Lane-Keeping Steering Reaction Force Control During Boundary Switching
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Solution Overview
Problem
Existing steering control systems generate unpredictable reaction forces that can cause driver discomfort when switching lane boundaries, leading to unexpected steering wheel feedback.
Innovation Solution
A steering control device with a detection unit, reaction force device, and control unit that adjusts reaction forces based on lane boundaries to prevent vehicle deviation, limiting reaction force output during boundary switches to minimize discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reaction force is varied based on a predetermined reduction amount according to the distance from the boundary line when the host vehicle crosses the boundary line, then the host vehicle can be kept within the lane, but the reaction force may be generated in a direction different from that expected by the driver, causing driver discomfort
Solution Approach 1:
The control unit determines a predetermined time period in advance when the host vehicle crosses the boundary line between lanes. During this predetermined time period, the control unit restricts the reaction force output from the reaction force device, preventing the generation of unexpected reaction forces that would cause driver discomfort while still maintaining lane keeping capability after the transition period
Solution Approach 2:
The control unit dynamically adjusts the reaction force output based on the host vehicle's position relative to lane boundaries. When the host vehicle is in the process of crossing a boundary line, the system transitions from normal reaction force application to restricted reaction force output during a predetermined time period, then returns to normal operation, creating a dynamic adaptation to the lane change scenario
Data Source
AI summary
The steering control device includes a detection unit for detecting the lane in which the own vehicle is traveling, a reaction force device that applies a reaction force to the steering direction of the steering wheel for operating the steering device of the own vehicle, and a control unit that recognizes the position of the own vehicle in the lane based on the detection result of the lane and causes the reaction force device to output a reaction force to suppress the own vehicle from deviating from the lane. The control unit performs first control, based on the detection results, to suppress the host vehicle from deviating from the first boundary, and limits the reaction force output from the reaction force device for a predetermined time at a first timing of switching the lane deviation monitoring target from the first boundary to the second boundary.