Coordinated fault-tolerant pressure control for integrated electro-hydraulic braking system

Area of Science:

• Automotive Engineering
• Control Systems
• Robotics

Background:

• Integrated electro-hydraulic braking systems are crucial for intelligent vehicles.
• System faults can compromise braking performance and safety.
• Existing control methods may not adequately address coordinated control and fault tolerance simultaneously.

Purpose of the Study:

• To propose a coordinated control method for master and wheel cylinders in integrated electro-hydraulic braking systems.
• To design fault-tolerant control strategies for system faults.
• To ensure precise pressure control and system coordination under fault conditions.

Main Methods:

• Development of a control-oriented model for the integrated electro-hydraulic braking system.
• Finite-time disturbance observer and backstepping control for master cylinder pressure.
• Adaptive sliding mode control for wheel cylinder pressure.
• Controller-in-the-loop and hardware-in-the-loop experiments.

Main Results:

• Achieved coordinated fault-tolerant control of master cylinder pressure despite faults and disturbances.
• Enabled precise pressure control in faulty wheel cylinders through adaptive sliding mode control.
• Demonstrated the superiority of the proposed model-based coordinated fault-tolerant control method via simulations.

Conclusions:

• The proposed method effectively manages master and wheel cylinder pressures during faults.
• Validated engineering effectiveness through simulations and hardware experiments.
• Enhances the safety and reliability of braking systems in intelligent vehicles.