The faulty performance of permanent-magnet (PM) brushless dc motor drives is studied under one and simultaneous two open-switches faults conditions. This DC motor is supplied with a three phase two level six IGBT voltage source inverter. The three phases currents mean values of the DC motor are used as diagnostic indices. A knowledge algorithm is based to get information on which IGBT is in ope...

This paper investigates decentralized sliding mode control (SMC) of multi-agent cooperative systems when the inter-agent communication delay cannot be neglected. A new algorithm is proposed to control and maintain the cooperation objectives when large communication delays occur due to faulty network conditions. The faulty agents perform prediction of all other agents in order to perform decentr...

Analyzing the dynamic faulty behavior in DRAMs is a severely time consuming task, because of the exponential growth of the analysis time needed with each memory operation added to the sensitizing operation sequence of the fault. In this paper, a new fault analysis approach for DRAM cell defects is presented where the total infinite space of dynamic faulty behavior can be approximated within a l...

This paper is about fault detection and isolation for discrete event systems modeled with Petri nets. Faults are represented with failure transitions and a faulty behaviour occurs when a sequence of transitions is fired that contains at least one failure transition. The main contribution is to provide necessary and sufficient conditions to be satisfied by a given set of observable places for im...

A new method of splicing high voltage conductors has been making its way into the electrical utility industry, displacing the conventional method at an ever-increasing pace. While conventional technology uses a hydraulic compression process, this new method uses implosive energy to make the splice. This paper describes the basic principals behind this new technology and compares the implosive m...

Mechanical imbalances are common mechanical faults in induction motors. Vibration monitoring techniques have been widely used for the diagnosis of mechanical faults in induction motors, but electrical detection methods have been preferred in recent years. For many years, researchers have concentrated on the Motor Current Signature Analysis (MCSA). This paper examines the effect of mechanical im...

In this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. The engines are assumed to be implemented as composite web services. Current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. The difficulty is to rollback the execution state of the workflo...