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Robust Position Control of a Two-Sided 1-DoF Impacting Mechanical Oscillator Subject to an External Persistent Disturbance by Means of a State-Feedback Controller

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  • Firas Turki
  • Hassène Gritli
  • Safya Belghith

Abstract

This paper proposes a state-feedback controller using the linear matrix inequality (LMI) approach for the robust position control of a 1-DoF, periodically forced, impact mechanical oscillator subject to asymmetric two-sided rigid end-stops. The periodic forcing input is considered as a persistent external disturbance. The motion of the impacting oscillator is modeled by an impulsive hybrid dynamics. Thus, the control problem of the impact oscillator is recast as a problem of the robust control of such disturbed impulsive hybrid system. To synthesize stability conditions, we introduce the S-procedure and the Finsler lemmas by only considering the region within which the state evolves. We show that the stability conditions are first expressed in terms of bilinear matrix inequalities (BMIs). Using some technical lemmas, we convert these BMIs into LMIs. Finally, some numerical results and simulations are given. We show the effectiveness of the designed state-feedback controller in the robust stabilization of the position of the impact mechanical oscillator under the disturbance.

Suggested Citation

  • Firas Turki & Hassène Gritli & Safya Belghith, 2019. "Robust Position Control of a Two-Sided 1-DoF Impacting Mechanical Oscillator Subject to an External Persistent Disturbance by Means of a State-Feedback Controller," Complexity, Hindawi, vol. 2019, pages 1-14, December.
    • Handle: RePEc:hin:complx:9174284
    DOI: 10.1155/2019/9174284
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    References listed on IDEAS

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    1. de Souza, Silvio L.T. & Caldas, Iberê L. & Viana, Ricardo L., 2007. "Damping control law for a chaotic impact oscillator," Chaos, Solitons & Fractals, Elsevier, vol. 32(2), pages 745-750.
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