Jet engine's speed controller with constant pressure chamber

The paper deals with an automatic system meant to control a jet engine's rotation speed, through the fuel injection's control, based on a constant pressure chamber controller. One has established the non-linear mathematical model (based on the motion equations of the system's parts), the linear model and the non-dimensional linear model, as well as the simplified model, the transfer function and the block-diagram. One had also performed a stability study and established the system's stability domains, as well as some quality studies.