Toward an intelligent, deterioration accommodating controller for aging turbofan engines

J. A. Turso, J. S. Litt

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)641-651
Number of pages11
JournalAeronautical Journal
Issue number1137
StatePublished - Nov 2008

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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