Vehicle Control Device Failure Level Adaptation
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Solution Overview
Problem
Autonomous vehicles lack the ability to take safety measures for passengers in case of failures, leading to reduced passenger convenience as manual intervention or vehicle transfer is necessary, even for non-critical failures.
Innovation Solution
A vehicle control device with a failure detection unit and controller that adjusts vehicle operations based on failure levels, including notification systems to ensure passenger safety and convenience by guiding the vehicle to a stoppable position or maintenance facility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the autonomous traveling vehicle stops at a nearby stoppable position when a failure occurs, then the safety of the passenger is ensured, but the convenience of the passenger is significantly reduced
Solution Approach 1:
The system changes the control parameters and vehicle behavior based on the failure level detected. For minor failures, the vehicle continues operating with modified parameters, while for critical failures, it transitions to safety-focused control modes, resolving the contradiction by adapting the safety-convenience balance to the actual failure severity
Solution Approach 2:
The vehicle control system dynamically adjusts its operation mode based on real-time failure detection. The system transitions between different control states (normal operation, degraded operation, emergency stop) depending on the failure level, allowing flexibility in balancing safety and convenience rather than following a fixed response protocol
2Ease of operation
If the vehicle continues traveling to the destination when a non-critical failure occurs, then the convenience of the passenger is maintained, but the safety measure is insufficient
Solution Approach 1:
The system modifies operational parameters based on failure severity. For non-critical failures, it adjusts parameters to allow continued travel while monitoring the situation, whereas for critical failures, it prioritizes safety by restricting movement. This dynamic parameter adjustment resolves the contradiction between maintaining convenience and ensuring safety
3Reliability
If repair or transfer is required when the vehicle fails, then the safety of the passenger is ensured, but the time and effort required increases
Solution Approach 1:
The system performs preliminary assessment of the failure level and proactively determines the appropriate response before the situation escalates. By detecting failures early and categorizing them by severity, the system can plan and execute the most efficient response (continued operation, modified operation, or emergency stop), minimizing unnecessary time loss while ensuring safety
Data Source
AI summary
A vehicle control device includes a failure detection unit configured to detect a failure of a vehicle, and a vehicle controller configured to control the vehicle. The vehicle controller changes the control of the vehicle depending on a failure level when the failure detection unit detects a failure of an on-vehicle component other than the vehicle control device.