Electromagnetic Vibration Absorber for Steering Wheels
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Solution Overview
Problem
Existing vibration absorbers for steering wheels are ineffective in absorbing strong vibrations across a broad frequency band, particularly non-discrete vibrations, and fail to provide directional vibration reduction at various angular positions.
Innovation Solution
A vibration absorber comprising a supporting device, an oscillating mass, at least one coil device with windings, and a permanent magnet device, where the permanent magnet generates a magnetic field through a yoke device and windings, allowing forces to act at an angle other than 0°, enabling independent force generation in multiple directions for effective vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vibration absorbers are used in steering wheels, then they can absorb some vibrations, but they are ineffective in absorbing strong vibrations across a broad frequency band and fail to provide directional vibration reduction
Solution Approach 1:
The patent implements active dynamic control by replacing fixed passive elements with controllable actuators. The electromagnetic actuators can dynamically adjust their output forces in real-time based on vibration characteristics, enabling the system to adapt to varying vibration frequencies, amplitudes, and directions. This dynamic capability allows effective absorption of strong vibrations across a broad frequency band while providing directional vibration reduction at various angular positions.
Solution Approach 2:
The patent changes key system parameters from fixed to variable. The electromagnetic actuators can vary their force magnitude and direction independently, allowing the system to modify absorption parameters dynamically. This parameter variability enables the vibration absorber to handle different vibration scenarios effectively, including strong vibrations across broad frequency bands and directional vibration reduction, resolving the contradiction between reliability and adaptability.
2Device complexity
If passive vibration absorption is used, then the device structure is simple, but it cannot effectively absorb strong vibrations across a broad frequency band
Solution Approach 1:
The patent replaces purely mechanical passive elements with electromagnetic actuators that can generate controlled forces. This substitution introduces active control capability while maintaining a relatively compact structure. The electromagnetic actuators can generate sufficient force to absorb strong vibrations across a broad frequency band, significantly improving vibration absorption effectiveness compared to passive mechanical systems, while the overall device structure remains manageable.
Solution Approach 2:
The electromagnetic actuator design provides multi-functionality by combining force generation, direction control, and frequency adaptation in a single component. This universal approach allows the system to handle various vibration types and intensities effectively, achieving broad frequency band absorption and directional control without requiring multiple specialized passive components, thus balancing device complexity with improved reliability.
3Device complexity
If traditional coil arrangements are used, then the structure is straightforward, but forces act in limited directions and cannot reduce vibrations at various angular positions
Solution Approach 1:
The patent transitions from single-direction force generation to multi-directional force control by arranging electromagnetic actuators in specific geometric configurations. This spatial arrangement enables forces to be generated in multiple directions, allowing the system to counteract vibrations at various angular positions. The dimensional enhancement in force vector control directly improves angular position vibration reduction capability while maintaining a structured coil arrangement.
Solution Approach 2:
The patent divides the force generation function into multiple independent electromagnetic actuators, each capable of generating force in its own direction. This segmentation allows independent control of each actuator, enabling the system to synthesize forces in various directions by coordinating multiple actuators. The segmented approach provides versatile angular position vibration reduction while keeping each individual coil arrangement relatively simple and straightforward.
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 solution enables efficient absorption of vibrations in all directions, including non-discrete vibrations, across a broad frequency band, and allows for the reduction of vibrations at any steering wheel angular position, enhancing the absorber's versatility and effectiveness.
Implementation Method 1
A permanent magnet of the permanent magnet device generates a magnetic field extending through a yoke device of the permanent magnet device and through a part of the windings
Implementation Method 2
when current flows through the windings in a suitable manner, two forces are generated that act between the supporting device and the permanent magnet device
Data Source
AI summary
A vibration absorber comprising a supporting device, an oscillating mass, at least one coil device, and at least on permanent magnet device. The coil device includes at least one winding. A permanent magnet of the permanent magnet device generates a magnetic field extending through a yoke device of the permanent magnet device and through a part of the windings such that when current flows through the windings in a suitable manner, two forces are generated that act between the supporting device and the permanent magnet device and include an angle unequal to 0°.