Steering Assistance Device Dynamic Torque Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lane maintaining assistance techniques can cause deterioration of the driving experience by applying torque opposite to the driver's steering, and are not always necessary for safe vehicle travel within lane boundaries.
Innovation Solution
A steering assistance device and method that includes a demarcation line detection unit, a horizontal velocity measurement unit, and a steering control unit to assist the vehicle in staying within lane boundaries, stopping assistance when the vehicle is parallel to the lane and the angle with the lane center is within a prescribed limit, and continuing assistance at higher velocities to prevent lane deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lane maintaining assistance technique is continuously applied to correct vehicle direction, then vehicle safety is improved, but driving feeling deteriorates due to opposing torque on steering
Solution Approach 1:
The system dynamically adjusts the assistance state based on real-time detection of vehicle position relative to lane boundaries and horizontal velocity. Assistance is actively applied when the vehicle approaches or exceeds lane boundaries with significant horizontal velocity, and stopped when the vehicle is within boundaries with low velocity, creating a dynamic response that balances safety and driver comfort
Solution Approach 2:
The control system changes the parameter of assistance torque from active to zero based on detected conditions. When the vehicle center is within the lane boundaries and horizontal velocity is below the threshold, the assistance torque parameter is changed to zero, eliminating the opposing force and improving driving feeling while maintaining safety
2Ease of operation
If steering assistance is stopped when vehicle is parallel to lane center, then driving feeling improves, but lane deviation may occur at higher velocities
Solution Approach 1:
The system uses dynamic threshold-based control where the assistance stop condition depends on both position (vehicle center within lane boundaries) and velocity (horizontal velocity below threshold). This dynamic approach allows stopping assistance when safe (improving driving feeling) while preventing lane deviation at higher velocities by maintaining assistance when needed
Solution Approach 2:
The system continuously monitors vehicle position relative to lane boundaries and horizontal velocity, using this feedback to determine when to stop or maintain assistance. The feedback loop ensures assistance is stopped only when both position and velocity conditions indicate safety, preventing lane deviation while improving driving feeling
Data Source
AI summary
Provided is a steering assistance device 1, wherein and a demarcation line detection unit 100 detects left and right lane demarcation lines for a lane in which a vehicle is travelingtravels. An assistance unit 11 performs steering assistance for of the vehicle so that the vehicle travels parallel to the left and right lane demarcation lines. If the vehicle is between the left and right lane demarcation lines and the angle formed by the a direction of travel of the vehicle and a line along the center between the left and right lane demarcation lines is equal to or less than a prescribed angle, a steering control unit 102 stops the steering assistance for of the vehicle by the assistance unit 11.