The task of fault diagnosis in computer networks is becoming extremely demanding as networks are spreading geographically, and the number of devices and services supported by them are increasing exponentially. In this paper, we present a Network Fault Diagnostic System(NFDS) to diagnose hardware fgaults like link and device failures. The proposed NFDS uses a model-based three-level reasoning ap...

This paper studies the automation of fault management of wireless and mobile networks. A network management protocol similar to SNMP with an integrated architecture using mobile agents will prove effective in fault management of such networks. In view of the above, we design a wireless network management protocol to support fault management. In particular, we use mobile agents to detect, diagno...

Study on the fault diagnosis method through the combination of decision classification algorithms and expert system. The method of extracting diagnosis rules with the CTree software was given, and a fault diagnosis system based on CLIPS was developed. In order to verify the feasibility of the method, at first the sample data was got through the simulations under fault of direct-drive wind turbi...

The lack of robustness in current diagnostic systems is an important research issue because it has two major consequences: inability to diagnose novel faults and inability to diagnose more than one type of fault. This paper describes an approach that formulates diagnosis of physical systems in operation (operative diagnosis) as problem solving in a hypothesis space. Such a formulation increases...

The new memory technologies and processes are introducing defects that cause faults that were unknown previously. One of the new observed faults in real designs are called dynamic faults. The paper gives a mathematical analysis of such a fault class based on the fault primitive concept. The dynamic fault space will be then established; within this space dynamic functional fault models can be st...

Planetary gearboxes are widely used in the drivetrain of helicopters and wind turbines. Any planetary gearbox failure could lead to breakdown of the whole drivetrain and major loss of helicopters and wind turbines. Therefore, planetary gearbox fault diagnosis is an important topic in prognostics and health management (PHM). Planetary gearbox fault diagnosis has been done mostly through vibratio...

Overlay networks have emerged as a powerful and flexible platform for developing new disruptive network applications. The attractive characteristics of overlay networks such as planetary-scale distributions, user-level flexibility (e.g. overlay routing) and manageability bring to overlay fault diagnosis new challenges, which include inaccessible underlying network information, incomplete and in...

In this paper, we address fault-tolerant control for non-linear plants. We perform soft fault detection and isolation for partial fault detection. A new method is proposed that combines model predictive controllers with fuzzy Takagi-Sugeno models. An example is presented to illustrate the functionality of the proposed approach. Keywords— Fault detection and isolation, multiple models, fuzzy Tak...

In this work we describe a diagnostic fault simulator for sequential circuits which evaluates the eeectiveness of a given test set in distinguishing between faults. Diagnostic fault simulation is performed on several IS-CAS89 sequential benchmark circuits using two diier-ent deterministic test sets for each circuit. Several diagnostic measures are reported, including the diagnostic resolution, ...