Vehicle Control Interface for Safe Autonomous-to-Manual Handover
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Solution Overview
Problem
The existing vehicle control systems for autonomous driving do not effectively manage the transition from autonomous driving mode to manual driving mode, particularly when the vehicle is in motion or unable to receive instructions from the autonomous driving system, leading to potential safety issues and inappropriate switching.
Innovation Solution
A vehicle control device with a processor that manages transitions between autonomous and manual driving modes, prohibiting mode changes when the vehicle is in motion and allowing transitions only when the vehicle is immobile, such as upon activation of an emergency stop switch, ensuring safe and appropriate switching between modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle control device allows transition from autonomous driving mode to manual driving mode when the vehicle is in motion, then the driver can switch modes freely, but the driver cannot appropriately handle the transition and safety issues arise
Solution Approach 1:
The system performs preliminary action by checking whether the vehicle is stopped before allowing mode transition. The processor determines the vehicle's motion state in advance and only permits transition from autonomous to manual driving mode when the vehicle is confirmed to be stopped, preventing unsafe transitions during motion
Solution Approach 2:
The processor acts as an intermediary between the autonomous driving system and the vehicle platform, mediating the mode transition request by verifying the vehicle's motion state and controlling whether the transition is permitted, thereby ensuring safety while maintaining operational flexibility
2Reliability
If the vehicle control device prohibits transition from autonomous driving mode to manual driving mode when the vehicle is not stopped, then the safety of mode transition is improved, but the ease of mode switching deteriorates
Solution Approach 1:
The system applies dynamics by making the mode transition capability conditional rather than fixed. The processor dynamically adjusts the permission status of mode transition based on the real-time motion state of the vehicle, allowing transition when stopped and prohibiting it when moving, thus adapting to operational conditions
3Speed
If the vehicle control device allows transition to autonomous driving mode when the vehicle platform cannot be activated, then the system responds quickly to mode requests, but abnormal mode changes occur in unstable states
Solution Approach 1:
The system performs preliminary verification by checking whether the vehicle platform can be activated before permitting transition to autonomous driving mode. The processor confirms the platform's operational readiness in advance, preventing transitions to unstable states and ensuring reliable autonomous driving operation
Data Source
AI summary
The vehicle control device is a vehicle control device connected between an autonomous driving system and a vehicle platform that performs automated driving in accordance with a command from the autonomous driving system, and includes a memory in which a program including a predetermined API defined for each signal is stored, and a processor that controls the vehicle platform in response to the command from the autonomous driving system by executing the program. The vehicle control device has a manual driving mode and an automatic driving mode as vehicle modes. The vehicle platform is capable of receiving a manual driving operation in the manual driving mode, and is capable of receiving a driving command from the autonomous driving system in the automatic driving mode. The processor prohibits the transition from the automatic driving mode to the manual driving mode on condition that the vehicle platform is not stopped.