title: Fuzzy model-based observers for fault detection in CSTR.
abstract: Under the vast variety of fuzzy model-based observers reported in the literature, what would be the properone to be used for fault detection in a class of chemical reactor? In this study four fuzzy model-based observers for sensor fault detection of a Continuous Stirred Tank Reactor were designed and compared. The designs include (i) a Luenberger fuzzy observer, (ii) a Luenberger fuzzy observer with sliding modes, (iii) a Walcott-Zak fuzzy observer, and (iv) an Utkin fuzzy observer. A negative, an oscillating fault signal, and a bounded random noise signal with a maximum value of ±0.4 were used to evaluate and compare the performance of the fuzzy observers. The Utkin fuzzy observer showed the best performance under the tested conditions.
authors.affiliation: Facultad de Ingeniería Eléctrica, Universidad Michoacana de San Nicolás de Hidalgo, Morelia Michoacán, Mexico.
authors.forename: Hazael
authors.initials: H
authors.lastname: Ballesteros-Moncada
authors.affiliation: Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Colinas de la Normal, C.P. 44270 Guadalajara, Jalisco, Mexico.
authors.forename: Enrique J
authors.initials: EJ
authors.lastname: Herrera-López
authors.affiliation: Facultad de Ingeniería Eléctrica, Universidad Michoacana de San Nicolás de Hidalgo, Morelia Michoacán, Mexico. Electronic address: janzurez@umich.mx.
authors.forename: Juan
authors.initials: J
authors.lastname: Anzurez-Marín
keywords: CSTR; Chemical process; Fault detection; Fuzzy system; Model-based observer; Takagi–Sugeno