Data-Driven Models for Gas Turbine Online Diagnosis

Machines

Igor Loboda¹  Iván González Castillo²  Juan Luis Pérez Ruiz³ 

[1] Instituto Politécnico Nacional, Escuela Superior de Ingeniería Mecánica y Eléctrica, Av. Santa Ana, 1000, Mexico City 04430, Mexico;Secretaría de Marina Armada de México, Centro de Mantenimiento Aeronaval del Golfo, Carretera Xalapa—Veracruz, km 6.5, Col. Las Bajadas, Veracruz 91698, Mexico;Unidad de Alta Tecnología-Facultad de Ingeniería, Universidad Nacional Autónoma de México, Fray Antonio de Monroy e Hijar 260, Juriquilla, Queretaro City 76230, Mexico;

关键词: inverse models;    data-driven models;    multilayer perceptron;    polynomials;    GasTurb;   

DOI  :  10.3390/machines9120372

来源: DOAJ

【 摘 要 】

The lack of gas turbine field data, especially faulty engine data, and the complexity of fault embedding into gas turbines on test benches cause difficulties in representing healthy and faulty engines in diagnostic algorithms. Instead, different gas turbine models are often used. The available models fall into two main categories: physics-based and data-driven. Given the models’ importance and necessity, a variety of simulation tools were developed with different levels of complexity, fidelity, accuracy, and computer performance requirements. Physics-based models constitute a diagnostic approach known as Gas Path Analysis (GPA). To compute fault parameters within GPA, this paper proposes to employ a nonlinear data-driven model and the theory of inverse problems. This will drastically simplify gas turbine diagnosis. To choose the best approximation technique of such a novel model, the paper employs polynomials and neural networks. The necessary data were generated in the GasTurb software for turboshaft and turbofan engines. These input data for creating a nonlinear data-driven model of fault parameters cover a total range of operating conditions and of possible performance losses of engine components. Multiple configurations of a multilayer perceptron network and polynomials are evaluated to find the best data-driven model configurations. The best perceptron-based and polynomial models are then compared. The accuracy achieved by the most adequate model variation confirms the viability of simple and accurate models for estimating gas turbine health conditions.

【 授权许可】

Unknown