Driver Assistance Takeover Alerts for Lateral Control Deactivation
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Solution Overview
Problem
Driver assistance systems for partially automated lateral control of vehicles face challenges in safely transitioning from an active to a standby state, particularly when lane markings are missing or poorly visible, leading to unplanned deactivation and potential steering conflicts, which can compromise safety.
Innovation Solution
A method that activates a driver assistance function for partially automated lateral control, checks if the driver's hands are on the steering wheel, determines future driving route data, and outputs a takeover request if the driver is not engaged and the situation is critical, using environmental sensors and digital maps to assess potential deactivation points and provide early warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver assistance system operates continuously with partially automated lateral control, then the availability and continuity of assistance is improved, but the system must switch to standby state when detection is insufficient, causing deactivation and requiring driver takeover
Solution Approach 1:
The system performs preliminary assessment of route course data to identify future critical driving situations before they occur. When such situations are detected and the driver's hands are not on the steering wheel, a takeover request is issued in advance, allowing the driver to prepare for the upcoming deactivation and critical situation without sudden transitions.
2Reliability
If the system deactivates when lane markings are missing or poorly visible, then trajectory planning safety is improved, but the driver must manually take over control, reducing automation benefit
Solution Approach 1:
The system uses route course data to proactively identify upcoming situations where lane markings may be missing or poorly visible. By assessing future driving situations in advance, the system can prepare the driver with early takeover requests, maintaining safety requirements while managing the transition from automated to manual control more smoothly.
3Loss of time
If the system waits until the moment of deactivation to request driver takeover, then the takeover request is timely, but the driver may experience implausible steering movements and brief conflict with steering torque
Solution Approach 1:
The system issues takeover requests in advance when future critical driving situations are identified through route course data assessment, rather than waiting until the moment of deactivation. This early notification allows the driver to prepare mentally and physically, eliminating the brief conflict period where the driver works against the steering torque applied by the driver assistance system.
4Reliability
If the system provides early takeover requests for future critical situations, then driver preparation and safety are improved, but the system complexity and detection requirements increase
Solution Approach 1:
The system leverages route course data, which is already being processed for navigation and trajectory planning purposes, to identify future critical driving situations. By reusing existing data infrastructure and assessment capabilities, the system can provide early takeover requests without proportionally increasing overall system complexity.
Data Source
AI summary
A method for operating a driver assistance system of a vehicle includes activating a driver assistance function of the driver assistance system, in which an at least partially automated lateral control of the vehicle is carried out; checking whether a driver has hands on the steering wheel of the vehicle; determining route course data which describe a future driving situation for the vehicle; estimating whether the future driving situation is a critical driving situation based on the route course data, which will lead to a deactivation of the activated driver assistance function; and issuing a takeover request to the driver for the manual lateral control of the vehicle in the event that the driver does not have hands on the steering wheel and that the future driving situation is a critical driving situation, the takeover request being issued before reaching the future critical driving situation.