Design of a multivariable controller for a high-order turbofan engine model by Zakian's method of inequalities

The method of inequalities is used to design a simple multivariable controller for the regulation of the net thrust level, total airflow and inlet temperature of a 24th-order plant which consists of an F100 turbofan engine and actuators. These results reveal some of the inherent difficulties associated with the control of the plant.