Brief paper: Interval observer design for consistency checks of nonlinear continuous-time systems

  • Authors:
  • Tarek Raïssi;Gaétan Videau;Ali Zolghadri

  • Affiliations:
  • University of Bordeaux, IMS-lab, Automatic Control Group, 351 cours de la libération, 33405 Talence, France;University of Bordeaux, IMS-lab, Automatic Control Group, 351 cours de la libération, 33405 Talence, France;University of Bordeaux, IMS-lab, Automatic Control Group, 351 cours de la libération, 33405 Talence, France

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2010

Quantified Score

Hi-index 22.15

Visualization

Abstract

This paper deals with fault detection for nonlinear continuous-time systems. A procedure based on interval analysis is proposed to build a guaranteed qLPV (quasi-Linear Parameter-Varying) approximation of the nonlinear model. The interval qLPV approximation makes it possible to derive two point observers which estimate respectively the lower and the upper bound of the state vector using cooperativity theory. A set guaranteed to contain the actual value of the residual is then designed. The modelling uncertainties and measurement errors are taken into account at the design stage. The proposed methodology is illustrated through numerical simulations.