Pressure based close loop thrust control in a turbofan engine

Details Pressure based close loop thrust control in a turbofan engine Pressure based close loop thrust control in a turbofan engine

1992-10-05

1994-04-19

Casaregola, Louis J.

Power plants

Reaction motor

Condition responsive thrust varying means

60243, 60 39281, F02C 928, F02K 117

Patent

active

053035453

ABSTRACT:
Fuel flow and nozzle area are controlled by a multi-variable control. A requested fan speed is compared with measured fan speed, producing an error signal which is translated in a proportional-integral inner control loop into a requested compressor pressure signal that represents an acceptable rate of change in compressor pressure for difference between requested and measured fan speed. The error signal is compared with measured compressor pressure; the difference being used in a multi-variable control to adjust fuel flow and turbine exhaust area to achieve the requested compressor pressure.

REFERENCES:
patent: 4809500 (1989-03-01), Roberts
patent: 4813226 (1989-03-01), Grosselfinger et al.
patent: 4984425 (1991-01-01), Smith
patent: 5022224 (1991-06-01), Smith

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