ADAS Manual Lane Biasing for Smooth Driver Steering Override
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driver assistance systems lack a seamless transition between lane centering and manual vehicle maneuvering, leading to discontinuous and inconsistent driving experiences when the driver desires to bias the vehicle based on surroundings while maintaining lane centering.
Innovation Solution
Implement a manual lane biasing mode in an advanced driver assistance system (ADAS) that allows the driver to steer away from the lane trajectory with reduced resistance, while the system remains active, using a lower torque level than the full lane centering mode, and transitions back based on driver inputs and vehicle positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If full lane centering control mode is activated to keep the vehicle centered on trajectory, then lane centering precision is improved, but driver maneuverability is restricted and driving experience becomes discontinuous
Solution Approach 1:
The system dynamically transitions between full lane centering control mode and manual lane biasing mode based on driver input detection. The control mode is not static but adapts in real-time, allowing the system to switch from high precision centering to enhanced driver maneuverability when the driver applies sufficient steering torque, thus resolving the contradiction between precision and ease of operation
Solution Approach 2:
The system changes the control parameter (torque level applied by ADAS) between two distinct states: first torque level in full lane centering mode for precise trajectory following, and second torque level in manual lane biasing mode for driver maneuverability. This parameter switching enables the system to provide both precision and ease of operation at different times
2Measurement precision
If full lane centering control mode applies high torque level against steering input, then trajectory following accuracy is improved, but system continuity and consistency deteriorate when driver intervention is needed
Solution Approach 1:
The system maintains continuous useful action by ensuring that the ADAS remains active and engaged throughout the transition between full lane centering control mode and manual lane biasing mode. The lane centering system does not disengage completely but continues to provide assistance at a reduced torque level, ensuring uninterrupted and consistent system operation that enhances reliability
Solution Approach 2:
The system dynamically adjusts the torque level based on driver input detection, transitioning smoothly between control modes rather than abruptly disengaging. This dynamic adaptation maintains system continuity by keeping the ADAS engaged in both modes, preventing the discontinuous experience that would occur with complete disengagement and re-engagement cycles
Data Source
AI summary
A method comprises: activating a full lane centering control mode in an advanced driver assistance system (ADAS) of a vehicle, wherein in the full lane centering control mode the ADAS keeps the vehicle centered on a trajectory of a lane regardless of surroundings of the vehicle and applies a first torque level against steering input that a driver applies using a steering wheel; detecting, in the full lane centering control mode, a driver input corresponding to a departure from the trajectory; and in response to the driver input, instead activating a manual lane biasing mode in which the ADAS applies a second torque level against the steering input, the second torque level lower than the first torque level, the manual lane biasing mode allowing the driver to steer away from the trajectory.