Vehicle Control Interface Box for Autonomous Mode Recovery
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Solution Overview
Problem
Existing vehicles operating in autonomous mode may revert to manual mode upon reboot of the computer managing the operation mode due to temporary stops, such as internal abnormalities or power supply issues, disrupting autonomous operation.
Innovation Solution
A vehicle system with redundant control devices and a vehicle control interface box that records operation mode information in a backup RAM, allowing the system to resume autonomous mode after reboot by switching control to a secondary control device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the computer is temporarily stopped due to abnormalities or power supply issues during autonomous mode operation, then the computer can be restarted, but the operation mode reverts to manual mode and autonomous operation cannot continue
Solution Approach 1:
The system performs preliminary recording of the operation mode in the backup RAM before any potential reboot occurs. This ensures that when the computer restarts after an abnormality or power supply issue, the previously recorded operation mode information is already available, allowing the system to restore autonomous mode without reverting to manual mode.
Solution Approach 2:
The backup RAM serves as an intermediary storage device between the first computer and the control system. It preserves the operation mode information during computer reboots, acting as a mediator that prevents loss of critical mode data and enables seamless restoration of autonomous operation after system restarts.
2Reliability
If the computer is restarted after temporary stop, then the system can recover from abnormality, but the operation mode cannot be maintained and autonomous driving control is lost
Solution Approach 1:
The system implements a feedback mechanism where the first computer reads the previously recorded operation mode information from the backup RAM after rebooting. This feedback loop ensures that the system automatically restores the correct operation mode (autonomous or manual) based on the recorded state, thereby maintaining autonomous driving control after system recovery from abnormalities or power supply issues.
Data Source
AI summary
The vehicle comprises a vehicle platform (VP) and an autonomous driving kit (ADK). VP comprises a first control device, and ADK comprises a second control device. The vehicle control interface box (VCIB) included in VP includes a first computer configured to communicate with both the first control device and the second control device. The first computer detects an operation mode selected from options including an autonomous mode and a manual mode, and records operation mode information indicating the detected operation mode. The first control device is configured to control the vehicle according to the operation mode detected by VCIB. At the time of restart, the first computer detects the selected operation mode based on the operation mode information recorded immediately before the stop.