JET ENGINE'S ROTATION SPEED CONTROL BASED ON THE FUEL'S INJECTION DIFFERENTIAL PRESSURE'S CONTROL

This paper deals with an automatic system for a jet engine's speed control, which uses a differential pressure controller coupled with the engine's fuel pump. One has established the system's non-linear mathematical model, the linearised and the non-dimensional mathematical model; based on this model, the block-diagram with transfer functions and the system's transfer function were issued. A stability study was performed, which has determined the system's stability domains; system's quality was also studied (some simulations were performed), based on its step response, considering the throttle's position as input and the engine's speed as output, for the maximum engine's operating regime. The co-efficient ensemble was determined for a single-spool jet engine RD9- type.