Design of a Multi-Loop Controller for Controlling a Small Turbofan Engine

The design and research in the field of small turbofan engines has received much attention in recent years. These engines are commonly developed from the development of small jet engines and usually their core includes a microjet engine. In this paper, a control system is designed and simulated for a small single-spool turbofan engine. A thermodynamic model is considered to simulate the engine behavior and a multi-loop control structure that meets the engine control requirements is presented. Considering that in such engines only the engine spool speed and exhaust gas temperature are measured by sensors, the designed algorithm using these two variables provides the required thrust and maintains the constraints governing the engine limits.