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Controller configurations are crucial in a car's cruise control system because they manage speed over time to maintain a consistent pace regardless of road conditions, thereby meeting design goals. In traditional control systems, fixed-configuration design involves predetermined controller placement. System performance modifications are known as compensation.
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Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
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A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
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Multi-Objective Sliding Mode Control on Vehicle Cornering Stability with Variable Gear Ratio Actuator-Based Active

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This study introduces an active front steering (AFS) system using a variable gear ratio steering (VGRS) actuator and sliding mode control (SMC) to enhance vehicle cornering stability. Simulation results demonstrate improved vehicle stability during maneuvers.

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Area of Science:

  • Automotive Engineering
  • Control Systems Engineering
  • Vehicle Dynamics

Background:

  • Active Front Steering (AFS) enhances vehicle cornering stability by adding steering input.
  • Variable Gear Ratio Steering (VGRS) actuators offer adaptable steering ratios.
  • Sliding Mode Control (SMC) is a robust control strategy for nonlinear systems.

Purpose of the Study:

  • To propose and evaluate an AFS system integrated with a VGRS actuator controlled by SMC.
  • To enhance vehicle cornering stability by simultaneously managing sideslip angle and yaw rate.
  • To validate the proposed AFS-SMC system's effectiveness through simulation.

Main Methods:

  • Detailed modeling of the AFS system mechanism and sensor integration.
  • Design of a Sliding Mode Control (SMC) strategy considering sideslip angle and yaw rate.
  • Implementation of Sine with Dwell and accident avoidance tests for performance evaluation.

Main Results:

  • The proposed SMC strategy effectively controls the AFS system with a VGRS actuator.
  • Simulations show significant improvements in vehicle cornering stability.
  • The system successfully manages critical vehicle dynamics parameters like sideslip angle and yaw rate.

Conclusions:

  • The developed AFS system with SMC and VGRS actuator enhances vehicle cornering stability.
  • The control strategy is effective in practical vehicle maneuvering scenarios.
  • This approach offers a promising solution for improving vehicle safety and performance.