Vehicle Lane Keeping Responsivity Adjustment for Straight Road Stability
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Solution Overview
Problem
Lane keeping control systems in vehicles can become unstable due to changes in how lane markings appear through a camera, especially on straight roads, leading to unnecessary steering corrections and vehicle instability.
Innovation Solution
A vehicle control device with a lane recognizing unit, steering control unit, road condition determining unit, and lane keeping responsivity setting unit that adjusts responsivity based on whether the road is straight, using camera images and map data to determine the stability of lane markings and set appropriate steering responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lane keeping control is performed with high responsivity to keep the vehicle at the center of the lane, then the vehicle positioning accuracy is improved, but the vehicle behavior becomes unstable on straight roads due to false detection of lane marking changes
Solution Approach 1:
The patent applies dynamics by making the lane keeping control responsivity adjustable rather than fixed. The control system dynamically changes its responsivity level based on road condition detection: using low responsivity on straight roads to prevent instability, and high responsivity on curved roads to maintain positioning accuracy. This dynamic adaptation resolves the contradiction between positioning precision and behavioral stability.
Solution Approach 2:
The patent changes the control parameter (responsivity) based on detected road conditions. By detecting whether the vehicle is on a straight road or a curved road, the system adjusts the lane keeping control responsivity parameter accordingly. This parameter change allows the system to maintain high positioning accuracy when needed while ensuring stability when false detections occur.
2Adaptability or versatility
If the lane keeping control responsivity is increased to respond to lane marking changes, then the vehicle can adapt to road geometry changes, but unnecessary steering corrections occur on straight roads making vehicle behavior unstable
Solution Approach 1:
The system dynamically adjusts control responsivity based on road condition detection. On straight roads, low responsivity prevents unnecessary steering corrections and maintains stability. On curved roads, high responsivity enables the vehicle to adapt to road geometry changes. This dynamic adjustment resolves the contradiction between adaptability and stability.
Solution Approach 2:
The patent uses feedback from road condition detection to adjust control parameters. The detection unit provides feedback about whether the vehicle is on a straight road or curved road, and this feedback is used to adjust the lane keeping control responsivity accordingly. This feedback mechanism ensures the system adapts to road geometry while maintaining stability on straight roads.
Data Source
AI summary
A steering control unit performs lane keeping control to cause a steering system to operate to reduce a distance between a width-direction center position of a lane and a position where the vehicle is traveling in the lane on the basis of a recognized state of the lane obtained by a lane recognizing unit. A road condition determining unit determines whether the road on which the vehicle is traveling is a straight road. A lane keeping responsivity setting unit sets, when it is determined by the road condition determining unit that the road on which the vehicle is traveling is a straight road, responsivity of the lane keeping control to the distance to be lower than responsivity set when it is determined that the road on which the vehicle is traveling is not a straight road.