Imaginary Vehicle Control for Collision-Aware Lane Joining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle control systems struggle to effectively control acceleration/deceleration based on the traveling state of another vehicle, particularly when the speed of the other vehicle exceeds the speed limit, making it difficult to avoid collisions.
Innovation Solution
A vehicle-traveling control system that acquires positional and speed information on the own vehicle and neighboring vehicles, determines a subject vehicle that may collide, generates an imaginary vehicle traveling at an imaginary speed to a collision assumption position, and controls the distance between the own and imaginary vehicles to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If acceleration/deceleration is controlled toward a decided joining target position, then the own vehicle can join the main lane, but collision avoidance becomes difficult when the subject vehicle speed exceeds the speed limit
Solution Approach 1:
The system performs preliminary actions by continuously generating an imaginary vehicle that reaches the collision assumption position at the same time as the subject vehicle would reach it. This imaginary vehicle is generated from a time point before the own vehicle reaches the collision assumption position, allowing the control system to proactively plan acceleration/deceleration commands that prevent collision while maintaining smooth lane joining operation.
Solution Approach 2:
The patent introduces an imaginary vehicle as an intermediary construct that mediates between the own vehicle and the actual subject vehicle. This imaginary vehicle serves as a control target that incorporates both the subject vehicle's trajectory and speed limitations, allowing the control system to issue acceleration/deceleration commands that simultaneously achieve lane joining and collision avoidance, even when the subject vehicle exceeds speed limits.
2Speed
If the subject vehicle speed exceeds the speed limit, then the subject vehicle may reach the collision assumption position faster, but conventional control cannot appropriately control acceleration/deceleration to avoid collision
Solution Approach 1:
The system dynamically adapts to varying subject vehicle speeds by continuously updating the imaginary vehicle's parameters based on real-time subject vehicle speed information. When the subject vehicle exceeds speed limits or changes speed, the imaginary vehicle's trajectory and arrival time are recalculated, enabling the control system to issue appropriate acceleration/deceleration commands that maintain collision avoidance across all speed conditions.
Solution Approach 2:
The patent changes control parameters by using the imaginary vehicle's speed and position as dynamic control targets rather than fixed parameters. The imaginary vehicle's speed is set based on the subject vehicle's actual speed (even when exceeding limits), and its position is continuously updated to reflect the collision assumption position. This parameter transformation allows the control system to adapt to any subject vehicle speed while maintaining safe operation.
3Reliability
If collision avoidance control is implemented, then safety is improved, but unnecessary acceleration/deceleration may occur
Solution Approach 1:
The system uses feedback by continuously monitoring the subject vehicle's actual speed and position, then updating the imaginary vehicle's parameters accordingly. The control system issues acceleration/deceleration commands based on the difference between the own vehicle's current state and the imaginary vehicle's target state. This feedback mechanism ensures that collision avoidance control is applied only when necessary and at appropriate magnitudes, minimizing unnecessary energy consumption while maintaining safety.
Data Source
AI summary
There is provided a vehicle-traveling control system that can appropriately avoid a collision. A vehicle-traveling control system acquires positional and speed information on an own vehicle, positional and speed information on neighboring vehicles, determines a subject vehicle that travels toward the own vehicle and may collide with the own vehicle, sets a collision assumption position where the own vehicle may collide with the subject vehicle, and continuously generates an imaginary vehicle that reaches the collision assumption position when the subject vehicle reaches there, and issues a command for controlling a distance between the own vehicle and the imaginary vehicle.