Nonlinear Modelling and Validation of an Aircraft Gas Turbine Engine
نویسندگان
چکیده
In this paper the orthogonal estimation algorithm is used to estimate a NARMAX model for an aircraft gas turbine. The performance of the model is validated using a range of small and large signal tests and by examining the model’s static and dynamic characteristics. The NARMAX representation allows the direct mapping to the frequency domain by computing the Higher Order Frequency Response Functions (HOFRF) thus allowing physical interpretation to be made. Copyright © 2001 IFAC
منابع مشابه
Global Nonlinear Modelling of Gas Turbine Dynamics Using Narmax Structures
This paper examines the estimation of a global nonlinear gas turbine model using NARMAX techniques. Linear models estimated on small-signal data are first examined and the need for a global nonlinear model is established. A nonparametric analysis of the engine nonlinearity is then performed in the time and frequency domains. The information obtained from the linear modelling and nonlinear analy...
متن کاملStress Analysis of FGM Rotating Disk Subjected to Mechanical and Thermal Loads In Aircraft Gas Turbine Engine
Pursuant to the high usage of rotating the disk in aircraft gas turbine engine, turbo pumps in oil and gas industries, steam and gas turbines in power plants, marine gas turbine and other industrial rotary machines designing and getting under the mechanical and thermal loading casued this design and analysis to be as a special significance. These disks are subjected to mechanical and thermal lo...
متن کاملNonlinear Gas Turbine Modelling: a Comparison of Narmax and Neural Network Approaches
In this paper two nonlinear modelling approaches are employed to derive single nonlinear models for a Rolls Royce aircraft gas turbine. The first approach is based on the estimation of a NARMAX model using conventional structure selection and parameter estimation techniques, and the second approach is based on the use of feedforward Multilayer-Perceptron (MLP) neural networks. The performances ...
متن کاملInvestigation of Different Validation Parameters of Micro Gas Turbine for Range Extender Electric Truck
Nowadays the demand for reducing pollutant emissions and fuel consumption have paved the way of developing more fuel-efficient power generation system for transportation sector. Micro gas turbine (MGT) system can be an alternative to internal combustion reciprocating engine due to its light-weight and less fuel consumption. In this paper, some major running and operating characteristics of MGT ...
متن کاملNonlinear Gas Turbine Computer Modelling using NARMAX structures
This paper provides a comparison of techniques used to model the fuel flow to shaft speed relationship of a Spey gas turbine engine. Linear models are examined and the need for nonlinear modelling is justified. A technique based on nonparametric data analysis is proposed, to simplify the identification of a nonlinear model of the engine. A NARMAX model is identified and its performance validate...
متن کامل