Structure discrimination in block-oriented models using linear approximations: A theoretic framework

• Autores: Johan Schoukens, Rik Pintelon, Yves Rolain, Maarten Schoukens
• Localización: Automatica: A journal of IFAC the International Federation of Automatic Control, ISSN 0005-1098, Vol. 53, 2015, págs. 225-234
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • In this paper we show that it is possible to retrieve structural information about complex block-oriented nonlinear systems, starting from linear approximations of the nonlinear system around different setpoints. The key idea is to monitor the movements of the poles and zeros of the linearized models and to reduce the number of candidate models on the basis of these observations. Besides the well known open loop single branch Wiener-, Hammerstein-, and Wiener–Hammerstein systems, we also cover a number of more general structures like parallel (multi branch) Wiener–Hammerstein models, and closed loop block oriented models, including linear fractional representation (LFR) models.