FO improved fast terminal sliding mode control method for permanent‐magnet synchronous motor with FO disturbance observer. Issue 10 (15th May 2019)

• Record Type: Journal Article
• Authors: Wu, Fei; Li, Penghan; Wang, Jie
• Is Part Of: IET control theory & applications. Volume 13:Issue 10(2019)
• Page Start: 1425
• Page End: 1434
• Publication Date: 2019-05-15
• Subjects: permanent magnet motors -- observers -- PI control -- Lyapunov methods -- control system synthesis -- stability -- synchronous motors -- variable structure systems -- machine control; FO improved fast terminal sliding mode control method -- FO disturbance observer -- fractional‐order improved fast terminal sliding mode controller -- permanent‐magnet synchronous motor speed regulation system -- FO proportional–integral controller -- FO model -- speed output -- mode surface -- novel FO terminal -- speed loop -- speed tracking performance -- speed reach reference value -- control time -- integer‐order sliding mode controller -- convergence speed -- control law -- high control performance -- composite FO controller -- reference q‐axis current -- IO sliding mode controller -- disturbance‐rejection ability -- controller design; Control theory -- Periodicals; Automatic control -- Periodicals; 629.8312
• DOI: 10.1049/iet-cta.2018.5348
• Languages: English
• ISSNs: 1751-8644

Abstract

Abstract : This study proposes a fractional‐order (FO) improved fast terminal sliding mode controller for permanent‐magnet synchronous motor speed regulation system. By designing an FO proportional–integral controller for current loops, an FO model between reference q ‐axis current and speed output is proposed. By introducing an FO terminal sliding mode surface, a novel FO terminal sliding mode controller is designed for speed loop to improve the speed tracking performance. The proposed FO controller can make speed reach reference value in finite time. Moreover, it is proved that the control time of the FO sliding mode controller is shorter than integer‐order (IO) sliding mode controller. To further enhance the convergence speed, the fast terminal sliding mode control method is used. Meanwhile, FO disturbance observer is utilised to enhance the disturbance‐rejection ability. The control law of the proposed controller is designed according to Lyapunov stability theorem. Finally, Simulation and experimental results demonstrate the effectiveness, high control performance and high disturbance‐rejection ability of the proposed composite FO controller in comparison with IO controller.