Method and system of controlling a jet engine for avoiding engin

Details Method and system of controlling a jet engine for avoiding engin Method and system of controlling a jet engine for avoiding engin

1975-10-10

1978-12-19

Atkinson, Charles E.

Boots, shoes, and leggings

60 3929, 731174, 364426, G01M 1500

Patent

active

041308727

ABSTRACT:
A jet engine is controlled by placing time variant total pressure probes at the entry plane and the discharge plane of a jet engine fan. The pressure values at the probes are converted into electrical signals, filtered, and then fed to meters where the root-mean-square (RMS) values of the electrical signals are determined. The RMS values are fed to a computer which computes the ratio of the two RMS values and this ratio is fed to a comparison circuit which generates a difference signal representing the difference between the RMS ratio and a predetermined limit value. If the RMS ratio equals the limit value, then the operating point of a fan is altered by either changing the nozzle area, changing the fan speed, or changing the altitude or Mach number.

REFERENCES:
patent: 2941399 (1960-06-01), Bersinger
patent: 3533238 (1970-10-01), Marvin
patent: 3835701 (1974-09-01), Murphy et al.
patent: 3886790 (1975-06-01), Plett

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