Route Generation Device Continuous Curvature
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Solution Overview
Problem
Route generating devices often fail to produce routes that ensure good riding comfort for vehicles, particularly in autonomous driving systems, as they do not effectively manage curvature changes along the route.
Innovation Solution
A route generating device that generates routes by connecting an initial location and a destination through a curve with continuously changing curvature, utilizing a target route generating section that determines and outputs route information for steering, suspension, and vehicle speed control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a route is generated by connecting initial location and destination through a line including a curve, then the route provides directional guidance for vehicle movement, but the curvature changes abruptly causing poor riding comfort
Solution Approach 1:
The patent applies dynamics by making the curvature of the route continuous rather than abrupt. The target route generating section generates curves where curvature changes continuously along the route, transforming the static route geometry into a dynamic profile that adapts to vehicle motion characteristics, thereby improving riding comfort while maintaining guidance functionality
Solution Approach 2:
The patent changes the curvature parameter along the route to ensure continuous variation. By controlling the curvature parameter to change continuously rather than abruptly, the system resolves the contradiction between providing clear route guidance and ensuring comfortable vehicle movement, as the continuous curvature parameter allows smooth vehicle trajectory adjustment
2Productivity
If the route includes sharp curves to reach destination efficiently, then the route length is reduced, but the vehicle experiences abrupt steering changes reducing riding comfort
Solution Approach 1:
The system uses dynamic curvature adjustment along the route, where the curvature changes continuously rather than remaining constant or changing abruptly. This dynamic approach allows the route to maintain efficiency while ensuring smooth steering transitions that preserve vehicle stability and riding comfort
Solution Approach 2:
The patent explicitly uses curvature-based route generation where the target route includes curves with continuously changing curvature. This curvature principle transforms sharp angular turns into smooth curved paths, maintaining route efficiency while eliminating abrupt steering changes that would compromise vehicle stability
3Device complexity
If the route uses straight lines between waypoints for simplicity, then the route generation is computationally simple, but the vehicle cannot maintain stable motion through curves
Solution Approach 1:
The patent applies curvature-based route generation where the target route is defined by continuous curvature variations. This approach maintains relative computational simplicity while fundamentally improving vehicle motion stability through curves, as the continuous curvature provides predictable and smooth steering requirements compared to abrupt directional changes
Data Source
AI summary
A route generating device configured to generate a route includes a target route generating section (611) configured to generate a target route by connecting an initial location and a destination location through a line including a curve, a curvature of the curve generated by the target route generating section (611) is continuous along the curve.