AVAILABILITY MODEL OF COMMUNICATION NETWORK IN CONNECTING SHIP SYSTEMS USING OPTICAL FIBRE TECHNOLOGY

Sa？etak For an efficient operation of a ship it is essential that all its systems work properly and reliably. In order to be able to control and monitor the systems, it is necessary to connect all of the systems’ components with a communication network. To ensure effective and reliable connecting of ship systems, all the elements which constitute the optical communication network were analysed, and the elements whish affect the most the overall system’s availability were identified. Based on these studies, a mathematical model of network has been developed. The model includes all the network’s elements, and, based on the failure data; it calculates the input data required for the analysis of network availability. A novel method of calculation has been introduced, which includes the impact factors based on the cable network construction mode. In order to enable the usage of the network model for networks of different topology, size, construction modes and purposes, a novel algorithm for calculating the communication network’s availability has been created. The availabilities of individual components and the whole network have been calculated, the impact of individual components’ availability on the availability of the system has been established, and the methods of communication networks protection have been defined. Based on the conducted researches, the behaviour of the system in the event of failures and the possibility of finding optimal and reliable modes of connecting ship systems have been determined, thus contributing to the overall reliability of ship systems and of a ship as a whole