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.
In this paper a method for recursive Takagi Sugeno fuzzy model identification using weighted recursive least squares with optimal initial condition of the parameters based on particle swarm optimization (PSO) applied to static nonlinear and time-variant delay systems is proposed. For this approach, it is used a priori knowledge of the nonlinearities of interest in the system to improve the quality...
This paper proposes a source localization method based on blind source separation, which can be applied to locate multiple simultaneous acoustic sources in a reverberant environment. The proposed system uses the signals acquired by a set of microphone arrays, applies a blind source localization algorithm to obtain the direction-of-arrival (DOA) of each source-array pair, and combines the results to...
This paper presents a 10 years experience of data driven models for sensor validation applied for petroleum and natural gas industry. Auto-associative kernel regression has been used as the main modeling method. The models achieved were embedded in software called Sentinell, which is used for sensors diagnosis. The software is being used in a natural gas compression station, and it has been evaluated...
The failures of a Li-ion battery can generally be classified into abrupt and gradual fault categories. The abrupt faults which can lead to hazardous situations are usually monitored and avoided. Gradual faults, that can result from battery's aging and degradation, and are best manifested in the battery electrochemical parameters, are however more difficult to monitor and are thus less considered in...
For economic and environmental reasons, wind turbines are becoming a potential renewable power source that could replace conventional fossil-fuelled plants. In remote areas where the power grid is unavailable, these wind plants may be equipped with self-excited induction generators. Order to maximize their productivity, the generators condition has to be continually monitored. For this purpose, many...
Recently, special attention has been devoted to the health monitoring aspect of power electronics devices since it became an essential step to ensure and guarantee the availability of the overall power electronics systems. Dc-link capacitors, despite their type or technology are one of the main devices to monitor since they are responsible of more than 30% of the power electronics equipment breakdowns...
The development of signal processing techniques that allows the estimation of parameters from the power system are crucial to keep the grid within a safe margin of operation. Some methods require a specific sampling rate in order to avoid asynchronous sampling, which may result in errors in estimation algorithms. Due to unbalances between demand and supply, the power signal is time-varying in nature,...
The advent of smart grids have urged a radical reappraisal of distribution networks and power quality requirements, and effective use of the network are indexed as the most important keys for smart grid expansion and deployment regardless. One of the most efficient ways of effective use of these grids would be to continuously monitor their conditions. This allows for early detection of power quality...
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.