Collision Avoidance Steering Control Under Vehicle and Road Constraints
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Solution Overview
Problem
Existing vehicle collision avoidance assistance devices often default to collision avoidance braking regardless of the situation, which may not always be the most appropriate response, as the decision to use braking or steering to avoid a collision is not adequately tailored to the vehicle's condition and surroundings.
Innovation Solution
A processor-configured vehicle collision avoidance assistance device that assesses the vehicle's condition and surroundings to determine whether to perform forced braking or forced steering, considering factors like braking device deterioration, vehicle weight, road gradient, and road surface conditions, to select the most appropriate collision avoidance method based on specific circumstances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision avoidance braking is performed regardless of the situation, then the vehicle can stop before colliding with an object, but the collision avoidance process may not be appropriate depending on the situation around the vehicle
Solution Approach 1:
The system dynamically switches between collision avoidance braking and collision avoidance steering based on real-time evaluation of request conditions and forbiddance conditions. The processor determines whether to perform forced braking or forced steering by continuously monitoring vehicle state and environmental factors, making the collision avoidance process adaptive to different situations rather than static
Solution Approach 2:
The system changes the operational parameters of the collision avoidance process by evaluating multiple conditions (request conditions and forbiddance conditions) and selecting different avoidance methods accordingly. When forbiddance conditions are met, the system switches from potential steering to braking, and when request conditions are not met, it defaults to braking regardless of forbiddance conditions
2Reliability
If collision avoidance steering is used to avoid collision, then the vehicle can pass by the side of the object, but the vehicle may veer into an opposing lane or exhibit unstable behavior
Solution Approach 1:
The system performs preliminary evaluation of forbiddance conditions before executing collision avoidance steering. By checking factors such as vehicle stability control status, road gradient, and opposing lane conditions in advance, the system prevents steering maneuvers that would lead to unstable behavior or veering into opposing lanes, and switches to braking instead
3Adaptability or versatility
If the system evaluates multiple conditions to determine the appropriate collision avoidance process, then the collision avoidance process becomes more appropriate for the situation, but the system complexity increases
Solution Approach 1:
The system segments the collision avoidance decision-making process into distinct request conditions and forbiddance conditions. Each condition evaluates specific aspects (vehicle state, environmental factors, avoidance method suitability), allowing the complex decision process to be broken down into manageable, independently evaluable components that the processor can systematically assess
Data Source
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Figure 3A~3B
AI summary
A vehicle collision avoidance assistance device (10) is configured to perform forced braking or forced steering when a driver's vehicle (100) has a possibility of colliding with an object (200) ahead of the driver's vehicle (100), acquire at least one of information related to a condition of the driver's vehicle (100) and information related to a situation around the driver's vehicle (100), determine, based on the acquired information, whether a request condition for requesting execution of the forced steering is satisfied and whether a forbiddance condition for forbidding the execution of the forced steering is satisfied, perform the forced braking when the request condition is not satisfied regardless of whether the forbiddance condition is satisfied, perform the forced steering when the forbiddance condition is not satisfied and the request condition is satisfied, and perform the forced braking when the forbiddance condition is satisfied though the request condition is satisfied.