Adaptive EPCH strategy for nonlinear systems with parameters uncertainty and disturbances

Authors

Xiangxiang Meng, Haisheng Yu, Jie Zhang, Qing Yang

Abstract

This article address a novel adaptive error port controlled Hamiltonian scheme for nonlinear systems with parameters uncertainty and external disturbances. Considering the input saturation phenomenon in real complex systems, a new smooth saturation function is used to deal with the limitations between the control signal and the actuator. The adaptive control technique is introduced to resolve the influence of model parameters uncertainty, and the nonlinear disturbance observer (NDO) is utilized to address external disturbances in real complex systems. Furthermore, a novel NDO-based adaptive error port controlled Hamiltonian (EPCH-NDO) strategy with the smooth switching gain optimization control technique is presented to enhance the accuracy of position tracking control for the target. Finally, the permanent magnet synchronous motor system is adopted to verify the proposed scheme. A large amounts of experiment results indicate that the proposed adaptive EPCH-NDO control strategy has perfect control performances compared with PI and port-controlled Hamiltonian based on load torque estimator methods.

Keywords

Input saturation; Parameters uncertainty and disturbances; EPCH; Adaptive control; NDO; PMSM system

Citation

• Journal: Nonlinear Dynamics
• Year: 2023
• Volume: 111
• Issue: 8
• Pages: 7511–7524
• Publisher: Springer Science and Business Media LLC
• DOI: 10.1007/s11071-023-08243-x

BibTeX

@article{Meng_2023,
  title={{Adaptive EPCH strategy for nonlinear systems with parameters uncertainty and disturbances}},
  volume={111},
  ISSN={1573-269X},
  DOI={10.1007/s11071-023-08243-x},
  number={8},
  journal={Nonlinear Dynamics},
  publisher={Springer Science and Business Media LLC},
  author={Meng, Xiangxiang and Yu, Haisheng and Zhang, Jie and Yang, Qing},
  year={2023},
  pages={7511--7524}
}

Download the bib file

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