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.
A novel multilevel inverter topology with reduced number of power switches is proposed. This new topology is based on a combination of conventional diode clamped and H-bridge topologies. The proposed idea has been validated through simulation results.
(GNSS) Global Navigation Satellite System is the rising technology of times to come, which has a lot of challenges for its precision and errors. The main contributor in the GNSS signal error is the ionosphere in which the GNSS signal is badly affected by Ionospheric layers containing different amount of TEC. The F layer of the ionosphere is more dominant particularly the F2 layer which is present...
These proceedings contain the papers presented at the 2014 NASA/ESA Conference on Adaptive Hardware and Systems (AHS-2014), held at University of Leicester, Leicester, United Kingdom, on 14–18 July 2014. The purpose of the AHS 2014 conference is to bring together leading researchers from the adaptive hardware and systems community to exchange experiences and share new ideas in the field.
In this paper a novel distributed architecture for system level Fault Detection, Isolation and Recovery (FDIR) aimed at spacecraft applications is presented. The architecture reconfigures itself in the case of a failure for seamless adaptability and operation. Two new algorithms for detection of Silent Data Corruption (SDC) errors are proposed. A selective redundancy method is employed for transient...
In this paper, a novel design of a satellite Fault-Tolerant Distributed On-Board Computer (FTD-OBC) is proposed. The FTD-OBC fault-tolerance and task migration functions rely on a distributed coordination method, which is supported by an Adaptive Middleware for Fault-Tolerance (AMFT) block. The proposed distributed computer is adaptive and reconfigures itself in case of a failure seamlessly by migrating...
This paper is concerned with increasing the reliability with respect to debris impact of computing systems on board satellites using Fault Tolerant Distributed Computing. A novel adaptive middleware for fault-tolerance (AMFT) design is presented. The middleware performs failure detection, isolation and recovery and synchronizes the operation of a distributed On-Board Computer (OBC) system. If one...
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.