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Neuro-fuzzy approach for performance optimisation of variable nozzle turbofan engine

Published online by Cambridge University Press:  03 February 2016

T. R. Nada  and
A. A. Hashem
T. R. Nada
Affiliation:
National Authority for Remote Sensing and Space Science, Cairo, Egypt
A. A. Hashem
Affiliation:
Aerospace Engineering Department, Cairo University, Egypt
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Abstract

An algorithm employing adaptive neuro-fuzzy online identification and sequential quadratic programming optimisation techniques is developed to enhance aircraft engine performance. This algorithm is implemented and tested using digital simulation for two spool, mixed exhaust, variable geometry turbofan engine. Parametric study is conducted to select the proper measurable parameter that can represent the actual thrust during online optimisation. Subtractive clustering technique is applied to generate the minimum number of fuzzy rules that can model the engine performance at various input parameters and flight conditions. The resulting neuro-fuzzy system is then optimised through training algorithm to accurately represent the engine. This system can address engine variations by relearning the network using online measurements from the actual engine. Generating the optimum schedules and comparing them with those obtained from the complete non-linear engine model verify the algorithm. Benefits from this algorithm include fuel consumption savings, reductions in turbine inlet temperature, and preventing limit exceeding.

Type
Research Article
Information
The Aeronautical Journal , Volume 109 , Issue 1093 , March 2005 , pp. 139 - 146
Copyright
Copyright © Royal Aeronautical Society 2005 

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