Vehicle Longitudinal Speed Control for Anticipated Cut-In Maneuvers
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Solution Overview
Problem
Existing automated speed management systems in vehicles often cause discomfort during cut-in maneuvers by failing to anticipate and adjust speed accordingly, leading to potential discomfort and safety issues.
Innovation Solution
A method and device for automated longitudinal speed management that detects a second vehicle's intention to cut in, estimates a corrected longitudinal distance, and computes a speed setpoint for the ego vehicle based on this distance and relative speed, ensuring comfortable and reassuring regulation by adjusting speed to maintain a safe distance and account for surrounding vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the automated speed management system anticipates cut-in maneuvers by detecting visual indicators and computing time to line crossing, then the system can prepare speed regulation in advance, but this may generate discomfort when driving due to premature or inaccurate speed adjustments
Solution Approach 1:
The system performs preliminary detection of cut-in intentions by monitoring visual indicators (flashing lights) and computing time to line crossing before the actual maneuver occurs. This allows the control system to prepare speed adjustments in advance, ensuring smooth and comfortable transitions while maintaining accurate speed regulation. The preliminary detection triggers a sequence of actions including estimating corrected longitudinal distance and computing appropriate speed setpoints before the cut-in vehicle actually enters the lane.
2Measurement precision
If the system computes corrected longitudinal distance based on measured distance and relative speed, then the system can maintain accurate spacing, but this requires complex calculations involving multiple parameters
Solution Approach 1:
The system introduces a corrected longitudinal distance as an intermediary parameter that simplifies the control problem. Instead of directly managing complex multi-parameter calculations in real-time, the system first computes the corrected longitudinal distance that accounts for the cut-in vehicle's trajectory and speed, then uses this single parameter to determine the appropriate speed setpoint. This intermediary approach maintains measurement precision while reducing computational complexity.
3Loss of time
If the system detects cut-in intentions early using visual indicators, then the system can react in advance, but this increases the complexity of detection requirements
Solution Approach 1:
The system utilizes visual indicators (flashing lights) on the cut-in vehicle as a detection mechanism. By monitoring changes in the visual state (flashing patterns) of the target vehicle's indicators, the system can detect cut-in intentions early without requiring complex sensor arrays or sophisticated algorithms. This approach reduces detection complexity while maintaining early reaction capability.
Data Source
AI summary
A method for automated management of the longitudinal speed of a first vehicle travelling on a first lane includes: detecting an intention of a second vehicle travelling on a second lane adjacent to the first lane to perform an insertion maneuver on the first lane; estimating a corrected longitudinal distance, the corrected longitudinal distance corresponding to the longitudinal distance that will separate the first vehicle from the second vehicle at the end of the insertion maneuver, the corrected longitudinal distance being calculated as a function of a measured longitudinal distance between the first vehicle and the second vehicle, and as a function of a relative longitudinal speed measured between the second vehicle and the first vehicle; and calculating a longitudinal speed setpoint of the first vehicle as a function of the corrected longitudinal distance.