Steer-By-Wire Sliding Bar Alignment for Noise and Sensor Accuracy
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Solution Overview
Problem
Steer-by-wire steering apparatuses face issues with noise generation due to abrasion on the rotation preventer and degradation of sensor accuracy caused by movement or bending of the sliding bar, which affects the sliding bar's rotation and position detection.
Innovation Solution
A steer-by-wire steering apparatus design that includes a housing with a sensor holder and a rotation preventer supported by an elastic member, preventing rotation of the sliding bar and compensating for gaps caused by abrasion, while maintaining sensor accuracy through a magnet holder and sensor assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rotation preventer is used to prevent sliding bar rotation, then sliding bar rotational stability is improved, but noise is generated due to abrasion on the rotation preventer
Solution Approach 1:
A sensor holder is introduced as an intermediary component between the rotation preventer and the sliding bar. The sensor holder includes a long hole that guides the sliding bar's axial movement while the rotation preventer prevents rotation. This intermediary structure separates the rotational constraint function from the sliding guidance function, reducing friction and noise while maintaining rotational stability.
2Ease of operation
If the sliding bar slides axially to enable steering, then steering functionality is improved, but sensor accuracy degrades due to movement or bending of the sliding bar
Solution Approach 1:
The system is segmented into distinct functional components: the sliding bar for axial movement, the rotation preventer for rotational constraint, and the sensor holder with long hole for guided movement. This segmentation allows the sliding bar to move axially for steering while the sensor holder maintains proper alignment and positioning, preventing bending and maintaining sensor accuracy throughout the steering operation.
3Device complexity
If a simple rotation preventer structure is used, then device complexity is reduced, but gap caused by abrasion leads to noise and accuracy degradation
Solution Approach 1:
The sensor holder acts as a mediator that compensates for wear gaps without requiring complex adjustment mechanisms. The long hole in the sensor holder provides inherent guidance that maintains proper positioning even as abrasion occurs, eliminating noise and accuracy degradation while keeping the overall structure relatively 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
The solution effectively reduces noise and maintains sensor accuracy by compensating for gaps and preventing rotation issues, enhancing the overall performance of the steer-by-wire steering system.
Implementation Method 1
an elastic member located between the first supporter and the second supporter
Implementation Method 2
a sensor that is coupled to the sensor holder and detects a position of the magnet
Data Source
AI summary
According to a steer-by-wire steering apparatus of the present embodiments, by means of offsetting a gap due to abrasion occurring in a rotation preventing member for preventing the rotation of a sliding bar as the sliding bar connected to wheels slide, noise is reduced, precision of a sensor for sensing the position of the sliding bar is enhanced, and sensor precision degradation due to moving or bending of the sliding bar can be prevented.