Driving Assistance Path Planning for Consecutive Curves
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Solution Overview
Problem
Existing autonomous driving assistance systems generate travel paths that may involve steep turns or sudden decelerations when navigating curved sections with multiple consecutive curves, potentially burdening vehicle occupants.
Innovation Solution
A driving assistance device and computer program that set a coupling point for consecutive curves, generating a travel path by combining first-half and second-half paths, using start and end vectors to minimize steep turns and sudden decelerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a travel path is generated in the center of a lane for curved sections, then the path generation is simple, but the path may involve steep turns or sudden decelerations that burden occupants
Solution Approach 1:
The curved section is divided into multiple sub-curves, and a coupling point is selected to split the curved section into a first half and a second half. This segmentation allows independent path generation for each half, enabling optimization to avoid steep turns and sudden decelerations while maintaining overall path simplicity.
2Ease of operation
If a travel path follows the center of the lane through consecutive curves, then the path is easy to generate, but it may create abrupt direction changes that discomfort occupants
Solution Approach 1:
The path generation process is segmented into two independent stages: generating a first path from the start vector to the coupling point, and generating a second path from the coupling point to the end vector. This allows each path segment to be optimized separately to avoid abrupt direction changes, while the overall process remains computationally efficient.
Data Source
AI summary
Provided is a driving assistance device and a computer program to generate a travel path suppressing a steep turn or sudden deceleration upon traveling on a curved section or consecutive curves, as a travel path recommended for vehicle travel. Specifically, a planned travel route along which a vehicle travels is obtained; particularly, when the obtained planned travel route includes a plurality of consecutive curves, a coupling point for the plurality of curves is set, using map information including information about markings and targeting a curved section including the plurality of curves; a first-half travel path that reaches the coupling point from a start vector and a second-half travel path that reaches an end vector from the coupling point are combined together, targeting the curved section, to generate a recommended travel path for a vehicle; and driving assistance for the vehicle is provided based on the generated travel path.