Vehicle Collision Avoidance Control for Lane Change vs Turn Detection
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Solution Overview
Problem
Existing vehicle collision avoidance assist systems unnecessarily execute collision avoidance controls during lane changes, which can lead to unnecessary braking or steering interventions, while failing to maintain collision avoidance during turns.
Innovation Solution
The system employs an electronic control unit that differentiates between lane changes and turns by monitoring the vehicle's turning angle, steering angle changes, and reversed steering operations, adjusting conditions to avoid unnecessary collision avoidance controls during lane changes without compromising turn-based collision detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collision avoidance control is stopped when the own vehicle turns and a reversed steering operation is detected, then unnecessary collision avoidance control during lane changes is prevented, but collision avoidance control during actual turns is also eliminated
Solution Approach 1:
The patent changes the parameter used to detect reversed steering operations from a simple steering angle change to a combination of steering angle and steering angle change rate. By setting the steering angle change rate threshold to 50 deg/s or more, the system distinguishes between lane changes (lower steering rate) and turns (higher steering rate), allowing collision avoidance control to be selectively maintained or stopped based on the actual driving maneuver
Solution Approach 2:
The patent introduces dynamic thresholds for steering angle and steering angle change rate that adapt based on vehicle speed and other driving conditions. The steering angle change rate threshold of 50 deg/s is applied dynamically during the turning process, allowing the system to accurately identify lane changes versus turns in real-time and adjust collision avoidance control accordingly
2Reliability
If the collision avoidance control is executed during lane changes, then safety is improved, but unnecessary braking or steering interventions occur
Solution Approach 1:
The patent uses parameter changes in steering angle and steering angle change rate to distinguish between lane changes and turns. By monitoring these parameters and comparing them against predefined thresholds (steering angle change rate of 50 deg/s or more), the system identifies lane changes and selectively stops collision avoidance control only during these maneuvers, preventing unnecessary interventions while maintaining safety during actual turns
Solution Approach 2:
The patent implements a feedback mechanism where the system continuously monitors steering angle and steering angle change rate, compares them against thresholds, and adjusts collision avoidance control execution accordingly. This closed-loop control ensures that collision avoidance is maintained during turns while being suppressed during lane changes, eliminating unnecessary interventions
Data Source
AI summary
A vehicle collision avoidance assist apparatus keeps stopping a collision avoidance control to avoid a collision of an own vehicle with an object ahead of the own vehicle when the own vehicle turns, a predetermined condition is satisfied, and a collision condition is satisfied. While the own vehicle turns, the apparatus acquires an own vehicle turning angle which is an angle which the own vehicle has turned about a turning center from when the own vehicle starts turning and change the predetermined condition, depending on the own vehicle turning angle.