ADS Mode Transition Control for Reliable Unsupervised Activation
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Solution Overview
Problem
The activation of unsupervised autonomous driving mode in vehicles may be delayed or rejected due to unmet conditions, causing driver confusion and dissatisfaction, as the vehicle's operational design domain conditions may change during the delay between offer and activation.
Innovation Solution
A driving mode transitioning system that continuously obtains vehicle situational data, determines compliance with unsupervised driving conditions, activates a supervised mode if necessary, and enables unsupervised mode activation only when positioning and velocity meet the unsupervised policy criteria, ensuring seamless transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the system offers unsupervised autonomous driving mode to the driver, then the driver can access advanced automation features, but the activation may be delayed or rejected due to changing conditions, causing driver confusion and dissatisfaction
Solution Approach 1:
The system performs preliminary actions by continuously evaluating unsupervised driving conditions and pre-positioning the vehicle state before the driver requests activation. The driving mode transitioning system assesses whether unsupervised driving conditions are met in advance, and if not, it implements the unsupervised driving mode-related driving policy to govern the supervised driving mode, preparing the vehicle for future unsupervised mode activation.
Solution Approach 2:
The system introduces feedback by continuously monitoring vehicle situational data, position, and velocity to determine compliance with unsupervised driving conditions. The system provides feedback to the driver about the status of unsupervised mode availability and automatically adjusts the driving mode based on whether conditions are met, creating a closed-loop control system that resolves the contradiction between offering the mode and ensuring reliable activation.
2Reliability
If the system waits for unsupervised driving conditions to be met before enabling activation, then activation reliability improves, but the time to activate the mode increases
Solution Approach 1:
The system maintains continuity of useful action by continuously evaluating unsupervised driving conditions without interruption. The driving mode transitioning system constantly monitors vehicle situational data, position, and velocity, ensuring that as soon as conditions are met, the unsupervised mode can be immediately activated. This continuous monitoring eliminates gaps in assessment and reduces overall activation delay while maintaining high reliability.
Solution Approach 2:
The system performs preliminary evaluation of unsupervised driving conditions continuously in the background, so that when the driver requests unsupervised mode, the system already has current information about condition compliance. This preliminary assessment readiness reduces the perceived delay for the driver while ensuring activation only occurs when conditions are truly met, resolving the time-reliability contradiction.
3Ease of operation
If the system allows activation during supervised mode, then driver convenience improves, but the risk of unsafe activation increases
Solution Approach 1:
The system introduces an intermediary mechanism—the driving mode transitioning system—that acts as a mediator between the driver's activation request and the unsupervised autonomous driving mode. This intermediary continuously evaluates unsupervised driving conditions and vehicle state, and only permits activation when conditions are satisfied. The intermediary implements the unsupervised driving mode-related driving policy to govern the supervised driving mode, ensuring safe transition while maintaining driver convenience.
Solution Approach 2:
The system uses feedback control to continuously monitor whether unsupervised driving conditions are met before allowing activation. The driving mode transitioning system provides feedback about the safety status and condition compliance, and only enables unsupervised mode activation when the feedback confirms conditions are satisfied. This feedback mechanism maintains ease of operation by allowing quick activation requests while preventing unsafe activation through continuous safety verification.
Data Source
AI summary
A driving mode transitioning system and method for supporting transitioning to an unsupervised autonomous driving mode of an Automated Driving System, ADS, of a vehicle. The driving mode transitioning system obtains vehicle situational data indicating a state of vehicle surroundings along with position and heading of the vehicle; determines based on the obtained vehicle situational data, that unsupervised driving conditions of an unsupervised driving mode-related driving policy pertinent an unsupervised autonomous driving mode of the ADS, are complied with; determines that the ADS has active a supervised driving mode; implements the unsupervised driving mode-related driving policy to govern the supervised driving mode; and enables the unsupervised autonomous driving mode to be activated for the ADS, when positioning and/or velocity of the vehicle has reached compliance with unsupervised dynamic driving conditions of the unsupervised driving mode-related driving policy.