The trajectory tracking problem for an unmanned four-rotor system: Flatness-based approach

Carlos Aguilar-Ibáñez, Hebertt Sira-Ramírez, Miguel S. Suárez-Castañón, Edgar Martínez-Navarro, Marco A. Moreno-Armendariz

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

In this article we present a flatness-based controller that solves the trajectory tracking problem for an unmanned four-rotor aircraft. A simple version of the dynamical system obtained from a suitable coordinate transformation of the Euler-Lagrange model of the system is used. This model, combined with a suitable input saturation nonlinearity, also avoids the inconvenient system singularities. The corresponding tracking error is shown to be globally asymptotically stable but only locally exponentially stable, while the controller maintains the four-rotor system motions inside a feasible region. Numerical simulations are presented to assesses the effectiveness of the proposed control strategy.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalInternational Journal of Control
Volume85
Issue number1
DOIs
StatePublished - 1 Jan 2012

Keywords

  • flatness approach
  • quadrotor system
  • tracking trajectory planning

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