Vehicle Lane Change Control Adapting to Traffic Flow
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Solution Overview
Problem
Existing vehicle control systems fail to smoothly execute lane changes on freeways with multiple lanes, particularly between car pool lanes and general lanes, due to differences in traffic flow, density, and speed, without considering the specific conditions required for automated driving techniques.
Innovation Solution
A vehicle control device and method that includes a lane recognition unit, a control condition setting unit, and a vehicle control unit to recognize lane types and set appropriate control conditions for lane changes based on traffic flow, allowing for stable and smooth lane changes by adjusting parameters such as velocity differences, inter-vehicle distances, and remaining distances to exits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automated driving control is implemented on freeways with multiple lanes including car pool lanes, then driving automation capability is improved, but lane change smoothness deteriorates due to traffic flow differences between lane types
Solution Approach 1:
The control condition setting unit applies different control conditions tailored to specific lane type combinations. When the host vehicle lane and adjacent lane are both general lanes, one set of control conditions is used. When one or both lanes are car pool lanes, different control conditions are applied. This local differentiation resolves the contradiction by adapting the automated control to local traffic flow characteristics of each lane type, ensuring smooth lane changes while maintaining automation.
2Device complexity
If lane change control is performed without considering lane types, then control simplicity is improved, but lane change appropriateness deteriorates due to ignoring traffic flow differences
Solution Approach 1:
The control condition setting unit dynamically selects control conditions based on the recognized lane types of the host vehicle lane and adjacent lane. The control conditions are not fixed but adapt according to the lane type combination. This dynamic adjustment resolves the contradiction by making the control system flexible enough to handle different traffic flow patterns while maintaining a unified control framework, thus preserving simplicity while improving appropriateness.
3Device complexity
If uniform control conditions are applied for all lane changes, then control system simplicity is improved, but automated driving stability deteriorates on roads with mixed lane types
Solution Approach 1:
The control condition setting unit changes control parameters based on lane type recognition. Different velocity difference thresholds, different inter-vehicle distance requirements, or different lane change timing parameters are applied depending on whether the lanes involved are general lanes or car pool lanes. This parameter adaptation resolves the contradiction by maintaining a simple control system structure while achieving stability through parameter flexibility.
Data Source
AI summary
In a vehicle control device and a vehicle control method, the vehicle control device comprises a lane recognition unit adapted to recognize lane types of a host vehicle lane and an adjacent lane, a control condition setting unit adapted to set first to third control conditions in order to make a lane change depending on the lane types that were recognized by the lane recognition unit, and a vehicle control unit adapted to carry out a lane change control with respect to a host vehicle on the basis of the first to third control conditions set by the control condition setting unit.