Vehicle Control System Deceleration Adjustment for Cut-In Prediction
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Solution Overview
Problem
Conventional vehicle control systems often result in excessive deceleration of a subject vehicle when predicting a surrounding vehicle's potential cut-in, leading to inappropriate speed control.
Innovation Solution
A vehicle control system that includes a recognizer to identify cutting-in vehicles by deriving an index value based on cutting-in probability, with a running controller adjusting deceleration accordingly, considering factors like distance, relative position, and map information to determine the degree of deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vehicle control systems predict a surrounding vehicle will cut in, then the subject vehicle decelerates to prevent collision, but the deceleration is excessive and inappropriate
Solution Approach 1:
The system changes the parameter of deceleration magnitude based on the cutting-in probability index value. When the index value is high (high cutting-in probability), the system applies larger deceleration; when the index value is low (low cutting-in probability), the system applies smaller or no deceleration. This dynamic parameter adjustment resolves the contradiction by making deceleration appropriate rather than excessively uniform.
Solution Approach 2:
The system dynamically adjusts the deceleration control strategy based on real-time evaluation of the cutting-in probability index. The running controller continuously monitors the index value and modifies the deceleration magnitude accordingly, transitioning from static excessive deceleration to dynamic appropriate deceleration based on actual cutting-in risk.
2Reliability
If the subject vehicle decelerates to accommodate a predicted cut-in, then safety is improved, but driving comfort deteriorates due to unnecessary braking
Solution Approach 1:
The system adjusts the deceleration parameter based on the cutting-in probability index value. By setting appropriate thresholds and scaling the deceleration magnitude according to the index value, the system maintains safety through controlled deceleration while minimizing unnecessary braking that would harm driving comfort.
Solution Approach 2:
The system applies partial deceleration rather than full excessive deceleration. When the cutting-in probability is low, the system applies minimal or no deceleration; when the probability is high, it applies appropriate deceleration. This partial action approach avoids the harmful effect of unnecessary full braking while maintaining adequate safety.
Data Source
AI summary
A vehicle control system includes: a recognizer that is configured to recognize one or more surrounding vehicles present in a second lane different from a first lane in which a subject vehicle is present; an identifier that is configured to derive an index value according to a cutting-in probability for a side in front of the subject vehicle for a surrounding vehicle recognized by the recognizer and is configured to identify a surrounding vehicle of which the derived index value is equal to or larger than a threshold as a cutting-in vehicle; and a running controller that is configured to decelerate the subject vehicle in accordance with presence of the cutting-in vehicle identified by the identifier and is configured to determine a degree of change in deceleration of the subject vehicle on the basis of the index value of the cutting-in vehicle that is a target when the subject vehicle is decelerated.