Lor-based least-squares output feedback control of rotor vibrations using the complex mode and balanced realization methods

G. W. Fan, H. D. Nelson, P. E. Crouch, Marc Mignolet

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The complex mode and balanced realization methods are used separately to obtain reduced-order models for general linear asymmetric rotor systems. The methods are outlined and then applied to a typical rotor system which is represented by a 52 degree-of-freedom finite element model. The accuracy of the two methods is compared for this model and the complex mode method is found to be more accurate than the balanced realization method for the desired frequency bandwidth and for models of the same reduced order. However, with some limitations, it is also shown that the balanced realization method can be applied to the reduced-order complex mode model to obtain further order reduction without loss of model accuracy. An "Linear-Quadratic-Regulator-based leastsquares output feedback control" procedure is developed for the vibration control of rotor systems. This output feedback procedure eliminates the requirement of an observer for the use of an LQ regulator, and provides the advantage that the rotor vibration can be effectively controlled by monitoring only one single location along the rotor shaft while maintaining an acceptable performance. The procedures presented are quite general and may be applied to a large class of vibration problems including rotor-dynamics.

Original languageEnglish (US)
Title of host publicationManufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791878972
DOIs
StatePublished - Jan 1 1992
EventASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992 - Cologne, Germany
Duration: Jun 1 1992Jun 4 1992

Publication series

NameASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
Volume5

Other

OtherASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
CountryGermany
CityCologne
Period6/1/926/4/92

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering

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    Fan, G. W., Nelson, H. D., Crouch, P. E., & Mignolet, M. (1992). Lor-based least-squares output feedback control of rotor vibrations using the complex mode and balanced realization methods. In Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education (ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992; Vol. 5). American Society of Mechanical Engineers. https://doi.org/10.1115/92GT009