Model-based control of thermoacoustic instabilities in partially premixed lean combustion – a design case study

Author: Yuan Xiao-Chuan   Glover Keith  

Publisher: Taylor & Francis Ltd

ISSN: 1366-5820

Source: International Journal of Control, Vol.86, Iss.11, 2013-11, pp. : 2052-2066

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Abstract

Self-excited oscillation is becoming a major issue in low-emission, lean partially premixed combustion systems, and active control has been shown to be a feasible method to suppress such instabilities. A number of robust control methods are employed to obtain a feedback controller and it is observed that the robustness to system uncertainty is significantly better for a low complexity controller in spite of the norms being similar. Moreover, we demonstrate that closed-loop stability for such a complex system can be proved via use of the integral quadratic constraint method. Open- and closed-loop nonlinear simulations are provided.