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Research Papers: Gas Turbines: Controls, Diagnostics, and Instrumentation

Approximate Nonlinear Modeling and Feedback Linearization Control for Aeroengines

[+] Author and Article Information
Hui Zhao

Department of Energy Science and Engineering, Harbin Institute of Technology, 150001 Heilongjiang, P.R.C.zhth_908@163.com

Jinfu Liu

Department of Energy Science and Engineering, Harbin Institute of Technology, 150001 Heilongjiang, P.R.C.jinfu_liu1977@yahoo.com.cn

Daren Yu

Department of Energy Science and Engineering, Harbin Institute of Technology, 150001 Heilongjiang, P.R.C.yudaren@hcms.hit.edu.cn

J. Eng. Gas Turbines Power 133(11), 111601 (May 17, 2011) (10 pages) doi:10.1115/1.4003642 History: Received July 01, 2010; Revised January 30, 2011; Published May 17, 2011; Online May 17, 2011

This paper aims to develop an applicable nonlinear control technique for aeroengines. An approximate nonlinear model is presented and a rational identification procedure is given. Exact input-output feedback linearization can be easily performed on this model. The controller derived can approximately linearize the plant such that the close-loop system exhibits linear input-output dynamics locally. Modeling and controlling are exemplified and validated by a small turbofan engine. Simulation results illustrate that the modeling accuracy is good and linear close-loop system dynamics are achieved.

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Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Feasible mappings to build an EME model

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Figure 2

Command signal of fuel flow

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Figure 3

Deviations responding to the command signal in Fig. 2

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Figure 4

Slow speed-up test

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Figure 5

Error plots for slow speed-up test

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Figure 7

Error plots for triangular test

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Figure 8

AFBL control scheme

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Figure 9

Step response of nH with AFBL

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Figure 10

Fan speed and fuel flow dynamics with AFBL

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Figure 11

Slow speed-up simulation with AFBL control

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Figure 12

Large transient simulation with AFBL control

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Figure 13

AFBL control test on the deteriorated engine

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Figure 14

AFBL control test for other flight conditions

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