Lane Change Controller Adjusting Lateral Acceleration for Adjacent Objects
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Solution Overview
Problem
Existing lane change assist systems do not adequately account for objects present in the target lane or its vicinity, leading to potential alarm for vehicle occupants and inappropriate lane changes.
Innovation Solution
A lane change control system that includes a surrounding environment acquisition section, a lane marking/object detection section, and an object determination section to assess the presence of objects in the target lane or its vicinity, with a lane change controller reducing lateral acceleration or velocity to facilitate safe lane changes, and optionally classifying objects to adjust reduction ratios based on type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lane change control is performed with normal lateral acceleration/velocity when objects are present in the target lane, then lane change speed and efficiency are maintained, but occupants may be alarmed and safety is compromised
Solution Approach 1:
The lane change control system dynamically adjusts lateral acceleration and velocity based on the presence and type of detected objects. When objects are detected in the target lane or vicinity, the controller reduces these parameters to appropriate levels, enabling the system to adapt its performance characteristics to current environmental conditions rather than maintaining fixed control parameters
Solution Approach 2:
The system changes key control parameters (lateral acceleration and velocity) based on object detection results. The object determination section identifies whether objects are present in the target lane, and the lane change controller modifies the lateral acceleration/velocity parameters accordingly, using different reduction ratios for different object types to optimize both safety and efficiency
2Object-affected harmful factors
If lateral acceleration is reduced when objects are detected, then occupant alarm is avoided and safety is improved, but lane change time increases
Solution Approach 1:
The lane change controller applies different reduction ratios for lateral acceleration and velocity based on the specific type of object detected. For example, slower-moving objects like pedestrians or cyclists may trigger different reduction levels compared to faster-moving vehicles, allowing the system to apply the appropriate level of caution locally tailored to each object type rather than using a uniform reduction approach
Solution Approach 2:
The system applies partial reduction of lateral acceleration and velocity only when and where necessary (when objects are detected in the target lane), rather than reducing performance in all conditions. This allows normal lane change speed to be maintained when the path is clear, while applying cautionary reduction only in the specific situation where objects are present
Data Source
AI summary
When an object detected by a lane marking/object detection section has been determined to be an object present in an adjacent lane change target lane or in the vicinity of the adjacent lane, lane change control is performed to reduce a predetermined maximum lateral acceleration Aymax′ or maximum lateral velocity Vymax′ according to the lane width Lob of the adjacent lane.