Lane Biasing Before Automated Steering Maneuvers
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Solution Overview
Problem
Drivers of partially automated vehicles (SAE 2) face challenges in determining the intended movements of the vehicle when using driving assistance systems, as current human-machine interfaces provide insufficient information, leading to unnecessary takeovers by the driver.
Innovation Solution
A method and system that biases the vehicle within its lane with an offset before performing a predetermined steering maneuver, using a lane position sensor system and controller to generate position data and bias the vehicle in the direction of the intended maneuver, providing clear indication of the vehicle's intended path to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driving assistance system provides minimal information through the instrument cluster, then the system complexity is reduced, but the driver's understanding of the vehicle's intended movements becomes insufficient
Solution Approach 1:
The system performs preliminary action by biasing the vehicle within the lane before executing the steering maneuver. This preliminary positioning communicates the intended direction to the driver in advance, allowing the driver to understand the vehicle's planned movements without requiring complex interface displays. The physical act of biasing the vehicle serves as a pre-communication of intent.
Solution Approach 2:
The vehicle's position within the lane acts as an intermediary between the driving assistance system's internal decisions and the driver's understanding. Instead of directly displaying complex navigation data, the system uses the vehicle's physical positioning as a mediator to convey directional intent to the driver through observable lane position changes.
2Reliability
If the driver maintains contact with the steering wheel to monitor the driving assistance system, then the driver's sense of control and ability to intervene is improved, but the duration of automated navigation with hands-off is reduced
Solution Approach 1:
The system implements feedback by continuously providing the driver with observable information about the vehicle's position and intended movements through lane biasing. This feedback loop allows the driver to monitor the system's behavior and maintain confidence in the automated navigation, enabling longer hands-off periods while still feeling connected to and in control of the vehicle.
3Measurement precision
If the vehicle maintains center position in the lane during automatic navigation, then the navigation precision is improved, but the driver's ability to determine intended movements is reduced
Solution Approach 1:
The system applies asymmetry by intentionally deviating from the symmetric center position of the lane. By biasing the vehicle to one side of the lane center before a maneuver, the system creates an asymmetric position that communicates directional intent to the driver. This asymmetric positioning is temporary and controlled, maintaining overall navigation precision while providing informative value.
Data Source
AI summary
A method for automated control of a vehicle includes automatically navigating a vehicle within a current lane of travel with a driving assistance system, and predetermining a steering maneuver during the automatic navigation with the driving assistance system. The method also includes, prior to performing the predetermined steering maneuver, biasing the vehicle within the current lane of travel with an offset from a center of the current lane of travel using the driving assistance system, the offset in a direction of the predetermined steering maneuver, and performing the predetermined steering maneuver with the driving assistance system.