Design and Development of the Pattern to Assign and Estimate the Reliability of Complicated Systems by Bayesian Network Method, Case Study: A High Technology Camera

Camera is one of the most important types of modern communicational devices which failing on its operation may cause difficulties to achieve its goals. In order to protect camera lens from damages, especially in difficult missions at space, a type of cap called shutter can be put on the lens. Diagnosing all probable failures in such sensitive devices before testing can have a dramatic impact on modification of these systems. On the other hand, calculating of reliability in these systems due to lack of essential data in some cases subjected to some difficulties. Bayesian Network method is a powerful way in calculation of reliability for the mixed systems which can resolve the lack of data. In this paper firstly Functional Flow Block Diagram and the N2 matrix is drawn due to importance of sub-systems which are used in the shutter. Then the reliabilities of the components are computed through the methodology of Feasibility of Objects. In the next step, on the basis of shutter FTA; Bayesian Network is drawn. Finally the reliability of the shutter is calculated.