Vehicle Braking Control Using Collision Range Overlap
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Solution Overview
Problem
Existing braking systems may inadvertently increase the probability of collision when a collision is predicted, particularly when the braking operation targets specific areas of the vehicle like the trunk, and there is a need to improve collision prediction accuracy.
Innovation Solution
A braking control apparatus that calculates a collision range including a collision point, determining whether to perform a braking operation based on the positional relationship between this range and a predetermined braking-unrequired range in the vehicle, thereby reducing the probability of collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a braking operation is performed to decelerate the own vehicle when a collision is predicted, then the probability of collision is reduced, but the braking operation may inadvertently increase the probability of collision when the collision range overlaps with a braking-unrequired range
Solution Approach 1:
The patent divides the vehicle into different functional zones: a braking-required range and a braking-unrequired range. The control unit selectively applies braking force based on the collision range's positional relationship with these zones. When the collision range overlaps with the braking-unrequired range, braking is suppressed to avoid harmful effects, while braking remains active when the collision range falls within the braking-required range.
Solution Approach 2:
The patent dynamically adjusts the braking control parameter (braking force application) based on the calculated collision range and its overlap with the braking-unrequired range. The control unit modifies the braking operation intensity or suppression level according to the degree of overlap between the collision range and the braking-unrequired range, optimizing collision avoidance while preventing harmful braking effects.
2Object-affected harmful factors
If the braking control system suppresses braking operations to avoid increasing collision probability in specific scenarios, then harmful effects are reduced, but the overall collision prediction accuracy and response effectiveness may be compromised
Solution Approach 1:
The patent performs preliminary calculation of the collision range and its positional relationship with the braking-unrequired range before executing the braking operation. The control unit predicts the collision outcome in advance by analyzing whether the collision range overlaps with the braking-unrequired range, and only suppresses braking when the prediction indicates harmful effects will occur. This preliminary analysis ensures accurate collision prediction while avoiding unnecessary braking suppression.
3Measurement precision
If the braking control apparatus calculates a collision range including collision point to determine braking operation, then collision prediction accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent segments the collision assessment into distinct computational steps: first calculating the collision range based on relative position and movement vectors, then determining the overlap between the collision range and the braking-unrequired range, and finally controlling the braking operation based on this overlap analysis. This segmentation simplifies the control logic while maintaining high collision prediction accuracy.
Data Source
AI summary
A braking control apparatus for controlling a braking operation for an own vehicle is configured to: acquire information on an object detected around the own vehicle; calculate, when a collision between the own vehicle and the object is predicted based on both an estimated route of the object estimated based on the acquired information on the object and an estimated route of the own vehicle, a collision range in the own vehicle at a collision timing between the own vehicle and the object or a collision range in the object at the collision timing; and control, according to a positional relationship between a predetermined braking-unrequired range in the own vehicle and the calculated collision range in the own vehicle or a positional relationship between a predetermined braking-unrequired range in the object and the calculated collision range in the object, whether to perform the braking operation for the own vehicle.