Collision Avoidance Steering Control for Secondary Obstacle Risk
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Solution Overview
Problem
Conventional collision avoidance assist systems fail to effectively prevent secondary collisions by not initiating assistance early enough, leading to high vehicle speeds and insufficient deceleration, which can result in collisions with secondary obstacles when the driver is unable to react in time.
Innovation Solution
A collision avoidance assist apparatus that includes obstacle detection, alert systems, avoidance route calculation, automatic brake and turn controls, post-avoidance route calculation, and collision determination to prevent secondary collisions by calculating a post-avoidance route and prohibiting automatic turn control when a secondary obstacle is detected on this route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collision avoidance assist control is started early to ensure sufficient deceleration, then the vehicle can be adequately slowed down, but the driver may feel discomfort due to unnecessary intervention before the driver recognizes the obstacle
Solution Approach 1:
The system performs preliminary actions by calculating the post-avoidance route and detecting secondary obstacles before the vehicle actually reaches them. This allows the system to prepare and prohibit automatic turn control in advance, ensuring sufficient deceleration and safe routing before the driver would need to react, thereby resolving the contradiction between early intervention reliability and driver comfort.
Solution Approach 2:
The system dynamically adjusts its behavior based on real-time conditions. It activates collision avoidance control when primary obstacles are detected, then dynamically evaluates post-avoidance routes for secondary obstacles. This dynamic adaptation allows the system to provide necessary early intervention only when truly needed, balancing reliability with driver comfort by avoiding unnecessary preliminary actions.
2Ease of operation
If the collision avoidance assist control is stopped when the primary obstacle is avoided to entrust driving to the driver, then the driver maintains control, but there is not enough time for the driver to avoid secondary collisions
Solution Approach 1:
The system performs preliminary detection of secondary obstacles on the post-avoidance route before the driver would need to react. By calculating where the vehicle will travel after avoiding the primary obstacle and checking for secondary obstacles in advance, the system maintains driver control while ensuring safety through early warning and automatic control prohibition when necessary.
Solution Approach 2:
The system continuously monitors the situation after primary obstacle avoidance, calculating post-avoidance routes and detecting secondary obstacles. This feedback mechanism allows the system to assess whether driver control should continue or be overridden, maintaining driver autonomy while providing safety feedback when secondary collisions are predicted.
3Productivity
If the automatic turn control is permitted after avoidance to reach the destination efficiently, then the vehicle can follow the optimal route, but the vehicle may collide with secondary obstacles on the post-avoidance route
Solution Approach 1:
The system applies preliminary anti-action by detecting secondary obstacles on the post-avoidance route and prohibiting automatic turn control before the vehicle reaches them. This preemptive measure prevents the harmful effect of secondary collisions while allowing efficient routing to continue where safe, resolving the contradiction between route efficiency and collision risk.
Solution Approach 2:
The post-avoidance route calculation and secondary obstacle detection act as an intermediary between the primary collision avoidance and the final destination. This intermediary layer evaluates the safety of continuing automatic turn control, allowing efficient routing only when no secondary obstacles are present, thus mediating between productivity and safety.
Data Source
AI summary
An avoidance route calculation part calculates an avoidance route for avoiding a collision between an own vehicle and an obstacle through a collision avoidance assist control (an automatic brake control and an automatic steering control). A post-avoidance route calculation part calculates a post-avoidance route. A post-avoidance route collision determination part determinates whether a secondary obstacle is present on the post-avoidance route. When the secondary obstacle is determined to be present, the automatic steering control is prohibited from being performed.