Sage Journals: Discover world-class research

Abstract

This paper describes the robust control design of a 1.5 MW free turbine with complex load. A non-linear model of the engine with load has been developed within Simulink from details previously presented. State space H_∞ control designs are performed using a linearized model to represent the key components in the multiloop control configuration. The performance criteria are specified in terms of stability margins, bandwidth and desired response of the engine to a severe load disturbance. The engine is subject to constraints on its manipulated variable (i. e. the throttle valve angle). The H_∞ design is simplified to a classical proportional-plus-integral (PI) controller. The results show that the PI control produces results similar to H_∞ at low speeds but that H_∞, gives better robustness and performance at higher speeds. Non-linear simulations with parameter changes support the conclusion that the design is robust.

Keywords

robust control non-linear dynamics

Get full access to this article

View all access options for this article.

References

Biss

Grimble

M. J.

Robust control of a 1.5 MW free turbine with complex load: Linear controller designs. In Proceedings of the ASME Conference on

Energy Systems Design and Analysis, 1994, PD-Vol. 64–6, pp. 139–148 (American Society of Mechanical Engineers, New York).

Biss

Gas turbine control using polynomial

H_∞ design techniques. PhD thesis, University of Strathclyde, Glasgow, 1991.

Biss

Schautt

M. J.

Walz

M. F.

Robust control of a 1.5 MW free turbine with complex load: Non-linear closed loop simulations. In Proceedings of the Conference on

Control, IEE Conference Publication 389, 1994, pp. 1176–1181 (Institution of Mechanical Engineers, London).

Hill

M. L. G.

H. S. D. E. non-linear simulation data for a 1.5 MW engine and load, H_∞ Controller Project at Strathclyde University. Technical report TPL 2179, Issue 1, Hawker Siddeley Dynamics Engineering, Welwyn Garden City, 1987.

Simulink User's Guide, 1992 (The Math Works, Inc., Natick, Massachusetts).

Schautt

Biss

Non-linear simulation and control of twin shaft gas turbine engine. Technical report 94/06, Centre for Systems and Control, University of Exeter, School Engineering, Exeter, 1994.

Hill

M. L. G.

Lecture Notes on Gas Turbine Control for Cranfield Institute of Technology, 1 January 1988 (Research and Development Consultancy, Wheathampstead, Hertfordshire).

Glover

Doyle

J. C.

State space for all stabilising controllers that satisfy an H_∞-norm bound and relations to risk sensitivity. Systems Control Lett., 1988, 11, 167–172.

Maciejowski

J. M.

Multivariable Feedback Design, 1989 (Addison-Wesley, New York).

10.

Abdelfatah

M. M.

A tutorial on magnetic levitation and its control system design. Technical report 20, Micro-Automation Group, Department of Mechanical Engineering, University of Texas, Austin, Texas, 1992.

11.

Chiang

R. Y.

Safonov

M. G.

Robust Control Toolbox User's Guide, 1992 (The Math Works, Inc., Natick, Massachusetts).

12.

Abdelfatah

M. M.

Busch-Vishniac

Robust

H_∞ controller design of two-link robots. In Proceedings of the First IEEE Regional Conference on Aerospace Control Systems, California, 1993, pp. 523–528 (IEEE, New York).

Robust control of a 1.5 MW free turbine engine

Abstract

Abstract

Keywords

Get full access to this article

References