Output feedback stabilization of nonlinear dual-rate sampled-data systems via an approximate discrete-time model

Ustunturk A.

AUTOMATICA, vol.48, no.8, pp.1796-1802, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 8
  • Publication Date: 2012
  • Doi Number: 10.1016/j.automatica.2012.05.044
  • Journal Name: AUTOMATICA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1796-1802
  • Keywords: Controller design, Output feedback, Stabilization, Sampled data, Nonlinear, Dual rate, TO-STATE STABILIZATION, FRAMEWORK, STABILITY
  • Middle East Technical University Affiliated: Yes

Abstract

The problem of output feedback stabilization of nonlinear sampled-data control systems is considered under the low measurement rate constraint. A dual-rate control scheme is proposed that utilizes a numerical integration scheme to approximately predict the missing output values between measured output samples. It is shown that if an observer-based output feedback controller that semiglobally practically asymptotically (SPA) stabilizes the single-rate sampled-data plant model is given, then the SPA stability property will be preserved for the closed-loop dual-rate sampled-data system, on the basis of the proposed dual-rate control scheme under standard assumptions. A numerical example is given to illustrate the design method. (C) 2012 Elsevier Ltd. All rights reserved.