Vehicle Control Device Abnormality Detection and Action Plan Adjustment
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Solution Overview
Problem
Existing automatic driving technologies face challenges in accurately controlling vehicles when sensor abnormalities occur, leading to potential unexpected vehicle movements, and relying on redundant sensors increases costs and weight.
Innovation Solution
A vehicle control device and method that includes a travel control unit, abnormality detection unit, and changing unit to adjust the control state based on detected abnormalities, allowing transition to manual driving mode and modifying control actions within an action plan to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant sensors are provided to avoid control abnormalities, then reliability is improved, but cost and weight increase
Solution Approach 1:
The system dynamically adjusts the action plan based on detected abnormalities, transitioning from a fixed control approach to an adaptive one that modifies control actions in real-time according to the abnormality type and current vehicle state
Solution Approach 2:
The system changes control parameters and actions based on the detected abnormality, selecting different control strategies from the action plan depending on the abnormality type, thereby maintaining reliability without adding redundant sensors
2Reliability
If redundant sensors are provided to avoid control abnormalities, then reliability is improved, but device complexity increases
Solution Approach 1:
The control system dynamically adapts its behavior based on abnormality detection, using software-based flexibility rather than hardware redundancy to maintain reliability
Solution Approach 2:
The patent replaces the mechanical approach of adding redundant sensors with an information-processing approach that uses abnormality detection and action plan modification to maintain control reliability
3Productivity
If automatic driving continues without control changes during abnormality, then productivity is maintained, but stability deteriorates due to unexpected vehicle movements
Solution Approach 1:
The system dynamically modifies the action plan based on the detected abnormality, allowing automatic driving to continue with adjusted control actions that account for the abnormality rather than maintaining a fixed control approach
Solution Approach 2:
The system takes preliminary action by detecting abnormalities and modifying control actions before unexpected vehicle movements can occur, preventing instability rather than reacting to it
Data Source
AI summary
A vehicle control device includes a travel control unit configured to control travel of a vehicle on the basis of an action plan including a plurality of events that are sequentially executed to control acceleration and deceleration or steering when the vehicle travels; an abnormality detection unit configured to detect a specific abnormal state that affects a control result of the travel control unit based on the action plan; and a changing unit configured to change content controlled by the travel control unit on the basis of either or both of a type of an event being executed according to control by the travel control unit and a type of an event scheduled to be executed following the event being executed among events included in the action plan when the specific abnormal state is detected by the abnormality detection unit.