Autonomous Driving Kit Bus Switching During Vehicle Platform Faults
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Solution Overview
Problem
Existing vehicles with autonomous driving systems face challenges in determining from which bus (main or sub) to send control commands when a system malfunction occurs, leading to potential failures in autonomous driving operations.
Innovation Solution
A vehicle platform and autonomous driving kit configuration that includes a main and sub vehicle control interface box, allowing for identification of capability values through separate buses, enabling the kit to determine the appropriate bus for command transmission based on system capability during malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single bus is used for communication between the autonomous driving kit and vehicle control systems, then the system structure is simple, but the system reliability deteriorates when malfunctions occur
Solution Approach 1:
The communication bus is segmented into a main bus and a sub bus, allowing the autonomous driving kit to communicate with different vehicle control systems through separate communication paths. This segmentation enables fault isolation and ensures that malfunctions in one bus do not completely disable autonomous driving functionality.
Solution Approach 2:
The system prepares redundant communication paths (main bus and sub bus) in advance before malfunctions occur. When a malfunction is detected in one bus, the system can switch to the other bus, providing a cushioning effect that prevents complete system failure and maintains autonomous driving capability.
2Measurement precision
If the autonomous driving kit must determine from which bus to send commands during malfunctions, then the capability identification becomes complex, but the control precision improves
Solution Approach 1:
The vehicle control systems perform preliminary actions by actively transmitting their capability identification information to the autonomous driving kit through the communication buses. This allows the autonomous driving kit to know in advance which systems are functional and ready to receive commands, eliminating the need for complex real-time determination during malfunctions.
Solution Approach 2:
The system implements feedback mechanisms where vehicle control systems continuously report their operational status and capability information to the autonomous driving kit. This feedback enables the autonomous driving kit to accurately identify which bus and corresponding control system should be used for command transmission, improving control precision while managing complexity through automated status reporting.
Data Source
AI summary
A vehicle includes a VP, the VP including a specific system, an ADK attachable to and removable from the VP, the ADK giving an instruction for autonomous driving, a main communication bus, a sub communication bus, a main VCIB configured to communicate with the ADK through the main communication bus, the main VCIB giving a control instruction to the specific system in accordance with an instruction from the ADK, and a sub VCIB configured to communicate with the ADK through the sub communication bus, the sub VCIB giving a control instruction to the specific system in accordance with an instruction from the ADK. When the VP has a malfunction, the main VCIB outputs to the ADK, information for identification that allows identification of a capability value of the specific system (S214), whereas the sub VCIB outputs the information for identification to the ADK (S214).