IMC control of combustion instability

Combustion instability is a phenomenon that happens in a gas turbine when the lean premixed combustion mode is used to reduce the NOx emissions. The process is unstable and thus difficult to control. This paper applies the internal model control (IMC) method in the control of the combustion instability, with the aim of finding effective control structures and methods for this kind of system, and preparing for the study of wide-range robust control. Design results show that the IMC controller has good disturbance rejection capability, but the method should be improved to achieve better performance for the active control of combustion instability.

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