Low complexity controllers for vibrations damping in drilling systems

Islam Boussaada 1, 2 Hugues Mounier 1, 2 Silviu-Iulian Niculescu 2, 1
1 DISCO - Dynamical Interconnected Systems in COmplex Environments
L2S - Laboratoire des signaux et systèmes, Inria Saclay - Ile de France, SUPELEC, CNRS - Centre National de la Recherche Scientifique : UMR8506
Abstract : In oilwell drillstring systems, vibrations represent an important source of economic losses; drill bit wear, pipes disconnection, borehole disruption and prolonged drilling time, are only a few examples of consequences associated with drilling vibrations. In this paper a control-oriented model of torsional vibrations occurring in rotary drilling process is proposed. More precisely, a wave equations with weak damping term is considered. An appropriate stabilizing controller with a reduced number of parameters is proposed for damping such torsional vibrations. Such a controller allows to further explore the effect of multiple roots with maximal admissible multiplicity for linear neutral system with a single delay. An illustrative example completes the presentation. © 2019 American Automatic Control Council.
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Islam Boussaada, Hugues Mounier, Silviu-Iulian Niculescu. Low complexity controllers for vibrations damping in drilling systems. 2019 American Control Conference, ACC 2019, Jul 2019, Philadelphia, United States. pp.5228-5233. ⟨hal-02328847⟩



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