Autonomous Driving Takeover Speed Control for Safe Driver Transition
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Solution Overview
Problem
Existing autonomous driving systems face challenges in ensuring sufficient time for transitioning control authority to the driver during sudden situations, which can lead to safety risks due to the potential for insufficient time to take over control, especially when a sudden situation occurs during autonomous driving.
Innovation Solution
An autonomous driving control apparatus and method that includes a processor in an autonomous vehicle to determine if a predetermined condition for transitioning to manual driving mode is met, sets a speed limit based on various factors such as road conditions, weather, and surrounding vehicle speeds, and outputs a transition demand to the driver while controlling the vehicle's speed to not exceed this limit, ensuring a safe transition by calculating a suitable speed limit that allows for timely intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the autonomous driving system maintains high speed during autonomous driving mode, then productivity is improved, but safety deteriorates when transition to manual mode is required
Solution Approach 1:
The system dynamically adjusts the vehicle speed limit based on the transition demand state. When a transition demand is issued, the speed limit is reduced to a lower value that ensures the driver can take over control within the available time. This dynamic adjustment resolves the contradiction by making speed adaptive to the operational context rather than maintaining a fixed high speed.
Solution Approach 2:
The system changes the speed parameter based on the transition demand state. By setting different speed limits corresponding to different operational states (normal autonomous driving vs. transition demand), the system ensures that safety requirements are met during critical transition periods while maintaining productivity during normal operation.
2Loss of time
If the autonomous driving system travels at high speed, then time for transition is reduced, but the ability to ensure sufficient transition time deteriorates
Solution Approach 1:
The system performs preliminary action by calculating and setting an appropriate speed limit before the transition occurs. By determining the speed limit in advance based on the transition demand state and current vehicle conditions, the system ensures that sufficient time will be available for the driver to take over control, preventing last-minute rushed transitions.
Solution Approach 2:
The system uses feedback from the transition demand state and vehicle sensor data to continuously adjust the speed limit. This feedback mechanism ensures that the speed is always appropriate for the current transition situation, allowing the system to respond to changing conditions and maintain sufficient transition time.
3Ease of operation
If the autonomous driving system maintains high speed, then convenience is improved, but safety deteriorates during sudden situations
Solution Approach 1:
The system makes speed dynamic rather than fixed, adjusting it based on the transition demand state and surrounding environment. This allows the system to maintain high speeds for convenience during normal operation while automatically reducing speed when transition demands arise or when sudden situations are detected, thereby eliminating the harmful effects of maintaining high speed in all conditions.
Data Source
AI summary
An autonomous driving control apparatus for transitioning control authority of an autonomous vehicle and a method thereof may include a processor provided in the autonomous vehicle configured to determine whether a predetermined condition required to transition to a manual driving mode while the autonomous vehicle may be traveling in an autonomous driving mode is met, determine a speed limit of the autonomous vehicle, and/or output a transition demand (TD) to a driver of the autonomous vehicle, and control autonomous driving such that a speed of the autonomous vehicle may not be greater than the speed limit while the TD is output. The autonomous driving control apparatus may be configured to include a time taken to transition control authority to the driver, thus improving safety.