Steering Control Device White Line Approach Suppression
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Solution Overview
Problem
Conventional steering control systems cause discomfort to drivers when the detection of one white line fails, leading to unexpected steering reactions due to uncontrolled increases in steering reaction force, as the system relies on the relationship between detected white lines for control amounts.
Innovation Solution
A steering control device that calculates a white line approach suppression steering reaction force, increasing as the vehicle approaches a white line, and limits this force when the other white line becomes undetectable, ensuring the steering reaction force aligns with driver expectations by capping the increase gradient, thus preventing unexpected steering reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the white line approach suppression steering reaction force is increased as the vehicle approaches the white line to prevent lane departure, then the lane keeping effectiveness is improved, but when the other white line becomes undetectable, the steering reaction force increases unexpectedly causing driver discomfort
Solution Approach 1:
The patent dynamically adjusts the increase gradient of the white line approach suppression steering reaction force based on detection conditions. When both white lines are detected, the system uses a first increase gradient; when one white line becomes undetectable, it switches to a second increase gradient that is smaller than the first, preventing unexpected sharp increases in steering reaction force while maintaining lane keeping effectiveness
Solution Approach 2:
The system changes the parameter (increase gradient of steering reaction force) based on the detection status of white lines. By switching between different gradient values (first gradient when both lines detected, second gradient when one line undetectable), the system adapts the steering reaction force characteristics to current detection conditions, resolving the contradiction between maintaining control effectiveness and ensuring driver comfort
Data Source
AI summary
A steering control device is provided that calculates a white line approach suppression steering reaction force that is based on a distance in which a host vehicle is separated from either a left or a right white line when the host vehicle approaches the left or a right white line. The steering control device applies a steering reaction force to a steering unit that receives steering input from a driver, based on the white line approach suppression steering reaction force, and upon determining that the other among the left and right white lines cannot be detected and a distance between the host vehicle and the left or right white line is decreasing, the white line approach suppression steering reaction force is limited.