NEW CRITERION FOR TRENDS DISTINCTION OF BIDIMENTIONAL RETRIEVAL OF REGISTRATION PARAMETERS OF GAS TURBINE ENGINES TECHNICAL STATE

V.F. Mirgorod, N.D. Bagautdinov, I.M. Gvosdeva

Design is executed and application results of methods of two-dimensional trend control conformably to a problem of technical state diagnosing of gas turbine engine during continuous exploitation. Two trend statistics, difference and new two-dimensional HaldAbbe type, which allow to determine the fact of trends distinction in researched time series at a basic hypothesis about presence and identity of trends are offered. For difference statistics property are determined in an analytical mode, and for offered new DR-statistics - by a method of statistical modeling. The example two-dimensional trend control for real data of gas turbine engine operation is presented.

Key words: diagnostics, statistical mode, technical state, trend control.