Vehicle Override Control via Occupant Intention Estimation
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Solution Overview
Problem
During automatic driving, the driving intention of vehicle occupants may decrease, leading to unsuitable overrides when the system switches from automatic to manual driving, potentially occurring unintentionally.
Innovation Solution
A vehicle control system that includes an automatic driving control unit, an operation reception unit, an estimation unit, and an override control unit, which estimates the vehicle occupant's state based on seat information, load distribution, and imaging data to suppress unwanted overrides by limiting lane changes and acceleration/deceleration when a low driving intention is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If override function is enabled to switch from automatic driving to manual driving, then responsiveness to vehicle occupant needs is improved, but risk of unintentional or unsuitable override increases
Solution Approach 1:
The system continuously monitors the vehicle occupant's state through seat sensors and imaging devices, providing feedback on driving intention level. This feedback loop allows the override control unit to dynamically adjust override behavior based on real-time assessment of whether the occupant intends to take control, preventing unintentional overrides while maintaining responsive override capability when appropriate.
Solution Approach 2:
The estimation unit acts as an intermediary between the operation reception unit and the override control unit. It processes sensor data from the seat and imaging device to determine driving intention, serving as a mediator that filters and interprets occupant state information before passing control decisions to the override execution system.
2Measurement precision
If multiple sensors are used to estimate driving intention, then estimation accuracy is improved, but system complexity increases
Solution Approach 1:
The system merges data from multiple sensor sources including seat load sensors, backrest angle sensors, and imaging devices into a unified driving intention estimation. The estimation unit integrates these diverse sensor inputs to comprehensively assess occupant state, achieving high measurement precision through combined sensor information while managing complexity through centralized processing.
Solution Approach 2:
The seat assembly serves multiple functions: it provides structural support for the vehicle occupant, collects biometric and postural data through integrated sensors, and contributes to overall system monitoring. This multi-functionality reduces the need for separate dedicated sensors, thereby managing device complexity while maintaining high estimation accuracy.
Data Source
AI summary
A vehicle control system includes an automatic driving control unit configured to automatically control at least one of acceleration or deceleration and steering of a subject vehicle, an operation reception unit configured to receive an operation of a vehicle occupant of the subject vehicle, an estimation unit configured to estimate a state of the vehicle occupant, and an override control unit configured to perform an override for switching from automatic driving to manual driving on the basis of the operation from the vehicle occupant received by the operation reception unit and suppress the override in a case where a decrease of a driving intention of the vehicle occupant is estimated by the estimation unit.