HGO and neural network based integral sliding mode control for PMSMs with uncertainty

Abstract

This paper proposes an integral sliding mode control that integrates a high-gain observer (HGO) and a radial basis function neural network (RBFNN) for a permanent magnet synchronous motor (PMSM) with uncertainty. Since the second-order motion equation of the PMSM is used to improve the control performance, the speed derivative, which cannot be measured directly, is required. Thus, the HGO is designed to estimate the unknown state (speed derivative). In addition, the RBFNN is designed to approximate the compounded disturbance including the lumped disturbance of system and the HGO error effect. Unlike previous studies, the output of the RBFNN is compensated by both the controller and the HGO to improve the system robustness and observer accuracy. The sliding function and the HGO error are both taken into account in the RBFNN to explicitly guarantee the stability of the whole system. To demonstrate the superiority of the proposed method, comparative simulations and experiments were carried out in different cases.

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Funding

Funding was provided by Fundamental Research Funds for the Central Universities (CN) (xjj2018007).

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Correspondence to Lihui Yang.

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Ge, Y., Yang, L. & Ma, X. HGO and neural network based integral sliding mode control for PMSMs with uncertainty. J. Power Electron. (2020). https://doi.org/10.1007/s43236-020-00111-w

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Keywords

  • Permanent magnet synchronous motor
  • Integral sliding mode control
  • High-gain observer
  • Radial basis function neural network
  • Parameter adaptive algorithm