ABSTRACT
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.
