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Thrust Control for a Turbofan Engine Using Estimation

[+] Author Affiliations
Dan Ring

Volvo Aero Corporation AB, Trollhättan, Sweden

Mattias Henriksson

Chalmers University of Technology, Göteborg, Sweden

Paper No. GT2006-91251, pp. 901-910; 10 pages
  • ASME Turbo Expo 2006: Power for Land, Sea, and Air
  • Volume 2: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Environmental and Regulatory Affairs
  • Barcelona, Spain, May 8–11, 2006
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4237-1 | eISBN: 0-7918-3774-2
  • Copyright © 2006 by ASME


A thrust control concept for a military turbofan engine is evaluated at sea level and static operation. Most of the design is performed in the linear domain and most validations are done by simulations of nonlinear models. The thrust control is included as an add-on to a robust and multivariable control concept. The presented methods are also applicable for control of other estimated properties. The thrust in this concept is estimated from engine measurements and engine control inputs and both a linear and a nonlinear estimator are presented. The simulation results are promising and the design methods are straight forward. For the estimator a Kalman filter is designed and the thrust control loop are simplified to a single input single output system with the estimator included, which allows standard design methods to be applied. For the operating regime the linear designs have also shown to be applicable to the nonlinear system.

Copyright © 2006 by ASME
Topics: Engines , Thrust , Turbofans



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