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Robust Control in Turbomachinery Configurations

  • Conference paper
Active Flow Control II

Part of the book series: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ((NNFM,volume 108))

Abstract

An experimental study of two different robust control approaches, namely H ∞ - and an improved slope-seeking control is presented. The H ∞ -control is used within an axial turbomachine and a highly loaded compressor cascade. The flow field within both configurations can be stabilized whereby the pressure at the trailing edge of the compressor cascade can be controlled to prespecified values and disturbances are suppressed. Within the axial turbomachine stall can be prevented. The applied robust controller is capable of effectively rejecting large ambient disturbances while driving the plant to different operating points at the same time. By this, the usable aerodynamic range can be extended, concomitantly with an increase of performance. In both configurations, a higher pressure increase is attained by this closed-loop active flow control. Moreover, the H ∞ -controller is compared for the axial fan case to an improved version of an adaptive controller, a so called slope-seeking controller exploiting an extended Kalman filter for accelerated estimation of a gradient.

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Author information

Authors and Affiliations

  1. Berlin Institute of Technology, Chair of Measurement and Control, Berlin, Germany

    Olaf Wiederhold & Rudibert King

  2. Département Fluides, Thermique, Combustion, CEAT, Institut Pprime, CNRS - Université de Poitiers – ENSMA, UPR 3346, Poitiers, France

    Bernd R. Noack

Authors
  1. Olaf Wiederhold
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  2. Rudibert King
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  3. Bernd R. Noack
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Editors and Affiliations

  1. Institut für Prozess- und Verfahrenstechnik FG Mess- und Regelungstechnik, Technische Universität Berlin, Sekr. P 2-1, Hardenbergstr. 36a, 10623, Berlin, Germany

    Rudibert King

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Wiederhold, O., King, R., Noack, B.R. (2010). Robust Control in Turbomachinery Configurations. In: King, R. (eds) Active Flow Control II. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 108. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-11735-0_13

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  • DOI: https://doi.org/10.1007/978-3-642-11735-0_13

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-11734-3

  • Online ISBN: 978-3-642-11735-0

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