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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Feasibility Analysis for the Rotordynamic Performance of API617

[+] Author and Article Information
Hyeong-Joon Ahn, Eric H. Maslen, Tetsuya Iwasaki

Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer’s Way, Charlottesville, VA 22904-4746

J. Eng. Gas Turbines Power 127(2), 418-424 (Apr 15, 2005) (7 pages) doi:10.1115/1.1789492 History: Received October 01, 2002; Revised March 01, 2003; Online April 15, 2005
Copyright © 2005 by ASME
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References

Figures

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An example of an uncertain system
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Relation between the rotor speed N and vibration A
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Interpretation of the separation margin (a) pole placement, (b) robust stability problem
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A weighting scheme for API 617 standard
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A weighting function for the worst case unbalance excitation
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7th order elliptic filter for the uncertain modal damping
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Results with the original actuator
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Pole/zero map: (a) augmented open-loop plant, (b) closed-loop system
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Stiffness of the designed controller
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Results after reducing the conservativeness
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Pole/zero map of the closed-loop system after reducing the conservatism
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Stiffness of the controller after reducing the conservatism

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