Collision Avoidance Steering Logic for Turn Signal Conflicts
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Solution Overview
Problem
Conventional collision avoidance systems may cause unnecessary steering maneuvers or collisions when a frontward vehicle's turn indicators indicate a different direction than the planned collision avoidance path, leading to driver discomfort or collision risks.
Innovation Solution
The system determines the state of the frontward vehicle's turn indicators and adjusts the collision avoidance steering control start conditions based on whether the indicated direction matches the planned collision avoidance direction, delaying the start when they differ, and using different threshold distances and times for initiating control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the start condition for collision avoidance steering control is set to be satisfied when the turn indicators of the frontward vehicle are not indicating a turning direction, then the steering control can be started earlier to avoid collision, but the steering control may be unnecessarily activated when the frontward vehicle is actually changing lanes
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the start condition parameters for steering control based on the state of turn indicators. When turn indicators are not active, a first start condition is used; when turn indicators indicate a turning direction, a second start condition is applied. This parameter adjustment allows the system to adapt to different scenarios, reducing unnecessary activations while maintaining collision avoidance capability.
2Object-generated harmful factors
If the start condition is set to require turn indicators to be inactive, then unnecessary steering control is reduced, but the steering control cannot be activated early enough when the frontward vehicle is moving straight
Solution Approach 1:
The patent implements dynamics by making the start condition flexible and adaptive rather than static. The system dynamically switches between different start conditions (first and second start conditions) based on the real-time state of turn indicators. This dynamic adjustment optimizes both the timing of steering control activation and the reduction of unnecessary activations.
3Reliability
If the inter-vehicular distance threshold is set to be longer, then collision avoidance can be ensured with more margin, but the steering control may activate even when the frontward vehicle is changing lanes
Solution Approach 1:
The patent applies feedback by continuously monitoring the state of turn indicators of the frontward vehicle and using this information to adjust the start condition for steering control. This feedback mechanism allows the system to distinguish between vehicles moving straight and vehicles changing lanes, thereby reducing false activations while maintaining adequate collision avoidance margins.
Data Source
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AI summary
When a collision avoidance steering control start condition becomes satisfied, a driving support ECU (20) starts a steering control to avoid a collision with a frontward vehicle (OV1). The ECU (20) prohibits the steering control when an indicated direction by turn indicators of the frontward vehicle (OV1) is the same as a planned direction of the steering control. The ECU (20) sets the start condition to a first start condition, when the turn indicators of the frontward vehicle (OV1) are not indicating a turning direction. The ECU (20) sets the start condition to a second start condition, when the indicated direction is different from the planned direction. The first and second start conditions have been set such that an inter-vehicular distance between the host vehicle (SV) and the frontward vehicle (OV1) of when the second start condition can be satisfied is shorter than one of when the first start condition can be satisfied.