The reliability study is the most important part of engineering design process, as it basis analysis and assessment future product performance in exploitation. Since cannot be predicted with absolute certainty, application theory includes probability unreliability modeling. proposed approach has been applied to assess gear planetary power transmissions. system was determined on block diagram me...

(a) For our first diagram, let’s consider the difference equation used to compute Fibonacci numbers: x(t) = x(t − 1)+ x(t − 2). By looking at this equation, we can see that the output at time t is the sum of the output of the previous two time steps. Therefore, we can write this equation as a block diagram using delay elements and a summation element. Draw the block diagram. (b) Now, let’s cons...

We propose an algebraic approach to block diagram construction as an alternative to the classical graph approach inspired by dataflow models. This block diagram algebra is based on three binary operations : sequential, parallel and recursive constructions. These operations can be seen as high level connection schemes that set several connections at once in order to combine two block diagrams to...

We first note that block diagrams have been important for the learning of GPSS and have been used in most GPSS text books. The full value of block diagrams is obtained first when they can be automatically generated from program code and that block diagrams in turn can generate code. The computer generation of block diagrams requires, however, very exact rules for the block diagrams. This is lac...

This paper describes a formal framework for reliability assessment of component-based systems with respect to specific missions. A mission comprises of different timed mission stages, with each stage requiring a number of highlevel functions. The work presented here describes a modeling language to capture the functional decomposition and missions of a system. The components and their alternati...

Traditional Modeling Methods for High-Availability-Systems like Fault Trees (FT) or Reliability Block Diagrams (RBD) assume that there are no stochastic dependencies between the failure and repair behavior of the system’s components (see e.g. [3]). For instance, they imply that the unavailability of a parallel system can be calculated using the formula ∏n i=1 Ui where U1,2,...n are the unavaila...

The main effort of the present study is to analyze the availability and reliability of a high-performance linac (linear accelerator) conceived for Accelerator-Driven Systems (ADS) purpose and to suggest recommendations, in order both to meet the high operability goals and to satisfy the safety requirements dictated by the reactor system. Reliability Block Diagrams (RBD) approach has been consid...

This article describes the novel stochastic modeling tool OpenSESAME which allows for a quantitative evaluation of fault-tolerant High-Availability systems. The input models are traditional reliability block diagrams (RBD) which can be enriched with inter-component dependencies like failure propagation, failures with a common cause, different redundancy types, and non-dedicated repair. OpenSESA...

Due to the fact that automation can significantly improve reliability of substation as well as distribution system, this paper presents a composite reliability assessment model of distribution system which illustrates the impacts of substations automated by various automation configurations on the reliability of primary distribution systems equipped with a specific distribution automation (DA) ...