Аннотация
Object of the research and modeling are the main columns of catalytic reforming unit of Atyrau Oil Refinery (AOR) that are operated under conditions of deficiency and inaccuracy of initial information. System of mathematical models of the columns being researched is developed on the basis of statistical and indistinct information. Structures of mathematical models of columns K-1, K-2 and K-3 are identified in the form of the regression and fuzzy regression equations, i.e. combined models of main columns of Leningrad-Germany (LG) catalytic reforming unit are composed.