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The necessary conditions for the diagnosability of control systems with a complex structure are given. It is shown that the topological conditions for detectability and localization of the fault signal do not depend on the class of operators of the dynamic model of the control system and are checked by using path search algorithms in directed graphs.
In this paper the approach on the base diagnostic models in form of fuzzy graph for fault detections is proposed on example with a Fault-Tolerant Fuel Control System. Scope of research connected with using fuzzy graphs to fault diagnosis is presented. Fuzzy graph is used to describe causal relationships between process variables and faults. Method for finding possible ability to detect and isolate...
In this paper the approach on the base bank of fuzzy diagnostic models for fault detections is proposed on example with coal mill used at a power plant. A model bank is constructed to reproduce behaviour of the normal and fault states. Fuzzy reasoning and basic statistical methods are combined to identify changes in normal model residuals. Fault models are fuzzy rules for describing abnormalities...
The solution of a problem of detection, localization and identification of faults on the basis of DTW-classification is considered. Practical approbation of the developed algorithm of diagnostics is carried out on benchmark model of a ship propulsion system.
This paper presents an approach for development of a diagnostic system on the base of a combination of different methods for fault detection, isolation and identification. The important place is given to algorithms of diagnostics by means of support vector machine (SVM) and fault detection estimator together with bank of fault isolation estimators (FDE-FIE). The idea of this approach is illustrated...
This paper presents an approach for development of a diagnostic system on the base of ANFIS networks for creation of reference models of pneumatic servo-motor actuated control valve in the mode without faults. Detection, localization and identification of faults is carried out on the basis of the analysis of extreme values of residuals. The idea of this approach is illustrated on a practical example...
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