Fractional order variable-gain super-twisting terminal sliding mode position control
ZHAO Xin-yu
WANG Li-mei
Abstract：In order to improve the position tracking accuracy of permanent magnet linear synchronous motor(PMLSM)servo system,a fractional order variable-gain super-twisting terminal sliding mode control method is proposed in this paper.Firstly,the dynamic equation of system with uncertainty is established.Then,the fractional order constant-gain super-twisting sliding mode control with finite-time convergence is realized by combining the fractional order Riemann-Liouville definition and terminal sliding mode theory.At the same time,in the case of complex system uncertainties,a new variable-gain super-twisting algorithm is designed based on Lyapunov theory,which accurately compensates the uncertain disturbance of the system and effectively improves the robust performance of the system.Finally,the simulation and experimental results show that the proposed method greatly improves the tracking accuracy of the system,weakens the chattering phenomenon,and has strong robustness to external interference.
Keywords：permanent magnet linear synchronous motorfractional order super-twisting controlposition controlro-bustness
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 740-748 )