Abstract For dynamic systems, fault detection and diagnosis involve the observation of vibration signals. Faults associated with hydrodynamic bearings are one most common causes forced shutdowns in rotating machinery. If it is a wear fault, bearing clearance affected changing system characteristics. Therefore, time response machine subjected to worn analysed observe behaviour presence wear. Spe...

Safety-critical embedded systems often operate in harsh environmental conditions that necessitate fault-tolerant computing techniques. Many safety-critical systems also execute realtime applications. The correctness of these systems depends not only on the logical result of computation, but also on the time at which the results are produced. The missing of task deadlines can therefore be viewed...

This effort presents a fault-tolerant LAN architecture for Mobile Mission Critical Systems (MMCS’s). MMCS’s are real-time computing platforms that perform continuously in harsh environments. It is desirable that they continue to perform a subset of critical tasks under fault conditions. The network in a MMCS can be characterized as an isolated, real-time, device-control network. A key considera...

Distributed real-time and embedded (DRE) systems often require support for multiple simultaneous quality of service (QoS) properties, such as real-timeliness and fault tolerance, that operate within resource constrained environments. These resource constraints motivate the need for a lightweight middleware infrastructure, while the need for simultaneous QoS properties require the middleware to ...

Enhancement of fault ride-through (FRT) capability and subsequent improvement of rotor speed stability of wind farms equipped with doubly fed induction generator (DFIG) is the objective of this paper. The objective is achieved by employing a novel FRT scheme with suitable control strategy. The proposed FRT scheme, which is connected between the rotor circuit and dc link capacitor in parallel wi...

A safety-critical real-time computer system must provide its services with a dependability that is much better than the dependability of any one of its constituent components. This challenging goal can only be achieved by the provision of fault tolerance. The design of any faulttolerant system proceeds in four distinct phases. In the first phase the fault hypothesis is shaped, i.e. assumptions ...

Runtime verification (RV) is a natural fit for ultra-critical systems, where correctness is imperative. In ultra-critical systems, even if the software is fault-free, because of the inherent unreliability of commodity hardware and the adversity of operational environments, processing units (and their hosted software) are replicated, and fault-tolerant algorithms are used to compare the outputs....

Time Petri Nets are a suitable tool for the modeling of timed Discrete Event Systems. This paper is about diagnosability single fault in Nets. To check existence critical pairs, an abstraction systems infinite behaviours, called path, presented as set observable constraints associated with particular sequence transitions. Properties on solutions partition this then provided to fault.

For economic reasons, a new trend in the development of distributed hard real-time systems is to rely on the use of CommercialO -The-Shelf (cots) hardware and operating systems. As such systems often support critical applications, they must comply with stringent realtime and fault-tolerance requirements. The use of cots components in distributed critical systems is subject to two fundamental qu...