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In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
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Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
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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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Robust Adaptive Control Strategy for a Bidirectional DC-DC Converter Based on Extremum Seeking and Sliding Mode

Hoai-An Trinh1, Duc Giap Nguyen2, Van-Du Phan1

  • 1Department of Mechanical Engineering, University of Ulsan, Ulsan 44610, Republic of Korea.

Sensors (Basel, Switzerland)
|January 8, 2023
PubMed
Summary

This study introduces an adaptive control strategy for bidirectional converters, enhancing voltage regulation against disturbances. The novel method combines extended state observer-based sliding mode control with extremum seeking for improved robustness and optimal performance.

Keywords:
bidirectional DC-DC convertercontinuous sliding mode controlextended state observerextremum seekingvoltage regulation

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Area of Science:

  • Electrical Engineering
  • Control Systems

Background:

  • Bidirectional converters require robust voltage regulation under dynamic operating conditions.
  • Classical control methods often struggle with unpredictable matched and mismatched disturbances.

Purpose of the Study:

  • To develop a novel adaptive control strategy for bidirectional converters.
  • To enhance output voltage regulation accuracy and system robustness against various disturbances.

Main Methods:

  • Control-oriented modeling to capture system dynamics.
  • Extended state observer (ESO)-based continuous sliding mode control for disturbance estimation and compensation.
  • Extremum seeking (ES)-based adaptive scheme for optimal control effort and robustness.

Main Results:

  • The proposed control strategy demonstrated high tracking precision and fast disturbance rejection.
  • Effective compensation for matched and mismatched disturbances, including load variations and input voltage changes.
  • Comparative simulations showed superior performance over classical PID control.

Conclusions:

  • The combined ESO-based sliding mode control and ES-based adaptive scheme offers a robust and effective solution for bidirectional converter voltage regulation.
  • The methodology ensures optimal control effort and system stability across diverse operating scenarios.
  • Validated through simulations, the adaptive control strategy significantly outperforms traditional methods.