Vehicle Backup Control Using Regenerative Braking and Brake Steering
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Solution Overview
Problem
Existing vehicle motion controllers, such as braking and steering systems, can achieve ASILD safety levels but fail to provide full functionality without increasing costs, and when failures occur, they cannot be safely transitioned to driver control.
Innovation Solution
Implement a backup braking system using a regenerative motor, a backup steering system controlling the braking system, and a backup parking system alternating between motor and braking system operations to maintain vehicle control after failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant braking system and steering system are equipped to meet functional safety requirements, then system reliability is improved, but device complexity and cost increase
Solution Approach 1:
The braking system is designed to perform multiple functions: normal braking, backup braking when steering fails, and backup steering when the steering system fails. The motor controller is configured to switch between driving mode and backup braking mode, allowing the same hardware to serve multiple safety-critical functions without requiring separate dedicated systems for each function.
Solution Approach 2:
The patent combines the backup braking and backup steering functions into a single integrated braking system controlled by a unified control unit. Instead of implementing separate redundant systems for braking and steering, the solution merges these safety functions into one system that can dynamically switch between different operational modes based on failure detection.
2Reliability
If a redundant braking system and steering system are equipped to meet functional safety requirements, then system reliability is improved, but cost increases
Solution Approach 1:
The braking system is designed to perform multiple functions: normal braking, backup braking when steering fails, and backup steering when the steering system fails. The motor controller is configured to switch between driving mode and backup braking mode, allowing the same hardware to serve multiple safety-critical functions without requiring separate dedicated systems for each function.
Solution Approach 2:
The patent combines the backup braking and backup steering functions into a single integrated braking system controlled by a unified control unit. Instead of implementing separate redundant systems for braking and steering, the solution merges these safety functions into one system that can dynamically switch between different operational modes based on failure detection.
3Reliability
If the braking system is used for backup steering control, then system reliability is improved, but the braking system experiences increased use of energy and accelerated wear
Solution Approach 1:
The control unit implements periodic monitoring of system status to detect failures in the steering or braking systems. By continuously or periodically checking system health, the control unit can quickly transition to backup modes only when necessary, rather than operating in backup mode continuously, thereby reducing unnecessary energy consumption and wear on the braking system components.
Solution Approach 2:
The system dynamically adjusts its operational mode based on real-time failure detection. The braking system operates in normal mode during healthy conditions and switches to backup steering mode only when steering failure is detected. This dynamic adaptation ensures the braking system consumes energy and experiences wear only when actually providing backup steering assistance, not during normal operation.
4Reliability
If the motor and braking system work alternately for parking, then system reliability is improved, but control complexity increases
Solution Approach 1:
The control unit implements periodic monitoring of system status to detect failures in the steering or braking systems. By continuously or periodically checking system health, the control unit can quickly transition to backup modes only when necessary, rather than operating in backup mode continuously, thereby reducing unnecessary energy consumption and wear on the braking system components.
Solution Approach 2:
The system dynamically adjusts its operational mode based on real-time failure detection. The braking system operates in normal mode during healthy conditions and switches to backup steering mode only when steering failure is detected. This dynamic adaptation ensures the braking system consumes energy and experiences wear only when actually providing backup steering assistance, not during normal operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures safe vehicle operation and transition to driver control without increasing hardware costs, maintaining functionality during system failures.
Implementation Method 1
activating a backup braking system, the backup braking system decelerating a vehicle by controlling a regenerative motor
Implementation Method 2
implementing parking by controlling a motor and the braking system to work alternately
Data Source
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Figure 2
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AI summary
This application relates to a vehicle control method and system, a vehicle, and a storage medium. The vehicle control method includes: when a braking system fails, activating a backup braking system, the backup braking system decelerating a vehicle by controlling a regenerative motor; when a steering system fails, implementing transverse control over the vehicle by controlling the braking system; and when a parking system fails, implementing parking by controlling a motor and the braking system to work alternately. According to this method, safety control over the vehicle can be implemented when the original braking system, steering system, or parking system fails.