Research Papers

Servocontrol of the GS16 Turbine Gas Metering Valve by Physics-Based Robust Controller Synthesis

[+] Author and Article Information
Kamran E. Shahroudi

 Woodward Industrial Controls, Department 608, 1000 E. Drake Road, Fort Collins, CO 80525

Peter M. Young

Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523

J. Dyn. Sys., Meas., Control 130(5), 051008 (Aug 04, 2008) (9 pages) doi:10.1115/1.2957630 History: Received June 28, 2007; Revised May 01, 2008; Published August 04, 2008

We present a design approach for robust controller synthesis using a μ-synthesis procedure, which returns a controller in an observor/state-feedback form with physically meaningful states. We are also able to (approximately) retain this physical meaning when using balanced truncation to (significantly) reduce the controller order, as is often necessary in practice. The advantages of this physics-based approach are illustrated by a detailed outline of the controller design for Woodward Governor’s GS16 Turbine Gas Metering Valve.

Copyright © 2008 by American Society of Mechanical Engineers
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Figure 1

Problem setup for μ synthesis

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Figure 2

D-K iteration for μ-synthesis

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Figure 3

Numerical scaling in H∞ optimization

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Figure 4

Observor/state-feedback controller implementation

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Figure 5

Performance of μ-synthesis controller

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Figure 6

States for standard- and physics-based μ-synthesis controllers

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Figure 7

The GS16 actuator

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Figure 8

The design process

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Figure 9

The 2DOF design model

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Figure 10

The reduced controller

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Figure 11

Measured and target large step response for three different friction levels

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Figure 12

Measured and target small step response for three different friction levels

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Figure 13

Measured and target frequency response for three friction levels and two perturbation levels




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