Adaptive Driver Assistance Trajectory Control
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Solution Overview
Problem
Existing driver assistance systems often guide vehicles to the center of the lane, which may not align with individual driver preferences, leading to uncomfortable and unnatural driving experiences, especially when encountering adjacent vehicles or obstacles.
Innovation Solution
The system allows for driver-specific adaptation by offering two modes: dynamic and defensive driving styles, where the vehicle's trajectory is adjusted based on the selected mode, guiding the vehicle to the outer side of the lane during curves in dynamic mode and to the center in defensive mode, while also modifying the trajectory to safely pass obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver assistance system guides the vehicle to the center of the lane, then the lane keeping function is improved, but the driver comfort and acceptance deteriorate when adjacent vehicles are present
Solution Approach 1:
The patent applies dynamics by making the reference trajectory adaptive rather than fixed. The system dynamically adjusts the reference trajectory based on detected traffic situations, specifically shifting it laterally when adjacent vehicles are detected. This allows the lane keeping function to maintain reliability while adapting to contextual factors that affect driver comfort, resolving the contradiction between strict center-lane guidance and driver acceptance.
Solution Approach 2:
The patent changes the parameter of the reference trajectory position based on detected traffic conditions. When vehicles are detected in adjacent lanes, the system modifies the lateral position parameter of the reference trajectory, shifting it away from the lane center toward the opposite side. This parameter adaptation allows the system to maintain lane keeping functionality while accommodating driver preferences in specific traffic contexts.
2Reliability
If the lane holding function is activated to return the vehicle to lane center, then the travel safety is improved, but the driver has to exert greater force on the steering wheel during intentional lane changes
Solution Approach 1:
The patent implements feedback by continuously monitoring the driver's steering input and the position of the vehicle relative to the adaptive reference trajectory. When the system detects that the driver is initiating an intentional lane change (through steering wheel torque or direction), it provides feedback by adjusting the reference trajectory to accommodate the intended maneuver, thereby reducing the counteracting steering forces and making the operation easier while maintaining safety through continuous trajectory optimization.
3Device complexity
If the vehicle follows a fixed trajectory to the lane center, then the control simplicity is maintained, but the adaptability to individual driver preferences and traffic situations deteriorates
Solution Approach 1:
The patent applies self-service by enabling the system to automatically adapt the reference trajectory based on detected traffic situations without requiring manual driver input or complex configuration. The system autonomously determines when to shift the reference trajectory laterally by detecting adjacent vehicles and automatically adjusts the trajectory parameters accordingly, providing adaptability to traffic contexts while maintaining control simplicity through automated decision-making.
Data Source
AI summary
A method for controlling a driver assistance system having sensors for recording the vehicle's environment and a device for intervening in onboard systems of the vehicle as a function of output signals of the sensors, the driver assistance system recording at least the course of a travel lane along which the vehicle is traveling and the position of the vehicle with respect to the travel lane, and guiding the vehicle on a trajectory; in this context, the driver assistance system establishes the trajectory as a function of the driver request.