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Turbofan engine control design using robust multivariable control technologies

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3 Author(s)
Frederick, Dean K. ; Unified Technol. Inc., Troy, NY, USA ; Garg, Sanjay ; Adibhatla, S.

A unified robust multivariable approach to propulsion control design has been developed at NASA Glenn Research Center. The critical elements of this unified approach are: a robust H control synthesis formulation; a simplified controller scheduling scheme; and a new approach to the synthesis of integrator windup protection gains for multivariable controllers. This paper presents results from an application of these technologies to control design for linear models of an advanced turbofan engine. The objectives of the study were to transfer technology to industry and to identify areas of further development for the technology. The technology elements and industrial development of tools to implement the steps are described with respect to their application to a GE variable-cycle turbofan engine. A set of three-input/three-output three-state linear engine models was used over a range of power levels covering engine operation from idle to maximum unaugmented power. Results from simulation evaluation are discussed and insight is provided into how the design parameter choices affect the results

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Control Systems Technology, IEEE Transactions on  (Volume:8 ,  Issue: 6 )