Vehicle Collision Avoidance Steering Control for Diagonal Obstacles
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Solution Overview
Problem
Current vehicle collision avoidance assist systems face challenges in effectively handling continuous obstacles and reducing processing loads for determining avoidance routes, particularly when obstacles are inclined or moving, which can lead to increased risk of secondary accidents.
Innovation Solution
The system incorporates a forward obstacle detecting device and a controller that executes automatic braking and avoidance control, with unique steering directions determined based on the type of obstacle, such as continuous or moving obstacles, to reduce processing loads and prevent collisions within the driving lane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system executes avoidance control for all detected obstacles, then collision avoidance capability is improved, but processing load increases and secondary accidents may occur
Solution Approach 1:
The patent segments obstacles into different types (continuous obstacles extending diagonally forward versus other obstacles) and applies different avoidance control strategies to each segment. For continuous obstacles, the system determines a unique steering direction along the obstacle. For other obstacles, the system executes avoidance control only when necessary. This segmentation reduces overall processing load while maintaining collision avoidance capability.
Solution Approach 2:
The patent applies partial action by executing avoidance control selectively rather than for all detected obstacles. The system determines whether avoidance control is necessary based on obstacle type and position, applying control only in cases where it is needed (non-continuous obstacles that pose collision risk) and using unique steering direction determination for continuous obstacles instead of full avoidance control.
2Device complexity
If the system determines unique steering directions for continuous obstacles, then processing load is reduced, but collision avoidance effectiveness may be compromised for non-continuous obstacles
Solution Approach 1:
The patent applies local quality by using different avoidance control approaches for different obstacle types. For continuous obstacles, the system uses unique steering direction determination (simpler processing). For non-continuous obstacles, the system uses comprehensive avoidance control (more processing but higher effectiveness). This localized approach ensures each obstacle type receives the appropriate level of processing attention.
Solution Approach 2:
The patent segments the obstacle handling process into two distinct pathways: one for continuous obstacles (diagonally extending) that uses unique steering direction determination, and another for all other obstacles that uses comprehensive avoidance control. This segmentation allows the system to reduce processing load for the common case of continuous obstacles while maintaining full effectiveness for other obstacle types.
Data Source
AI summary
A vehicle collision avoidance assist system, including: a forward obstacle detecting device; and a controller including an automatic braking control executing portion to execute an automatic braking control for permitting a brake apparatus to automatically operate and an avoidance control executing portion to execute, in addition to the automatic braking control, an avoidance control for pen fitting a steering apparatus to automatically operate, wherein the avoidance control executing portion is configured such that, when the forward obstacle detecting device detects, as a forward obstacle, a continuous obstacle that continuously extends diagonally forward so as to be inclined with respect to a forwardly extending centerline that forwardly extends from a center of the own vehicle, the avoidance control executing portion executes the avoidance control to enable the own vehicle to avoid the continuous obstacle such that the own vehicle travels along the continuous obstacle.