Scientific paper ID 1683 : 2018/3

The modeling of the reliable behavior of complete complex technical objects is in principle a difficult problem solving largely due to the considerable diversity of physical factors and processes, which affect the reliability of the objects. This report explores the possibilities for reliable modeling of complex technical systems by building a graph. In particular, the completing system ”Coupling part” of a lathe metal-cutting machine with a digital program control small size, domestic production is considered. Based on the collected statistical information on emerging failures in conditions of real exploitation specific factors and processes that alter the level of operational reliability and operational efficiency of the system under study are identified. A pre-formulated classification of these factors and processes is used for this purpose. On the basis of the actually occurring failures information weighting coefficients of said factors and processes are also determined. The factors and processes that affect the reliability of the complex system under study ”Coupling part” , are divided into three groups:

- conditioned by external factors, including man,

- conditioned by mutual influence of the assembly systems,

- conditioned by factors that are internal to the system.