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This study introduces a fuzzy PID controller for steer-by-wire (SBW) systems, enhancing vehicle stability. The new strategy improves front wheel angle control for safer, more responsive steering, especially at high speeds.

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Area of Science:

  • Automotive Engineering
  • Control Systems
  • Robotics

Background:

  • Steer-by-wire (SBW) systems are critical for modern vehicle chassis control.
  • Precise and fast wheel angle control is essential for optimal SBW performance and vehicle dynamics.

Purpose of the Study:

  • To develop and validate an advanced control strategy for enhancing steer-by-wire system performance.
  • To improve the accuracy and responsiveness of front wheel angle control in vehicles.

Main Methods:

  • A dynamics model of the steering actuator was established.
  • A co-simulation vehicle model using CarSim and Simulink was created and validated.
  • A dual-layer fuzzy PID controller with a front wheel angle compensation strategy was designed and implemented.

Main Results:

  • The proposed fuzzy PID controller with front wheel angle compensation significantly improved vehicle steering stability.
  • Simulations demonstrated reduced peak yaw rates and faster convergence speeds, particularly at high speeds.
  • The controller achieved progressive tracking of the desired front wheel angle by compensating for actual vs. ideal differences.

Conclusions:

  • The developed front wheel angle compensation strategy effectively enhances the stability and responsiveness of SBW systems.
  • The dual-layer fuzzy PID controller offers a robust solution for closed-loop feedback control of the front wheel angle.
  • This approach is particularly beneficial for improving vehicle handling and safety during dynamic maneuvers at high velocities.