Autonomous Lane Change Control Using Early Lateral Speed Variation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle lane change technologies do not effectively allow following vehicles to easily recognize lane changes, leading to potential delays in confirming the change by the driver of the preceding vehicle.
Innovation Solution
The vehicle increases lateral speed within its lane and then decreases it before changing lanes, making it easier for the following vehicle to recognize the lane change by prolonging the confirmation time of the lateral movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lateral speed is decreased during lane change to eliminate discomfort to occupants, then comfort is improved, but the following vehicle may take longer to notice the lane change
Solution Approach 1:
The system performs preliminary acceleration of lateral speed before the lane change to create a more noticeable movement pattern. By increasing lateral speed within the current lane before changing, the preceding vehicle's movement becomes more detectable to following vehicles, allowing them to recognize the lane change intent earlier while still maintaining comfort through controlled deceleration phases
2Reliability
If lateral speed is increased to make lane change more noticeable to following vehicles, then lane change recognition is improved, but occupant comfort may be reduced
Solution Approach 1:
The system employs periodic variation in lateral speed by alternating between acceleration and deceleration phases. The lateral speed is increased within the current lane, then decreased before the lane change, creating a periodic motion pattern that enhances visibility to following vehicles while maintaining acceptable comfort levels through controlled deceleration
3Productivity
If lane change is executed quickly to improve efficiency, then productivity is improved, but the following vehicle may not have sufficient time to confirm the lane change
Solution Approach 1:
The system dynamically adjusts lateral speed during the lane change process rather than maintaining a constant speed. By varying lateral speed according to the phase of lane change (accelerating within current lane, decelerating before change), the system optimizes both the speed of execution and the detectability of the maneuver
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
When executing the autonomous lane change control of lane change of the subject vehicle (V0) from the subject vehicle lane (L1) in which the subject vehicle (V0) travels to adjacent lane (L2), the autonomous lane change control is executed so as to accelerate the lateral speed (Vh) of the subject vehicle (V0) in the subject vehicle lane (LI) and thereafter decelerate the lateral speed in the subject vehicle lane (LI). As a result, it takes longer for the driver of the following vehicle (V2) to confirm the lateral movement of the preceding subject vehicle (V0) during the lane change of the subject vehicle (V0) from the start of the lane change than a lane change in which the lateral speed (Vh) is decelerated in the adjacent lane (L2). Therefore, it becomes easier to recognize the lane change.