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Toward an intelligent, deterioration accommodating controller for aging turbofan engines

Published online by Cambridge University Press:  03 February 2016

J. A. Turso  and
J. S. Litt
J. A. Turso
Affiliation:
Northrop Grumman Ship Systems, Pascagoula, Mississippi, USA
J. S. Litt
Affiliation:
NASA Glenn Research Center, Cleveland, Ohio, USA
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Abstract

A method for accommodating engine deterioration via a scheduled linear parameter varying quadratic Lyapunov function (LPVQLF)-based controller is presented. The LPVQLF design methodology provides a means for developing unconditionally stable, robust control of linear parameter varying (LPV) systems. The controller is scheduled on the engine deterioration index, a function of estimated parameters that relate to engine health, and is computed using a multilayer feedforward neural network. Acceptable thrust response and tight control of exhaust gas temperature (EGT) is accomplished by adjusting the performance weighting on these parameters for different levels of engine degradation. Nonlinear simulations demonstrate that the controller achieves specified performance objectives while being robust to engine deterioration as well as engine-to-engine variations.

Type
Research Article
Information
The Aeronautical Journal , Volume 112 , Issue 1137 , November 2008 , pp. 641 - 651
Copyright
Copyright © Royal Aeronautical Society 2008

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