chapter  22
20 Pages

ROBUST FEEDBACK CONTROL OF COMBUSTIONIN STABILITIES WITH MODEL UNCERTAINTY

ROBUST FEEDBACK CONTROL OF COMBUSTION

INSTABILITIES WITH MODEL UNCERTAINTY

V. Yang, B. S. Hong, and A. Ray

This paper deals with the development of a robust feedback controller

for suppressing combustion instabilities in propulsion systems with dis-

tributed actuators. Emphasis is placed on the treatment of model and

parameter uncertainties in both time and frequency domains. The con-

trol synthesis is based on an improved H

algorithm which guaran-

tees the stability of all perturbed dynamics within a given uncertainty

bound. The scheme is capable of rejecting exogenous disturbances a-

rising from sensor and plant noises, while optimizing the system per-

formance. Implementation of the controller in a generic dump combustor

with longitudinal pressure oscillations has been successfully achieved.