Autonomous Driving Control System Relay Fault Management
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Solution Overview
Problem
Existing autonomous driving systems lack the capability to manage faults or malfunctions in electric power supply systems, which can lead to unstable vehicle behavior during autonomous driving.
Innovation Solution
An autonomous driving control system that includes an electric power supply circuit with multiple power supplies and a relay device, a fault detector, and a controller, which can restrict autonomous driving functions when specific fault patterns are detected in the relay device, ensuring continued operation by switching to redundant power supply paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the autonomous driving control system continues full control functions when relay device faults occur, then the autonomous driving control function is maintained, but vehicle stability deteriorates due to potential power supply failures
Solution Approach 1:
When a fault in the relay device is detected, the autonomous driving control unit restricts the autonomous driving control function to partial operations rather than completely stopping or maintaining full functionality. This allows the system to continue operating with reduced capability, balancing reliability and stability by performing only essential functions that do not exacerbate the fault condition.
2Stability of the object's composition
If the autonomous driving control system restricts control functions when relay device faults are detected, then vehicle stability is improved, but the autonomous driving control function is reduced
Solution Approach 1:
The system implements partial action by restricting rather than completely disabling the autonomous driving control function. The autonomous driving control unit determines which specific functions to restrict based on the fault pattern, allowing essential functions to continue while limiting functions that could worsen the instability, thus maintaining a balance between stability and functionality.
Solution Approach 2:
The fault detector continuously monitors the relay device status and provides feedback to the autonomous driving control unit. When a fault pattern is detected, this feedback triggers the restriction of autonomous driving control functions. The system maintains this restricted state until the fault is resolved, using continuous feedback to dynamically adjust the control function level.
3Device complexity
If no fault detection mechanism is implemented, then the system structure remains simple, but the system cannot respond to power supply failures causing unstable vehicle behavior
Solution Approach 1:
The fault detector acts as an intermediary component between the relay device and the autonomous driving control unit. It specifically monitors for fault patterns in the relay device and communicates this information to the control unit, enabling the system to respond to power supply issues without requiring complex monitoring of the entire power supply system.
Solution Approach 2:
The fault detection function is extracted as a separate, dedicated component rather than being integrated into the existing control systems. This allows the system to gain fault detection capability with minimal added complexity, as the fault detector is a specialized component focused solely on monitoring relay device health.
Data Source
AI summary
An autonomous driving control system is configured to perform autonomous driving of a vehicle. The autonomous driving control system includes: an electric power supply circuit including a plurality of electric power supplies, electric power supply lines respectively belonging to a plurality of systems and a relay device; a fault detector configured to detect a fault state of the relay device; an electric power supply controller configured to control the electric power supply circuit; and an autonomous driving control unit provided to control the autonomous driving of the vehicle. The autonomous driving control unit is configured to perform, upon detection by the fault detector of occurrence of a fault corresponding to a specific fault pattern in the relay device, a restricted autonomous driving control in which part of a control function of the autonomous driving is restricted compared to when no fault corresponding to the specific fault pattern is detected.