Vehicle Path Switching Control Beyond Map Coverage
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Solution Overview
Problem
Existing vehicle travel assistance systems face irregular behavior when switching from a traveling path based on map information to another path, particularly when entering areas not covered by map data, leading to potential instability and loss of control.
Innovation Solution
A travel assistance method and device that generate both primary and secondary traveling paths, with the system determining when to switch from the primary path to the secondary path based on detection of path termination or low reliability, using a combination of high-definition map information and real-time vehicle sensor data to ensure smooth transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vehicle switches to a traveling path based on trajectory of a preceding vehicle when map information is unavailable, then the vehicle can continue traveling in areas not covered by map information, but the vehicle may cause irregular behavior depending on the condition of the traveling path to follow
Solution Approach 1:
The system performs preliminary actions by detecting the end of the first traveling path in advance before the vehicle actually reaches that point. The control device is configured to detect when the map information coverage will be lost and proactively prepare for switching to the second traveling path based on preceding vehicle trajectory, ensuring a smooth transition before the map data becomes unreliable.
Solution Approach 2:
The system introduces an intermediary mechanism by using the trajectory of a preceding vehicle as a mediating reference for generating the second traveling path. This intermediary approach allows the host vehicle to follow a path that has been validated by another vehicle's successful traversal, reducing irregular behavior while maintaining adaptability to areas without map information.
2Reliability
If the vehicle relies solely on map information for traveling path generation, then the traveling path is stable and reliable within covered areas, but the vehicle cannot operate in areas not covered by map information
Solution Approach 1:
The system dynamically adjusts the traveling path generation method based on the availability and reliability of map information. When map information is available and reliable, the system uses the first traveling path based on map data. When map information becomes unavailable or unreliable, the system dynamically switches to the second traveling path based on preceding vehicle trajectory, ensuring continuous operational adaptability while maintaining stability through conditional path selection.
Data Source
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AI summary
A travel assistance method generates a first traveling path based on map information around a circumference of a host vehicle (S1), generates a second traveling path based on the surroundings (S2), determines that a switch from the first traveling path to the second traveling path is needed when detecting that the first traveling path being generated is to end ahead of the host vehicle while the host vehicle is traveling on the first traveling path (S3), and controls the host vehicle to make a transition from the first traveling path to the second traveling path when the switch is determined to be needed (S4 to S6).