Lane Change Control Braking Threshold
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Solution Overview
Problem
Conventional vehicle control systems do not adequately consider the influence of surrounding vehicles when determining whether a lane change can be performed, potentially leading to unsafe conditions.
Innovation Solution
A vehicle control system that includes a recognizer to identify nearby vehicles, a running controller to manage lane changes by controlling the subject vehicle's steering, and a determiner to assess the predicted braking of a reference vehicle, deciding whether to stop the lane change based on a threshold comparison of braking distance and relative distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lane change control is performed based only on subject vehicle parameters, then lane change execution is simple and quick, but safety of surrounding vehicles is not sufficiently considered
Solution Approach 1:
The system performs preliminary determination of the degree of braking that would be generated in the reference vehicle before executing the lane change control. By calculating the braking distance and comparing it with the relative distance in advance, the system identifies potential safety issues before the lane change occurs, allowing preventive action to be taken.
Solution Approach 2:
The system establishes a feedback loop where the determiner continuously monitors the relative relationship between the subject vehicle and reference vehicle, calculates the predicted braking degree, and feeds this information back to the running controller. This feedback mechanism enables the controller to adjust or stop lane change control when safety thresholds are approached.
2Reliability
If the determiner calculates braking distance for every lane change request, then safety assessment is thorough, but processing time and computational load increase
Solution Approach 1:
The system applies a threshold-based approach where the determiner calculates the degree of braking and compares it against a predetermined threshold value. Rather than performing exhaustive analysis in all cases, the system focuses computational resources on evaluating whether the braking degree exceeds the threshold, enabling quick decision-making while maintaining safety assessment accuracy.
Solution Approach 2:
The system changes the parameter of assessment from continuous detailed analysis to threshold-based binary evaluation. By transforming the safety assessment into a comparison between the calculated braking degree and a threshold value, the system reduces computational complexity while maintaining reliable safety determination.
Data Source
AI summary
A vehicle control system includes: a recognizer that recognizes one or more other vehicles present in the vicinity of a subject vehicle; a running controller that performs lane change control of performing lane change of the subject vehicle by controlling at least steering of the subject vehicle; and a determiner that determines whether or not a degree of braking predicted to be generated in a reference vehicle due to the lane change of the subject vehicle is equal to or higher than a threshold on the basis of a relative relationship between the reference vehicle present in a lane that is a destination of the lane change among the one or more other vehicles that have been recognized by the recognizer and the subject vehicle in a case in which the lane change control is performed by the running controller, wherein the running controller stops the lane change control in a case in which it is determined by the determiner that the degree of braking is equal to or higher than the threshold.