Vehicle Trajectory Deviation Alerts for Occupant Comfort
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Solution Overview
Problem
Occupants in vehicles under travel control may feel uncomfortable or uneasy when unexpected vehicle behaviors occur due to travel control systems, as they cannot anticipate these behaviors.
Innovation Solution
A vehicle control system that calculates the deviation between predicted and target trajectories, providing notifications to occupants when the deviation meets certain criteria, allowing them to understand upcoming vehicle behaviors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If vehicle travel control is implemented to enable autonomous driving, then productivity and ease of operation are improved, but occupants may feel uncomfortable or uneasy due to unexpected vehicle behaviors that they cannot anticipate
Solution Approach 1:
The system performs preliminary action by notifying occupants in advance of target vehicle behaviors before they occur. The notification is provided based on calculated deviation between predicted and target trajectories, allowing occupants to mentally prepare for upcoming maneuvers. This resolves the contradiction by maintaining autonomous driving capability while reducing occupant discomfort through advance information about vehicle actions.
2Object-affected harmful factors
If the system provides notifications for all vehicle behaviors under travel control, then occupant comfort is improved, but device complexity and information processing requirements increase
Solution Approach 1:
The system applies local quality by providing notifications selectively rather than uniformly for all vehicle behaviors. Notifications are generated only when deviation between predicted and target trajectories exceeds a threshold, meaning significant or unexpected behaviors. This resolves the contradiction by reducing unnecessary notifications while still informing occupants of important vehicle actions that may cause discomfort.
Solution Approach 2:
The system uses parameter changes by calculating deviation as a quantitative metric between predicted and target trajectories. When this deviation parameter exceeds a predetermined threshold, notifications are triggered. This objective parameter-based approach resolves the contradiction by providing a clear, automated criterion for notification that balances occupant comfort with system simplicity.
3Measurement precision
If the system calculates and monitors deviation between predicted and target trajectories, then notification accuracy is improved, but loss of time for calculation and processing increases
Solution Approach 1:
The system applies partial action by calculating deviation only for key trajectory parameters and comparing against thresholds rather than continuously analyzing all possible vehicle state variables. This selective calculation approach maintains notification accuracy for significant behaviors while reducing computational time and processing requirements.
Data Source
AI summary
The vehicle control system generates a target trajectory based on the driving environment of the vehicle, and performs vehicle travel control for controlling the vehicle to follow the target trajectory. The vehicle control system calculates a predicted trajectory or a degree of deviation between the predicted vehicle state and the target trajectory predicted from the current vehicle state of the vehicle. When the degree of deviation satisfies the notification providing condition, the vehicle control system provides a notification indicating a target behavior of the vehicle caused by the vehicle travel control to the occupant of the vehicle.