Autonomous Driving Speed Limiting for Steer-By-Wire Faults
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Solution Overview
Problem
Existing vehicles with autonomous driving functions lack integrated safety controls for steer-by-wire and autonomous driving malfunctions, necessitating independent implementations that are not practical in real-world scenarios.
Innovation Solution
A vehicle control device and method that integrates steer-by-wire weakening control and autonomous driving weakening control, utilizing a malfunction diagnosis unit to adjust target vehicle speed limits based on component failures, ensuring seamless transition to manual driving mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent malfunction safety control is implemented for steer-by-wire device and autonomous driving assistance devices, then each system can be controlled separately, but the overall vehicle safety during autonomous driving with steer-by-wire malfunction is insufficient
Solution Approach 1:
The patent merges the malfunction safety control of the steer-by-wire device with the autonomous driving weakening control into a unified control system. When a malfunction is detected in either system, the control unit integrates both control strategies to execute comprehensive vehicle weakening control, ensuring that both steering and autonomous driving functions are safely managed under malfunction conditions.
Solution Approach 2:
The control unit is designed with multi-functionality to handle various malfunction scenarios. It can independently manage steer-by-wire malfunction safety control, autonomous driving assistance device malfunction safety control, and their combined effects. This universal control capability allows the system to adapt to different malfunction conditions while maintaining overall vehicle safety.
2Reliability
If both steer-by-wire weakening control and autonomous driving weakening control are executed when steer-by-wire device malfunctions during autonomous driving, then comprehensive safety control is achieved, but the control system complexity increases
Solution Approach 1:
The control unit is pre-programmed with integrated control strategies that automatically activate when specific malfunction conditions are detected. The system prepares multiple control scenarios in advance, including simultaneous execution of steer-by-wire weakening control and autonomous driving weakening control, so that when a malfunction occurs, the appropriate integrated response is immediately implemented without requiring complex real-time decision-making.
3Adaptability or versatility
If target vehicle speed limit is adjusted based on malfunction type and driving mode, then appropriate speed control is achieved for different scenarios, but the control logic becomes more complex
Solution Approach 1:
The target vehicle speed limit is dynamically adjusted based on the detected malfunction type and the current driving mode. The control unit continuously monitors system status and automatically modifies the speed limit parameters to match the appropriate safety requirements for each scenario, enabling flexible adaptation without requiring manual intervention or overly complex control logic.
Data Source
AI summary
A vehicle control device and a vehicle control method thereof are provided in the disclosure. Whether an autonomous driving assistance device, a steer-by-wire device of a vehicle, or a power supply of the vehicle has malfunctioned are determined. When it is determined that the autonomous driving assistance device, the steer-by-wire device, or the vehicle's power supply has malfunctioned while the vehicle is executing autonomous driving, vehicle weakening control is executed. In response to malfunctioning of the autonomous driving assistance device, the steer-by-wire device, or the power supply of the vehicle, and whether the vehicle switches to manual driving mode, target vehicle speed limit of the vehicle is adjusted.