Steering Assist Apparatus for Dynamic Lane Deviation Avoidance
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Solution Overview
Problem
Existing steering assist systems interfere with driver operations when avoiding neighboring vehicles, either by unnecessary lane adjustments or inadequate assistance, leading to driver discomfort and ineffective lane deviation prevention.
Innovation Solution
A steering assist apparatus that includes a lane set unit, deviation determination unit, neighboring vehicle detection unit, approach degree calculation unit, and steering control unit to adjust steering force based on the vehicle's deviation tendency and approach degree of neighboring vehicles, reducing interference by dynamically adjusting steering force and gaining settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the target traveling line is dislocated regardless of the lateral position of the vehicle when there is a neighboring vehicle, then the vehicle can avoid the neighboring vehicle, but the driver experiences discomfort due to unnecessary lane adjustments
Solution Approach 1:
The system dynamically changes the parameter of target traveling line position based on the lateral position of the vehicle and the distance to neighboring vehicles. When the vehicle is close to the lane center and sufficiently distant from neighboring vehicles, the target traveling line is set to the lane center. When the vehicle deviates toward neighboring vehicles, the target traveling line is dislocated away from the neighboring vehicle, thereby adapting the lane keeping behavior to current driving conditions and reducing unnecessary corrections.
Solution Approach 2:
The target traveling line position is made dynamic rather than fixed, adjusting in real-time based on the relative positions of the vehicle and neighboring vehicles. This dynamic adjustment allows the system to provide lane keeping assistance only when necessary, avoiding interference with natural driving behavior when the lane is clear.
2Ease of operation
If the steering force is reduced according to the approach degree with respect to the inter-vehicle distance regardless of the lateral position of the preceding vehicle, then the steering assistance is reduced when distance is sufficient, but the driver cannot obtain an expected level of assistance
Solution Approach 1:
The steering force reduction is applied locally and selectively based on the lateral position of the vehicle relative to neighboring vehicles. Instead of uniformly reducing steering force based only on distance, the system reduces steering force only in the lateral direction when the vehicle is positioned such that neighboring vehicles pose a potential conflict, while maintaining full steering assistance in other conditions.
3Ease of operation
If the target traveling line is changed even when the neighboring vehicle travels sufficiently away, then the driver feels unnecessary interference, but if the target traveling line is not changed, the vehicle may not avoid the neighboring vehicle when needed
Solution Approach 1:
The system changes the parameter of target traveling line position based on conditional parameters including the lateral position of the vehicle and the distance to neighboring vehicles. The target traveling line is dislocated from the lane center only when the vehicle is positioned such that neighboring vehicles require avoidance, and is set to the lane center when vehicles are sufficiently distant, thereby providing obstruction avoidance only when necessary.
Data Source
AI summary
A steering assist apparatus of a vehicle includes: a lane set unit to recognize an environment of ahead the vehicle; a deviation determination unit to determine whether the vehicle has a deviation tendency from a traveling lane; a steering control unit to apply steering force in a deviation avoiding direction to the steering mechanism when it is determined that the vehicle has a deviation tendency; a neighboring vehicle detection unit to detect a neighboring vehicle, which travels ahead of the vehicle in a lane next to the traveling lane of the vehicle; and an approach degree calculation unit to calculate an approach degree of the neighboring vehicle toward the vehicle. When the vehicle has a deviation tendency in a direction away from the traveling lane of the neighboring vehicle, the steering control unit reduces the steering force in the deviation avoiding direction according to an increase of the approach degree.