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A Neural Network Based Adaptive Observer for Turbine Engine Parameter Estimation

[+] Author Affiliations
Praveen Shankar, Rama K. Yedavalli

Ohio State University, Columbus, OH

Paper No. GT2006-90603, pp. 663-671; 9 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


Estimation of immeasurable parameters such as thrust and turbine inlet temperatures in turbine engines constitutes a significant challenge for the aircraft community. A solution to this problem is to estimate these parameters from the measured outputs using an observer. Currently existing technologies rely on Kalman and extended Kalman filters to achieve this estimation. This paper presents an adaptive observer that augments the linear Kalman filter with a neural network to compensate for any nonlinearity that is not handled by the linear filter. The neural network implemented is a Radial Basis Function Network that is trained offline using a growing and pruning algorithm. The adaptive observer is used to estimate HPT inlet temperature, thrust and stall margins.

Copyright © 2006 by ASME



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