Multimode identification to obtain an adequate gas turbine engine model for its diagnosing by thermal-gas dynamic parameters

Aeronautical and Space-Rocket Engineering

Thermal engines, electric propulsion and power plants for flying vehicles


DOI: 10.34759/vst-2020-1-133-143

Аuthors

Ahmed H. S.*, Osipov B. M.**

Kazan National Research Technical University named after A.N. Tupolev, 10, Karl Marks str., Kazan, 420111, Russia

*e-mail: hersh_ise19@mail.ru
**e-mail: obm0099@yandex.ru

Abstract

Modern aircraft engines are the most cost intensive, energy consuming and heavily loaded elements of an aircraft, which operate in conditions of both high thermal and power loading to ensure high economic indicators. All this requires special attention to reliability provision in flight. Aircraft engines operation as of assumes organizing technical diagnostics system at the maintenance organization, which is defined as an aggregate of means and an object of diagnostics, and performers, if necessary. This system is prepared to diagnose, or perform it according to the regulation, set by the appropriate documentation. Technical diagnostics (TD) is a division of knowledge studying technical conditions of units under test and revealing technical states, developing techniques of their determining, as well as principles of elaboration and organization of the systems application. The following tasks are related to the main tasks of technical diagnostics:

– technical condition control, which means defining the type of technical condition;

– searching for a place and determining causes of failure and malfunction;

– predicting technical condition, in which an object will appear to be at some future instant in time;

– genesis, i.e. definition of the state condition in which the object was at some point in the past;

– recognition of technical objects states in conditions of limited information to increase reliability and service life of these objects.

The engine mathematical model is of most importance in the technical diagnostics system. Its development presents a problem, since, as a rule, technical documentation does not hold characteristics of the engine units. In this regard, obtaining complete mathematical models of engines for diagnostic purposes is an urgent task. This article proposes an algorithm developed by the authors, and implemented as a computer program.

Keywords:

aircraft gas turbine engine (GTE), technical diagnostics, thermodynamic parameter, mathematical model, multimode identification GTE diagnostics

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