A discontinuous output feedback controller and velocity observer for nonlinear mechanical systems

  • Authors:
  • B. Xian;M. S. De Queiroz;D. M. Dawson;M. L. Mcintyre

  • Affiliations:
  • Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634-0915, USA;Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803-6413, USA;Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634-0915, USA;Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634-0915, USA

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2004

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Abstract

In this paper, we develop a new discontinuous output feedback tracking controller for a class of uncertain, nonlinear, multi-input/multi-output, mechanical systems whose dynamics are first-order differentiable. A novel filter design and Lyapunov-type stability analysis are used to prove semi-global asymptotic tracking. As a by-product of the proposed framework, we also present the design of a new simple, discontinuous velocity observer that ensures global asymptotic velocity observation.