Vehicle MRM Steering Control for Rear-Collision Avoidance
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Solution Overview
Problem
When an automatic lane keeping system decelerates and stops, there is a risk of contact or collision with a rear vehicle due to delayed detection or braking by the rear vehicle.
Innovation Solution
A driving control apparatus that includes an environmental condition estimating part for recognizing surrounding vehicles and environments, a path generating part for generating a target path, and a vehicle control part for performing speed and steering control, which activates risk minimization control by determining the direction of corrective steering based on the lateral position of the rear vehicle during deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle performs deceleration and stop in the lane when MRM function is activated, then the automated in-lane driving safety is improved, but the risk of contact and collision by a vehicle in the rear increases
Solution Approach 1:
The system performs preliminary detection of rear vehicles and pre-calculates corrective steering directions before deceleration begins. When MRM is activated, the control apparatus already has the rear vehicle's lateral position information and has determined the appropriate corrective steering direction in advance, allowing proactive risk mitigation during the deceleration process
Solution Approach 2:
The system continuously monitors the lateral position of rear vehicles during deceleration and dynamically adjusts the corrective steering direction. The environmental condition estimating part provides real-time feedback on rear vehicle positions, allowing the vehicle control part to modify the avoidance path as conditions change, ensuring ongoing safety during the MRM execution
2Reliability
If corrective steering is performed during deceleration based on rear vehicle lateral position, then the risk of contact and collision is reduced, but the steering control complexity increases
Solution Approach 1:
The corrective steering is applied locally and selectively based on the specific lateral position of the rear vehicle. Rather than implementing a complex global replanning algorithm, the system applies targeted steering corrections in the immediate vicinity of the detected risk, adjusting only the necessary portion of the path to avoid the rear vehicle while maintaining the overall MRM objective
Solution Approach 2:
The system changes steering parameters (steering angle, steering rate) based on the rear vehicle's lateral position parameters. By directly mapping the detected lateral position to appropriate steering corrections, the system avoids complex optimization calculations while achieving effective collision avoidance through parameter adjustment
Data Source
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AI summary
[Problem to be Solved] To reduce a risk of contact and collision by a vehicle in the rear by taking the position of the vehicle in the rear into consideration when risk minimization control is activated. [Solution] In a driving control apparatus for a vehicle that has a function for performing automated in-lane driving by maintaining a set vehicle speed when there is no preceding vehicle in a vehicle's driving lane, and maintaining a set inter-vehicle distance when there is a preceding vehicle, and an MRM function for performing risk minimization control including decelerating and stopping the vehicle in the lane when a system failure occurs during operation of the automated in-lane driving function or when operation is not taken over by a driver when a system failure occurs, when the MRM function is activated, a direction of corrective steering is determined on the basis of a lateral position of a vehicle in the rear in the vehicle's driving lane and the corrective steering is performed during deceleration.