Lane-Keeping System Driver Intention Handling
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Solution Overview
Problem
Existing lane-keeping assistance systems struggle to recognize the separation of primary lanes into secondary lanes, especially in situations with unclear or missing lane markings, leading to incorrect target trajectory calculations and potential override of driver intention, resulting in system discontinuation or undesirable steering torque.
Innovation Solution
A method that detects at least two lane markings, calculates the instantaneous lane width, and analyzes a signal representing the driver's intention to select a target trajectory, allowing the vehicle to follow the driver's intended path by activating the steering device, even in implausible situations, using a sensor system and processing unit to recognize lane separation and detect driver input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the lane-keeping assistance system automatically selects a target trajectory based on detected lane markings, then the system can provide steering guidance, but the system may override driver intention and cause undesirable steering torque or discontinuation in implausible situations
Solution Approach 1:
The system continuously monitors driver steering inputs and compares them with the automatically selected target trajectory. When the driver's steering actions deviate from the system's intended path, the system detects this as driver intention and adjusts or discontinues its intervention, preventing override of the driver's desired maneuver.
Solution Approach 2:
The system dynamically adapts its level of automation based on real-time conditions. In normal situations, it provides active steering guidance along the selected trajectory, but when driver intention is detected or implausible situations arise, it transitions to a less intrusive mode, allowing the driver to take control.
2Reliability
If the system discontinues operation in implausible situations to avoid incorrect guidance, then driver safety is protected, but system availability decreases and the method cannot handle challenging driving conditions
Solution Approach 1:
The system changes its operational parameters based on situation plausibility. In implausible situations with clear lane markings, it maintains guidance functionality by adjusting its confidence thresholds and continuing to provide steering assistance, rather than completely discontinuing operation.
Solution Approach 2:
The system introduces an intermediary evaluation layer that assesses situation plausibility and driver intention between the sensor input and steering output. This intermediary allows the system to maintain operation in challenging conditions while still protecting against incorrect guidance by modulating its intervention level.
3Measurement precision
If the system requires clear lane markings for accurate target trajectory calculation, then guidance precision is improved, but the system fails to operate in situations with unclear or missing lane markings
Solution Approach 1:
The system performs preliminary actions by detecting and storing lane markings in advance, building a historical record of lane positions and characteristics. This allows it to extrapolate target trajectories in situations where current lane markings are unclear or missing, maintaining operation based on previously detected information.
Solution Approach 2:
The system dynamically adjusts its reliance on lane marking detection based on current visibility and clarity conditions. When lane markings are clear, it uses precise detection for accurate trajectory calculation; when markings are unclear or missing, it transitions to using historical data and extrapolation methods to maintain guidance functionality.
Data Source
AI summary
A method for operating a lane-keeping assistance system of a vehicle includes: detecting at least two lane markings in a traffic space ahead of the vehicle using a sensor system; recognizing the separation of a primary lane into a first secondary lane and a second secondary lane based on the at least two detected lane markings; selecting one of the secondary lanes, including detecting and analyzing a signal representing an instantaneous driver intention; calculating a target trajectory of the selected secondary lane; activating a steering device of the vehicle for guiding the vehicle along the calculated target trajectory of the selected secondary lane.