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The comparison of fault distinguishability approaches – case study

Kościelny J. M., Bartyś M., Rostek K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2019

Vol. 67, nr 6

1059--1068

A comprehensive characterization of four selected fault distinguishability methods is presented herein. All considered methods are derived from structural residual approaches referring to mdel-based diagnostics. In particular, these methods, are based on binary diagnostic matric, foult isolation system, sequences of symptoms, and their combination. fault distinguishability issues are discussed based on an example of four pressure vessels system. Substantian benefit are shown in fault distinguishability figures obtained by utilising extended knowledge regarding foult-symptom relation. Finally, the values of three fault distinguishability metrix are calculated for each method. For the case study, the highest score is achived using the multivalued foult isolation method combined with a diagnosis utilising information regarding the antecedence of symptoms.

Double fault distinguishability in linear systems

Kościelny J. M., Łabęda-Grudziak Z. M.

International Journal of Applied Mathematics and Computer Science

2013

Vol. 23, no. 2

395--406

This paper develops a new approach to double fault isolation in linear systems with the aid of directional residuals. The method of residual generation for computational as well as internal forms is applied. Isolation of double faults is based on the investigation of the coplanarity of the residual vector with the planes defined by the individual pairs of directional fault vectors. Additionally, the method of designing secondary residuals, which are structured and directional, is proposed. These transformations allow achieving various isolation properties. It is shown that double fault distinguishability can be improved by decomposing the observed residual vector along the response directions. The described methods are illustrated with a simple computational example.

Rozróżnialność uszkodzeń w układach liniowych

Kościelny J.M., Dziembowski B.

Diagnostyka

2006

nr 2(38)

93-100

W referacie przedstawiono różne metody zapisu związku między uszkodzeniami i wartościami sygnałów diagnostycznych dla obiektów diagnozowania opisywanych modelami liniowymi. Przeprowadzono analizę porównawczą rozróżnialności uszkodzeń uzyskiwanej z zastosowaniem prezentowanych metod. Omówiono nową metodę zwiększania rozróżnialności uszkodzeń bazującą na sekwencji pojawiających się symptomów. Przedyskutowano zalety i ograniczenia poszczególnych metod.

Different methods of describing relations between faults and values of diagnostic signals for systems with linear models are presented in this paper. Realize there comparative analysis of faults distinguishability using presented methods. Talk over new method of fault's distinguishability increase based on sequence of emerge symptoms. Discuss advantages and constraint each presented methods.