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Today's complex processes and plants are vulnerable to different faults, misconfiguration, non-holistic and improper control and management which cause abnormal behavior and might eventually result in poor and sub-optimal operation, dissatisfaction, damage to the plant, to personnel and resources, or even to the environment. To cope with these, adverse condition and critical event prediction plays...
The challenges related to the monitoring, diagnosis and control of a wind farm are presented. First, Wireless Sensors Networks are investigated, from an Internet of Things point of view: the most used and recent routing protocols, and the methods which can secure the network against attacks. As the volume of collected information is very large and diverse, big data processing frameworks needed to...
Wireless Sensor Network (WSN) is an integration of simple sensing, processing, storage and communication technology into cheap miniature sized devices. Distributed WSN is used for ambient intelligence, where tiny senor nodes sense, process and communicate signals to the base station (BS) for smart decision making. Nodes are deployed randomly in any unattended area for monitoring any physical attribute...
This paper investigates the issue of device clustering for fault monitoring in Internet of Things(IoT) device management system. To detect the faulty device quickly, fault monitoring must be conducted regularly and often. Therefore, it is desirable to reduce the communication cost for fault monitoring. Fault recovery is also an important factorin device management system. We model our problem as a...
Inter-turn short circuit faults are the most common stator winding faults in permanent magnet wind generators. Their early detection is vital to avoid subsequent damages which can led to catastrophic machine failures. To accomplish this task stator current signature analysis has been recently proposed for identifying inter-turn faults via a non-invasive, non-destructive and cost effective approach...
The article covers the original method of system-on-chip (SoC) monitoring, as well as its subsystems, during postsilicon or runtime verification using built-in SoC facilities. The method is based on dynamic actualization technique — runtime elaboration of system functional model. In comparison with alternative solutions, proposed method is oriented on long-term monitoring (days, weeks, months), allows...
Condition monitoring and data analysis are key factors to avoid unexpected catastrophic breakdowns and detect incipient failures. Managing of these processes are not easy in complex system which has many inputs/outputs and interdependent relationships. In conventional methods, the condition monitoring is carried out separately and systematically due to the large number of monitoring point. This paper...
Network operators and users may enjoy the benefits of SFSW operation, without any of the drawbacks associated with legacy systems, along with the additional functionality of Micro-OTDR. Reflection Immune Operation - RIO® resolves self-reflection from an open connector and/or other reflectors. Only remote data is transferred into the host equipment.
Electrical power supply interruption due to some temporary faults has been a common problem in residential buildings. This leads to discontinuity of electrical supply to the building. However, power supply continuity is very important, as some of the appliances such as refrigerator, security, aquarium and fire alarm system requires continuous supply to be activated. Generally, when a fault occurs...
Condition monitoring system of hydroelectric generating units is essentially needed to protect the system against sudden failure and fault problems which took place rapidly during the operation. Many hydroelectric generating units are located in remote areas where making regular inspection is difficult and fault development is frequently occurred. Therefore resolve this issue, technical solution is...
This paper focuses on the process of mechanical vibration, analyses the misalignment fault mechanism between coupling and bearing in rotor systems, and summarizes the characteristics of this misalignment fault.
There has been a rapid growth of electronics used inside automobiles today from electronic fuel injection, automatic gear box, anti-lock braking system to telematics and in car infotainment systems which has also led to the development of various automotive diagnostic protocols to ensure good vehicle performance. The diagnostic tester is usually used as External Test Equipment by the service technician...
L'Aquila area has a high topography and complex geological structures, and is covered with thick vegetation and snow in areas of high topography. To monitor the characteristics of crustal deformation in this region before the 2009 L'Aquila earthquake, we apply StaMPS software to analyse 20 descending ASAR images acquired between September 2003 and March 2007 and 39 ascending ASAR images acquired between...
The emergence of the next generation of computational environment, consisting of interoperable public clouds, private clouds and private infrastructures, will provide on-demand ubiquitous virtual resources. The delivery of business services over these ubiquitous virtual resources requires a reexamination of how these services are managed and delivered to assure appropriate levels of service availability,...
NSTX at Princeton Plasma Physics Laboratory (PPPL) requires sophisticated plasma positioning control system for stable plasma operation. TF magnetic coils and PF magnetic coils provide electromagnetic fields to position and shape the plasma vertically and horizontally respectively. NSTX utilizes twenty six coil power supplies to establish and initiate electromagnetic fields through the coil system...
Secure systems are achieved by implementing appropriate controls and policies specified based on appropriate selection of minimum security requirements. Maintaining security for these systems is a major challenge. Systems may encounter threats that may arise due to exploitation of vulnerabilities or due to programming flaws. In this work we address security requirements engineering approaches and...
Condition monitoring and fault diagnosis is the groundwork of condition-based maintenance, and much research has been done about diagnostic algorithm and monitoring manufactures, but less research about diagnostics strategy and management. Plenary diagnostics based on event driven threads of data propagated through successive diagnostic levels is an improving attempt about it. In this approach, abnormities...
Overcurrents on distribution systems include permanent faults, temporary faults and other lower magnitude surges, typically from switching events. The overcurrent environment of the distribution system requires quantification if improvements are to be made in power quality, protection and reliability. New and more complex overcurrent protection products require more exact knowledge of feeder conditions...
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