Fault Tree Analysis (FTA) is a dependability analysis technique that has been widely used to predict reliability, availability and safety of many complex engineering systems. Traditionally, these FTAbased analyses are done using paper-and-pencil proof methods or computer simulations, which cannot ascertain absolute correctness due to their inherent limitations. As a complementary approach, we p...

Background Fault tree analysis (FTA) is a well established method for qualitative as well as probabilistic reliability and safety analysis. Fault trees are Boolean models and thus do not support modelling of dynamic effects like sequence dependencies between fault events. In order to overcome this limitations, dynamic fault tree methods were defined previously. Most of these are based on comple...

In the present study, a methodology for determining the factors affecting fuel consumption variation in tractors is proposed using the Fault Tree Analysis (FTA) technique. The mechanical system of a rear traction tractor is modeled and the parameters responsible for the tractor performance are emphasized. From the definition of such parameters (for example: rear weight dynamic, slip, dynamic we...

Fault tree analysis (FTA) is a standardised technique used by engineers to explore possible failure states of safety-critical systems. Since the FTA is generally practised informally and thus, it cannot be guaranteed that it is applied correctly, several formal approaches have been introduced in the past (e.g. [STR02]) for allowing engineers to verify that they built a fault tree considering th...

Multiple battery charging systems can be configured with various combinations of ac-dc and dc-dc converters. This paper reviews the reliability economy three representative configurations multi-battery systems. Existing PSA (part stress analysis) analyse failure rate considering environmental factors for type parts, number connection state parts voltage current parts. However, since it does not...

Being one of the most expensive components of an electrical power plant, the failures of a power transformer can result in serious power system issues. So fault diagnosis for power transformer is highly important to ensure an uninterrupted power supply. Due to information transmission mistakes as well as arisen errors while processing data in surveying and monitoring state information of transf...

Safety is increasingly important for software based, critical systems. Fault tree analysis (FTA) is a safety technique from engineering, developed for analyzing and assessing system safety by uncovering safety flaws and weaknesses of the system. The main drawback of this analysis technique is, that it is based on informal grounds, so safety flaws may be overlooked. This is an issue, where forma...

The positioning system based on satellite navigation can meet the requirements of CTCS-4 train control, improve transportation efficiency, reduce operation and maintenance costs, which is trend in future, security risk assessment great significance to future application this system. In paper, combined with self-developed navigation, an improved fault tree-interval analytic hierarchy process (FT...

Classical Fault Tree Analysis (FTA) can determine the effects of combinations of failure events on a system but cannot capture the potentially critical significance of the temporal ordering of events. In this paper, we propose a temporal extension based on the use of Priority-AND gates to allow relative temporal ordering and temporal analysis in FTA. The classical notion of minimal cut-sets is ...