Transverse Guidance Control Tuned to Driver Engagement
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Solution Overview
Problem
The safety and availability of SAE level 2 driver assistance systems, particularly steering and lane guidance assistants, are compromised during automated following travel when drivers fail to adequately monitor the vehicle, leading to potential lateral collisions due to inadequate intervention in lane changes by preceding vehicles.
Innovation Solution
A control unit for semi-automated transverse guidance of vehicles adjusts the dynamics of the transverse guidance actuator based on driver engagement, reducing intervention when the driver is less engaged and increasing it when the driver is more engaged, using sensor data to assess the need for steering torque and angle adjustments to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the transverse guidance actuator operates with high automation intervention, then the lane guidance function is more available, but the safety risk increases when the driver is not monitoring the vehicle
Solution Approach 1:
The control unit dynamically adjusts the intervention level of the transverse guidance actuator based on real-time driver monitoring status. When the driver is actively monitoring, the system operates with higher automation intervention for improved lane guidance availability. When the driver is not monitoring, the system reduces automation intervention to enhance safety by allowing greater driver override capability.
Solution Approach 2:
The system continuously monitors driver status through camera detection of eye direction and provides feedback to adjust the actuator's intervention level. This closed-loop feedback mechanism enables the system to adapt the automation level based on whether the driver is paying attention, thereby resolving the contradiction between automation availability and safety risk.
2Extent of automation
If the transverse guidance actuator intervenes frequently to maintain lane position, then the lane guidance availability is improved, but the driver situation awareness deteriorates
Solution Approach 1:
The control unit dynamically adapts the intervention frequency and intensity based on detected driver engagement level. When the driver is actively monitoring the driving situation, the system increases automation intervention to maintain precise lane positioning. When the driver is not monitoring, the system reduces intervention frequency to allow the driver to regain situation awareness, thus balancing lane guidance availability with driver awareness.
3Extent of automation
If the system operates at SAE level 2 automation, then the transverse guidance function is more available, but the requirement for permanent driver monitoring increases safety risks
Solution Approach 1:
The system performs preliminary detection of driver monitoring status through camera-based eye direction detection before executing transverse guidance maneuvers. When the driver is not monitoring, the system proactively reduces automation intervention levels and adjusts actuator behavior to prevent potential lateral collisions, thereby counteracting the safety risks inherent in SAE level 2 operation.
Solution Approach 2:
The system continuously monitors driver attention through eye direction detection and provides real-time feedback to adjust the transverse guidance actuator's intervention level. This feedback mechanism enables the system to maintain SAE level 2 automation availability while dynamically managing safety risks by reducing intervention when the driver is not monitoring, thus preventing lateral collision hazards.
Data Source
AI summary
A control unit is provided for an ego vehicle equipped with a transverse guidance actuator which is designed to transversely guide the ego vehicle in an at least partly automated manner during a follow-on drive. The control unit is designed to detect a transverse guidance maneuver of the ego vehicle required for the follow-on drive. The control unit is additionally designed to ascertain driver information with respect to the driver of the ego vehicle, the driver information including at least one indication of how engaged the driver is with monitoring and/or carrying out the transverse guidance of the ego vehicle. The control unit is further designed to set a dynamic of an intervention, which is automatically carried out by the transverse guidance actuator of the ego vehicle, for the transverse guidance maneuver on the basis of the ascertained driver information.