Adaptive nonsingular terminal sliding mode controller for PMSM drive system using modified extended state observer

Ying Shi; Keqi Mei; Ying Shi; Keqi Mei

doi:10.3934/mbe.2023832

Mathematical Biosciences and Engineering

2023, Volume 20, Issue 10: 18774-18791. doi: 10.3934/mbe.2023832

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Adaptive nonsingular terminal sliding mode controller for PMSM drive system using modified extended state observer

Ying Shi ^{1
,
,},
Keqi Mei ²

1.
School of Electronic and Optical Engineering, Nanjing University of Science and Technology Zijin College, Nanjing 210023, China
2.
School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China

Academic Editor: Xiaodi Li

Received: 05 August 2023 Revised: 29 August 2023 Accepted: 24 September 2023 Published: 09 October 2023

In this study, a novel adaptive nonsingular terminal sliding mode (ANTSM) control frame combined with a modified extended state observer (MESO) is presented to enhance the anti-interference performance of the permanent magnet synchronous motor (PMSM) system. In the face of time-varying disturbances with unknown upper bounds, traditional nonsingular terminal sliding mode (NTSM) controllers typically utilize the large control gain to counteract the total disturbance, which will cause unsatisfactory control performances. To address this tough issue, an ANTSM control technique was constructed for the PMSM system by tuning the control gain automatically without overestimation. On this basis, the MESO was adopted to estimate the unknown total disturbance, whose estimation was offset to the ANTSM control input. By applying finite-time techniques, the estimation error will finite-time converge to zero. The proposed MESO has a more rapid estimation speed than the traditional extended state observer (ESO). Finally, the validity of the ANTSM + ESO composite control algorithm is confirmed by comprehensive experiments.
- PMSM,
- disturbance observer,
- terminal sliding mode,
- composite control,
- adaptive law
Citation: Ying Shi, Keqi Mei. Adaptive nonsingular terminal sliding mode controller for PMSM drive system using modified extended state observer[J]. Mathematical Biosciences and Engineering, 2023, 20(10): 18774-18791. doi: 10.3934/mbe.2023832

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Abstract

In this study, a novel adaptive nonsingular terminal sliding mode (ANTSM) control frame combined with a modified extended state observer (MESO) is presented to enhance the anti-interference performance of the permanent magnet synchronous motor (PMSM) system. In the face of time-varying disturbances with unknown upper bounds, traditional nonsingular terminal sliding mode (NTSM) controllers typically utilize the large control gain to counteract the total disturbance, which will cause unsatisfactory control performances. To address this tough issue, an ANTSM control technique was constructed for the PMSM system by tuning the control gain automatically without overestimation. On this basis, the MESO was adopted to estimate the unknown total disturbance, whose estimation was offset to the ANTSM control input. By applying finite-time techniques, the estimation error will finite-time converge to zero. The proposed MESO has a more rapid estimation speed than the traditional extended state observer (ESO). Finally, the validity of the ANTSM + ESO composite control algorithm is confirmed by comprehensive experiments.

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