Structure-Borne Sound Exciter for Active Vibration Absorption
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Solution Overview
Problem
Existing vibration damping systems face challenges with precision due to delays in corrective actions and have complex designs with high material and maintenance costs.
Innovation Solution
An active vibration absorption system utilizing a single structure-borne sound exciter that detects and absorbs vibrations simultaneously, eliminating the need for additional sensors and allowing continuous control of vibrations through a control device that differentiates between detection and control components in the measurement signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate sensor and actuator are used for vibration detection and damping, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the sensor and actuator functions into a single structure-borne sound exciter. The exciter both detects vibrations through its natural response and generates counter-vibrations for damping, eliminating the need for separate components while maintaining functional precision.
Solution Approach 2:
The structure-borne sound exciter serves multiple functions: it acts as both the sensing element (detecting vibrations through its mechanical response) and the actuating element (generating counter-vibrations when driven by coil current), making it a universal component that replaces traditional separate sensor-actuator systems.
2Measurement precision
If separate sensors and actuators are used, then measurement precision is improved, but installation space increases
Solution Approach 1:
By merging the sensor and actuator into one structure-borne sound exciter component, the patent significantly reduces the installation space required. The single integrated component occupies minimal space compared to traditional systems requiring separate mounting locations for sensors and actuators.
3Measurement precision
If separate sensors and actuators are used, then measurement precision is improved, but weight increases
Solution Approach 1:
The integration of sensor and actuator functions into a single structure-borne sound exciter eliminates the weight of additional separate components, wiring, and mounting hardware, resulting in a significantly lighter overall system while maintaining precise vibration detection and damping capabilities.
4Measurement precision
If separate sensors and actuators are used, then measurement precision is improved, but maintenance costs increase
Solution Approach 1:
By combining the sensor and actuator into a single structure-borne sound exciter, the patent reduces the number of components that can fail and require maintenance. The simplified system with fewer parts results in lower maintenance costs and easier repair procedures compared to complex multi-component systems.
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 enables precise and efficient damping of vibrations with reduced installation space, weight, and costs, minimizing disruptive acoustic phenomena and eliminating the need for complex designs.
Implementation Method 1
having an electrical coil for moving the coupling element by means of a coil current
Implementation Method 2
The structure-borne sound exciter is configured to detect the induced voltage in the electrical coil and to provide a measurement signal that is correlated with the detected induced voltage
Data Source
AI summary
The disclosure relates to an active vibration absorption system for absorbing the vibrations of a vibrating element. The vibration absorption system comprises a structure-borne sound exciter having a coupling element for coupling to the vibrating element and having an electrical coil for moving the coupling element by means of a coil current. The structure-borne sound exciter is designed to provide a measurement signal correlated with a detected induced voltage. Furthermore, the vibration absorption system comprises a control device, which is designed to identify a target current intensity of the coil current in accordance with the measurement signal and to control an actual current intensity of the coil current to the target current intensity. The target current intensity is designed to adjust the motion of the coupling element in such a way that the vibrations of the element are at least partly absorbed. Moreover, the control device is designed to identify a detection component and a control component from the measurement signal and to identify the target current intensity in accordance with the detection component.