Adaptive Cruise Control Target Selection for Distant Vehicles
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Solution Overview
Problem
Existing adaptive cruise control systems face challenges in accurately determining the relevance of distant vehicles, leading to ambiguous acceleration instructions and passenger discomfort due to imprecise sensor data, which can cause unnecessary braking and driver concern.
Innovation Solution
A method for controlling an adaptive cruise control system that includes detecting a second vehicle, determining a relevance indicator based on its trajectory probability, adjusting a severity index, and using a corrected relevance index to control the ACC system, thereby reducing unnecessary braking and enhancing passenger comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the ACC system targets distant vehicles based on sensor data, then the vehicle can maintain cruise control function, but the determination of acceleration instructions becomes ambiguous due to imprecise sensor data
Solution Approach 1:
The patent introduces an intermediary assessment mechanism that evaluates whether a detected vehicle is a suitable target for ACC regulation. This intermediary step filters out ambiguous cases where sensor precision is insufficient, preventing inappropriate target selection while maintaining cruise control functionality for valid targets.
2Extent of automation
If the ACC system regulates on a distant vehicle, then the cruise control operates automatically, but the driver may wonder or worry about the regulation reason
Solution Approach 1:
The patent implements a feedback mechanism that continuously assesses target vehicle suitability and can adjust or terminate regulation when the target becomes ambiguous or inappropriate. This feedback loop ensures the driver receives appropriate information about ACC decisions, preventing confusion or worry about unwarranted regulation actions.
3Stability of the object's composition
If the distance between vehicles is large and speed difference is small, then the gap remains stable, but this prolongs the ambiguity period for target vehicle selection
Solution Approach 1:
The patent applies preliminary assessment criteria to evaluate potential target vehicles before final selection. By pre-evaluating whether a detected vehicle meets ACC target criteria (considering distance, speed difference, and trajectory), the system avoids prolonged ambiguity periods and makes timely target selection decisions even when gap stability is high.
Data Source
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AI summary
The present invention relates to a method and device for controlling an adaptive cruise control system, referred to as an ACC system, of a first vehicle (10). A second vehicle (11) travelling in front of the first vehicle (10) in the direction of travel of the first vehicle (10) is detected. A relevance indicator associated with the second vehicle (11) is determined. A severity score is determined based on the speed deviation between the first and second vehicles and the distance between the first and second vehicles. The relevance score is corrected based on the severity score, and the ACC system is controlled as a function of the corrected relevance indicator.