The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Operational dependencies often exist between the configuration of a multi-state system and the states of its components. In this paper, we analyse, within a Monte Carlo simulation framework, the effect that such operational dependencies may have on the availability behaviour of a multi-state system.
Fully Electric Vehicles (FEVs) for mass production present new challenges for automotive manufacturers. In particular, the relative immaturity of new building blocks such as motors and control components may have an impact on the safety and reliability of FEVs. In this context, one of the main objectives of the European FP7 Electrical Powertrain Health Monitoring for Increased Safety of FEVs (HEMIS)...
A particle filtering method is implemented within a log-likelihood ratio approach here specifically tailored to handle hybrid dynamic systems, i.e, systems characterized by transitions among discrete modes of operation and failure, each one giving rise to a specific continuous dynamics of evolution. An application to a case study of literature proves the capabilities of the newly devised algorithm.
In the present work, the Neural Networks (NNs) are used to reconstruct the interaction point of an event producing a signal shared among different photodetector in a conventional Anger Camera. The event is caused by the interaction of a medium-high energy gamma ray within a scintillator crystal coupled with Silicon Drift Detectors (SDDs). Two different energy ranges are considered for the incident...
A novel approach is proposed for modeling the degradation mechanisms affecting components of electrical production plants. The aim is to characterize the actual living conditions in which the component works and, on this basis, to estimate its Time To Failure. The underlying motivation is to include useful component-specific information for establishing effective management strategies capable of optimally...
This paper describes the activities of the Project Group on Maintenance Modelling and Applications, set up as a joint venture between ESReDA and ESRA to gather the state of knowledge and provide the perspectives on the future in the field. The Project started in 2007; the conclusion of the activities is planned for 2010. The technical findings and recommendations will be published in a technical report...
The main goal of a prognostic system is to estimate the Time To Failure (TTF) of a structure, system or component (SSC), i.e. the lifetime remaining between the present and the instance when it can no longer perform its function. Such prediction on the time of loss of functionality is typically done on the basis of measurements of parameters representative of the SSC condition state and degradation...
This paper extends previous works developed for evaluating the security characteristics of a network system (e.g. for water supply, electric power or gas distribution) exposed to a terrorist "attack", by taking into account simultaneously several characteristics. Given a source node where the hazard is injected, two criteria are used to assess the vulnerability of the network: the time to...
The proposed work regards the reliability and availability assessment of repairable distribution systems by a Monte Carlo simulation approach. The main idea is to build a model to simulate the stochastic behaviour of an electric distribution system in which the components have both faulty and operational states. The possibility of restoration is also considered. The simulation is performed via an...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.