Next Article in Journal
Response Identification in the Extremely Low Frequency Region of an Electret Condenser Microphone
Previous Article in Journal
Study and Application of Acoustic Emission Testing in Fault Diagnosis of Low-Speed Heavy-Duty Gears
Article Menu

Export Article

Open AccessArticle
Sensors 2011, 11(1), 612-622;

Simplified Interval Observer Scheme: A New Approach for Fault Diagnosis in Instruments

Instituto Tecnológico de Orizaba, División de Estudios de Posgrado e Investigación, Av. Oriente 9 No. 852, Col. Emiliano Zapata, 94320 Orizaba, Veracruz, Mexico
Centro Nacional de Investigación y Desarrollo Tecnológico, Departamento de Ingeniería Electrónica, Interior Internado de Palmira s/n, 69490 Cuernavaca, Morelos, Mexico
Author to whom correspondence should be addressed.
Received: 25 November 2010 / Revised: 1 January 2011 / Accepted: 5 January 2010 / Published: 10 January 2011
Full-Text   |   PDF [376 KB, uploaded 21 June 2014]   |  


There are different schemes based on observers to detect and isolate faults in dynamic processes. In the case of fault diagnosis in instruments (FDI) there are different diagnosis schemes based on the number of observers: the Simplified Observer Scheme (SOS) only requires one observer, uses all the inputs and only one output, detecting faults in one detector; the Dedicated Observer Scheme (DOS), which again uses all the inputs and just one output, but this time there is a bank of observers capable of locating multiple faults in sensors, and the Generalized Observer Scheme (GOS) which involves a reduced bank of observers, where each observer uses all the inputs and m-1 outputs, and allows the localization of unique faults. This work proposes a new scheme named Simplified Interval Observer SIOS-FDI, which does not requires the measurement of any input and just with just one output allows the detection of unique faults in sensors and because it does not require any input, it simplifies in an important way the diagnosis of faults in processes in which it is difficult to measure all the inputs, as in the case of biologic reactors. View Full-Text
Keywords: ADM1; interval observer; UASB reactor   ADM1; interval observer; UASB reactor  

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Martínez-Sibaja, A.; Astorga-Zaragoza, C.M.; Alvarado-Lassman, A.; Posada-Gómez, R.; Aguila-Rodríguez, G.; Rodríguez-Jarquin, J.P.; Adam-Medina, M. Simplified Interval Observer Scheme: A New Approach for Fault Diagnosis in Instruments. Sensors 2011, 11, 612-622.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top