Autonomous Vehicle MRM Control for Failure and Path Deviation
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Solution Overview
Problem
Autonomous vehicles face risks during unexpected events, such as component failures or deviations from designated driving paths, which can lead to accidents if not properly managed.
Innovation Solution
A vehicle system capable of performing a minimal risk maneuver (MRM) autonomously, using sensors and controllers to initiate actions like steering, braking, or lane changes to mitigate risks and transition to a safe state, without requiring driver intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If autonomous driving is performed without driver intervention, then convenience and productivity are improved, but the risk of accidents during unexpected events increases
Solution Approach 1:
The system performs preliminary risk assessment before executing autonomous driving maneuvers. When a risk is detected during autonomous driving, the system proactively initiates a minimal risk maneuver (such as emergency braking or steering avoidance) before the situation escalates into an actual accident, thereby resolving the contradiction between autonomous driving convenience and safety during unexpected events
Solution Approach 2:
The patent introduces a safety management system as an intermediary layer between the autonomous driving controller and the vehicle's actuation systems. This intermediary system continuously monitors driving conditions, assesses risks, and mediates between normal autonomous driving operations and emergency risk mitigation actions, ensuring that productivity is maintained while reliability is enhanced through structured safety protocols
2Reliability
If minimal risk maneuver is initiated to eliminate risk, then safety is improved, but the driving stability and comfort deteriorate due to sudden maneuvers
Solution Approach 1:
The system dynamically adjusts the execution of minimal risk maneuvers based on real-time assessment of surrounding conditions. Rather than applying fixed aggressive braking or steering inputs, the system modulates the intensity and timing of risk mitigation actions to balance risk elimination with maintaining driving stability and passenger comfort, resolving the contradiction between safety improvement and stability deterioration
3Reliability
If risk assessment and minimal risk maneuver are added to the autonomous driving system, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a multi-functional safety management system that integrates risk assessment, minimal risk maneuver decision-making, and execution control into a single unified system. This universal system handles multiple functions (detection, assessment, decision, and control) that would otherwise require separate dedicated systems, thereby improving reliability through comprehensive risk management while minimizing the increase in device complexity through functional integration
Data Source
AI summary
Disclosed is a vehicle which supports a minimal risk maneuver. The vehicle performs driving, perform the minimal risk maneuver when a specific event occurs during the driving, eliminates the risk of the vehicle in accordance with the initiation of the minimal risk maneuver, ends the minimal risk maneuver when the risk of the vehicle is eliminated, and performs the driving again after ending the minimal risk maneuver.