Parity space-based fault detection for linear discrete time-varying systems with unknown input

• Maiying Zhong ^[1] ; Yang Song ^[1] ; Steven Ding ^[2]
  1. [1] Beihang University

     Beihang University

     China

     
  2. [2] University of Duisburg-Essen

     University of Duisburg-Essen

     Kreisfreie Stadt Essen, Alemania

     
• Localización: Automatica: A journal of IFAC the International Federation of Automatic Control, ISSN 0005-1098, Vol. 59, 2015, págs. 120-126
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • In this paper, a new approach to parity space-based fault detection (FD) is put forward for linear discrete time-varying (LDTV) systems. The focus of our study is on solving the problem with heavy online computational burden. The main contributions are two folds. Firstly, the problem of parity space-based FD is formulated as finding a minimum of quadratic form of unknown input. Secondly, by applying projection in Krein space, a solution of optimal parity space-based FD is obtained via recursively computing innovations. It is shown that the reduction of computation cost is achievable, especially with the increase of parity space order. Finally, a numerical example is given to demonstrate the application of the proposed method.