Output feedback based simultaneous stabilization of two Port-controlled Hamiltonian systems with disturbances

Authors

Baozeng Fu, Shihua Li, Xiangyu Wang, Lei Guo

Abstract

In motor system control design, a single controller is usually employed to simultaneously control two or more motors for saving costs, which also achieves the computational simplification of control. In practical Hamiltonian systems control, more systems also need to be stabilized by a single controller under some working conditions. Thus, this paper studies simultaneous stabilization problem of two nonlinear Port-controlled Hamiltonian (PCH) systems with disturbances by a composite controller. Based on the Hamiltonian structure properties, two PCH systems are combined together to generate an augmented PCH system by utilizing output feedbacks firstly. Then, to estimate disturbances effectively, it is essential to design a nonlinear disturbance observer (NDOB) and the estimate is employed to feedforward compensate the effects of disturbances. Next, combining the output feedback part and the disturbance compensation part together, a simultaneous stabilization controller is developed. Subsequently, it is proved that the closed-loop system under the proposed controller is asymptotically stable. Finally, an example with simulations reveals that the proposed method is effective.

Citation

• Journal: Journal of the Franklin Institute
• Year: 2019
• Volume: 356
• Issue: 15
• Pages: 8154–8166
• Publisher: Elsevier BV
• DOI: 10.1016/j.jfranklin.2019.02.039

BibTeX

@article{Fu_2019,
  title={{Output feedback based simultaneous stabilization of two Port-controlled Hamiltonian systems with disturbances}},
  volume={356},
  ISSN={0016-0032},
  DOI={10.1016/j.jfranklin.2019.02.039},
  number={15},
  journal={Journal of the Franklin Institute},
  publisher={Elsevier BV},
  author={Fu, Baozeng and Li, Shihua and Wang, Xiangyu and Guo, Lei},
  year={2019},
  pages={8154--8166}
}

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