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Multi-motor position synchronization control method based on non-singular fast terminal sliding mode control.

Chun-Yang Lan1, He Wang1, Xin Deng2

  • 1School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan, China.

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Summary
This summary is machine-generated.

This study introduces a new control method for multi-motor systems, enhancing position synchronization. The Non-Singular Fast Terminal Sliding Mode Control (NFTSMC) with Improved Deviation Coupling Control (IDCC) significantly reduces synchronization errors and improves disturbance rejection.

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Area of Science:

  • Control Systems Engineering
  • Robotics
  • Electrical Engineering

Background:

  • Achieving high-precision position synchronization in multi-motor systems is crucial for complex industrial applications.
  • Existing control methods like SMC, FTSMC, RCC, and DCC face limitations in accuracy and disturbance rejection.

Purpose of the Study:

  • To develop and validate a novel multi-motor position synchronization control method.
  • To enhance the coupling and synchronization performance between multiple motors.
  • To improve the overall control accuracy and robustness against disturbances.

Main Methods:

  • Design of a sliding mode controller using a non-singular fast terminal sliding mode surface for Permanent Magnet Synchronous Motors (PMSMs).
  • Improvement of the deviation coupling structure to enhance inter-motor coupling for precise synchronization.
  • Simulation-based validation of the proposed NFTSMC+IDCC method against traditional SMC, FTSMC, RCC, and DCC.

Main Results:

  • The NFTSMC+IDCC method achieved a total multi-motor position synchronization error of 0.553r.
  • Speed error was reduced by 2.873r compared to SMC and 1.772r compared to FTSMC.
  • Anti-disturbance performance improved by 83.68% over SMC and 76.22% over FTSMC.
  • The improved structure maintained low synchronization errors (0.56r-0.58r) across different speeds, outperforming RCC and DCC.

Conclusions:

  • The proposed NFTSMC+IDCC method significantly improves multi-motor position synchronization performance.
  • The control strategy offers reduced displacement errors and faster convergence after disturbances.
  • This approach enhances overall control system performance and robustness.