Lane-Keeping Trigger Logic Using Predicted Evasive Trajectories
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Solution Overview
Problem
Existing lane keeping aid systems rely on complex lookup tables and unitless scaling factors, making calibration difficult and reducing driving safety due to inconsistent triggering logic.
Innovation Solution
A method that determines a vehicle's traveling trajectory and uses measurable parameters to trigger lane/road keeping maneuvers, eliminating the need for lookup tables and improving calibration predictability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large lookup tables are used to cover sufficient triggering events, then driving safety is improved, but memory requirements increase and device complexity increases
Solution Approach 1:
The patent extracts the essential triggering logic from complex lookup tables and scaling factors, keeping only the core measurable parameters (lateral distance, lateral velocity, lateral acceleration) that directly determine lane keeping aid activation. This eliminates the need for large lookup tables while preserving safety-critical functionality.
Solution Approach 2:
The patent changes the parameter representation from unitless scaled values requiring lookup tables to physical measurements with units (meters, meters per second, meters per second squared). This parameter transformation enables direct comparison with threshold values, eliminating the need for large lookup tables while maintaining accurate triggering decisions.
2Adaptability or versatility
If many calibration parameters are used in lookup tables and scaling factors, then triggering coverage is improved, but calibration difficulty increases and consistency deteriorates
Solution Approach 1:
The patent removes the complex calibration layer of scaling factors and lookup tables, retaining only the essential measurable parameters. This extraction reduces calibration complexity while maintaining the system's ability to adapt to different driving situations through direct physical measurements.
Solution Approach 2:
By changing from unitless scaled parameters to physical measurements with standard units, the patent eliminates the need for complex calibration procedures. The measurable parameters can be directly obtained from sensors without additional calibration steps, improving consistency across different vehicles and conditions.
3Adaptability or versatility
If unitless parameters are used for triggering decisions, then lookup table flexibility is improved, but predictability deteriorates and calibration difficulty increases
Solution Approach 1:
The patent transforms unitless parameters into physical measurements with standard units (meters for lateral distance, meters per second for lateral velocity, meters per second squared for lateral acceleration). This transformation improves predictability by providing intuitive, physically meaningful values that can be directly compared to threshold limits, while maintaining the flexibility needed for accurate triggering decisions.
Data Source
AI summary
Disclosed is a computer-implemented method for determining a lane/road keeping maneuver of a host vehicle. The computer-implemented method includes determining at least one traveling trajectory of the host vehicle. The method includes detecting a lane boundary of a lane or a road boundary of a road that the host vehicle is traveling. The method includes determining, based on the at least one traveling trajectory and the lane/road boundary, whether at least one triggering condition for performing the lane/road keeping maneuver is met. The method includes performing the lane/road keeping maneuver to maintain the host vehicle within a predefined distance from the lane/road boundary.