has two actuators (2, 3) which act in different movement directions and a mounting device, where the actuators have two mounting sections (11, 12, 13, 14). The actuators are connected with the mounting device in the mounting section (11, 12) over leaf springs (4, 5) and are coupled with one another in the mounting section (13, 14) by a rigid connecting unit (9). Each actuator has static and movable units (7, 8), where the section (11, 12) is arranged in the unit (7) and the section (13, 14) is arranged in the unit (8), respectively.