Lane-Change Control Using Speed and Lateral Position Staging
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Solution Overview
Problem
Existing Advanced Driver Assistance Systems (ADAS) struggle to efficiently and safely perform lane changes in complex traffic scenarios without operator intervention, as they often fail to accurately assess and maintain the required longitudinal distances and lateral positions relative to surrounding vehicles.
Innovation Solution
A vehicle computer system that adjusts the host vehicle's speed and lateral position to establish and maintain specific forward and rear longitudinal distances relative to lead and trailing vehicles in the target lane, allowing for safe lane changes without operator input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle performs lane changes autonomously without operator intervention, then the ease of operation is improved, but the reliability may worsen due to complex decision-making in dynamic traffic scenarios
Solution Approach 1:
The system performs preliminary actions by pre-establishing longitudinal distance thresholds and lateral position criteria before executing lane changes. The vehicle computer assesses traffic conditions, determines safe distances to lead and trailing vehicles, and validates lateral positioning requirements before initiating lane change maneuvers, ensuring reliable autonomous operation.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring longitudinal distances to surrounding vehicles and lateral positions during lane change operations. The vehicle computer adjusts control signals based on real-time sensor data, comparing actual positions and distances against predetermined thresholds to ensure safe and reliable lane changes.
2Reliability
If the vehicle maintains strict longitudinal distance thresholds and lateral position requirements, then the safety is improved, but the productivity decreases due to longer lane change execution time
Solution Approach 1:
The system applies dynamics by adaptively adjusting longitudinal distance thresholds and lateral position requirements based on real-time traffic conditions, vehicle speed, and environmental factors. The vehicle computer dynamically modifies control parameters during lane change execution, allowing flexible adaptation to maintain safety while optimizing lane change duration and efficiency.
Data Source
AI summary
In response to an initiation of a lane-change, a speed of a host vehicle in a current lane can be adjusted to establish a forward longitudinal distance from a lead vehicle in a target lane. The host vehicle is then moved from a first lateral position to a second lateral position in the current lane based on determining that a rear longitudinal distance of the host vehicle from a trailing vehicle in the target lane is less than a rear distance threshold, and then the host vehicle is additionally moved from the second lateral position to a third lateral position in the current lane based on determining that the rear longitudinal distance is increasing. When the forward longitudinal distance exceeds a forward distance threshold and the rear longitudinal distance exceeds the rear distance threshold, the vehicle is moved from the current lane to the target lane.