CUED Publications database

Delayed control of a Moore-Greitzer axial compressor model

Aernouts, W and Roose, D and Sepulchre, R (2000) Delayed control of a Moore-Greitzer axial compressor model. International Journal of Bifurcation and Chaos in Applied Sciences and Engineering, 10. pp. 1157-1164. ISSN 0218-1274

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Several feedback control laws have appeared in the literature concerning the stabilization of the nonlinear Moore-Greitzer axial compression model. Motivated by magnitude and rate limitations imposed by the physical implementation of the control law, Larsen et al. studied a dynamic implementation of the S-controller suggested by Sepulchre and Kokotović. They showed the potential benefit of implementing the S-controller through a first-order lag: while the location of the closed-loop equilibrium achieved with the static control law was sensitive to poorly known parameters, the dynamic implementation resulted in a small limit cycle at a very desirable location, insensitive to parameter variations. In this paper, we investigate the more general case when the control is applied with a time delay. This can be seen as an extension of the model with a first-order lag. The delay can either be a result of system constraints or be deliberately implemented to achieve better system behavior. The resulting closed-loop system is a set of parameter-dependent delay differential equations. Numerical bifurcation analysis is used to study this model and investigate whether the positive results obtained for the first-order model persist, even for larger values of the delay.

Item Type: Article
Divisions: Div F > Control
Depositing User: Cron Job
Date Deposited: 09 Dec 2016 17:41
Last Modified: 19 Jan 2017 03:46