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A robust controller design for supersonic intermittent blowdown-type windtunnels

Published online by Cambridge University Press:  04 July 2016

D-S. Hwang  and
P-L. Hsu
D-S. Hwang
Affiliation:
Department of Telecommunication EngineeringChina Junior College of Marine Technology, Taipei, Taiwan
P-L. Hsu
Affiliation:
Department of Electrical and Control EngineeringNational Chiao Tung University, Hsinchu, Taiwan
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Abstract

Effective operation of a large-scale supersonic intermittent blow-down windtunnel system requires suitable control of the air control valve to establish the desired pressure profile in the settling chamber and generate a corresponding supersonic air flow. In this paper, we establish a lumped parameter nonlinear time-varying mathematical model for blowdown-type windtunnels, based on the thermal-fluid mechanical balance principle. We apply the LQG/LTR procedure to achieve a robust controller design that diminishes the effects of unavoidable uncertainties and time-varying characteristics and obtains the desired experimental environment in the system. Simulation results show that this LQG/LTR based controller, with a carefully selected loop shape combining both anti-integrator windup and the time-delay compensation schemes, achieves satisfactory control performance for the entire windtunnel testing procedure.

Type
Research Article
Information
The Aeronautical Journal , Volume 102 , Issue 1013 , March 1998 , pp. 161 - 170
Copyright
Copyright © Royal Aeronautical Society 1998 

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References

1. Pope, A. and Goin, K.L. High-speed Windtunnel Testing, John Wiley & Sons, NY, 1965.Google Scholar
2. Cramer, C. and Gerhardt, H.T. Windtunnels for industrial aerodynamics, J Wind Eng Ind Aerodyn, 1984, 16, pp 225–264.Google Scholar
3. Necati, G.A. Improvement of airflow quality in an open jet windtunnel, J Wind Eng Ind Aerodyn, 1984, 16, pp 279–292.Google Scholar
4. Miwa, H., Sato, M., Sakakibara, S. and Takashima, K. Closed-loop Mach number control in a blowdown transonic windtunnel, Conf of Fluid Cont and Meas, Tokyo, Japan, Sept 1985, pp 515–520.Google Scholar
5. Soeterboek, A.R.M., Pels, A.F., Vergruggen, H.B. and van Langen, G.C.A. A predictive controller for the Mach number in a transonic windtunnel, Cont Sys Magazine, Jan 1991, pp 63–72.Google Scholar
6. Manitius, A.Z. Feedback controllers for a windtunnel model involving a delay: analytical design and numerical simulation, IEEE Trans A C, 1984, 29, pp 1058–1068.Google Scholar
7. John, and James, E.A. Gas Dynamics, Allyn and Bacon, 1984.Google Scholar
8. Stein, G. and Athans, M. The LQG/LTR procedure for multivariable feedback control design, IEEE Trans AC, 1987, 32, pp 105–114.Google Scholar
9. Doyle, J.C. and Stein, G. multivariable feedback design: concepts for a classical/Modern synthesis, IEEE Trans AC, 1981, 26, pp 4–16.Google Scholar
10. Seborg, D.E., Edgar, T.F. and Millichamp, D.A. Process Dynamics and Control, John Wiley & Sons, 1989.Google Scholar
11. Maciejowski, J.M. Multivariable Feedback Design, Addison-Wesley, 1989.Google Scholar
12. Lehtomaki, N.A., Sandell, N.R. and Athans, M. Robustness results in linear-quadratic gaussian based multivariable control designs, IEEE Trans AC, 1981, 26, pp 75–92.Google Scholar
13. Doyle, J.C. Guaranteed margins for LQG regulators, IEEE Trans AC, 1981, 26, pp 4–16.Google Scholar
14. Astrom, K.J. and Rundqwist, L. Integrator windup and how to avoid it, ACC, 1989, Vol 2, pp 1693–1698.Google Scholar
15. Hanus, R., Kinnaert, M. and Henrotte, J.L., Conditioning technique, a general anti-windup and bumpless transfer method, Automatica, 1987, 23, pp 729–739.Google Scholar
16. Davison, E.J. The design of controllers for the multivariable robust servomechanism problem using parameter optimization method, IEEE Trans AC, 1981, 26, pp 93–110.Google Scholar
17. Garg, S. Turbofan engine control system design using the LQG/LTR methodology, ACC, 1989, Vol 1, pp 134–141.Google Scholar
18. Hwang, D.S. and Hsu, P.L. The LQG/LTR Controller design for the windtunnel, Proc IASTED on Modelling, Identification and Control, Innsbruck, Austria, 1992, pp 371–374.Google Scholar
19. Marshall, J.E. Control of Time-delay Systems, Peter Peregrinus, 1979.Google Scholar
20. Meyer, C., Seborg, D.E. and Wood, R.K. A Comparison of the Smith predictor and conventional feedback control, Chemical Eng Sci, 1976, 31, pp 775–778.Google Scholar