A Multi-Variable Control for a Turbofan Engine Operating at Sea Level Static

Based on modern control theory, a multi-variable control is formulated for a two-spool turbofan engine operating at sea level static conditions. The proposed control yields idle to intermediate transients in 40 percent of the time required by the conventional controls in non-linear simulations while maintaining similar stall and temperature overshoot characteristics. The formulated control is simpler than earlier proposed multi-variable controls and yields acceptable performance during small thrust changes and decelerations.