Dynamic Threshold Adjustment for Autonomous Driving Mode Switching
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Solution Overview
Problem
Existing autonomous driving systems face challenges in smoothly switching from autonomous driving to manual driving, as current threshold values for switching are either too high, making intentional driver operations difficult, or too low, leading to frequent erroneous switches due to accidental driver inputs.
Innovation Solution
An autonomous driving device that calculates a dynamic threshold value for switching based on the direction of the steering operation relative to recognized obstacles, with higher values required when steering towards obstacles and lower values when steering away or no obstacles are present, and displays these threshold values to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the threshold value for switching from autonomous driving to manual driving is set too large, then erroneous switching due to accidental driver inputs is reduced, but intentional driver operations become difficult to execute
Solution Approach 1:
The patent applies dynamics by making the threshold value changeable based on driving conditions. Specifically, the threshold value is dynamically adjusted according to the type of autonomous driving execution (e.g., different threshold levels for different autonomous driving modes or environmental conditions), allowing the system to be more responsive to intentional driver inputs in certain conditions while maintaining stability in others.
Solution Approach 2:
The patent implements parameter changes by modifying the threshold value parameter based on the autonomous driving execution type. The system stores multiple threshold values corresponding to different autonomous driving execution types and selects the appropriate threshold based on the current execution type, thereby resolving the contradiction between reliability and ease of operation through parameter adaptation.
2Ease of operation
If the threshold value for switching from autonomous driving to manual driving is set too small, then driver operability is improved, but erroneous or accidental operations by the driver are too easily reflected in vehicle behavior
Solution Approach 1:
The system dynamically adjusts the threshold value based on the autonomous driving execution type, making the switching mechanism adaptive rather than static. This allows the system to maintain high operability when conditions are favorable while preventing erroneous switches when conditions suggest higher risk.
Solution Approach 2:
The patent changes the threshold parameter according to the autonomous driving execution type, storing and selecting from multiple threshold values. This parameter adaptation enables the system to optimize the balance between operability and reliability for different driving scenarios.
3Device complexity
If a fixed threshold value is used for switching, then system complexity is reduced, but the system cannot adapt to different driving conditions and scenarios
Solution Approach 1:
The patent introduces dynamics by making the threshold value adaptable to different autonomous driving execution types. The system automatically selects appropriate threshold values based on the current execution type, providing adaptability without requiring complex manual configuration or intervention.
Solution Approach 2:
The system implements parameter changes by storing multiple threshold values corresponding to different autonomous driving execution types and automatically selecting the appropriate parameter based on current conditions. This approach maintains relative system simplicity while achieving adaptability through parameter variation.
Data Source
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AI summary
Disclosed is an autonomous driving device (100) in which a threshold value (Tth) for switching to manual driving which is used for switching a driving state from autonomous driving to manual driving with respect to degree to which a steering operation is carried out by a driver is calculated to be a greater value by a calculation unit (14) when the direction of the steering operation is predicted to be a direction close to an obstacle than a threshold value when the direction of the steering operation is predicted to be a direction away from the obstacle or a threshold value when no obstacle is detected.