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1. (WO2016051047) METHOD FOR ELIMINATING THE POGO EFFECT

Pub. No.:    WO/2016/051047    International Application No.:    PCT/FR2015/052520
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Tue Sep 22 01:59:59 CEST 2015
IPC: F02K 9/56
Applicants: AIRBUS SAFRAN LAUNCHERS SAS
Inventors: LE GONIDEC, Serge, Daniel
TOUTIN, Jérémy
KERNILIS, Alain
CRASSOUS, Olivier
Title: METHOD FOR ELIMINATING THE POGO EFFECT
Abstract:
The invention relates to the field of jet propelled craft and more specifically to a method for eliminating the POGO effect in such a craft (1). A supply system (4) feeding the jet engine (2) of the craft (1) is equipped with a hydraulic accumulator (8) making it possible to select between a number of predetermined operating levels each corresponding to a different volume of gas. According to this method, if a first reference criterion is not satisfied by the current level, the method commands a transition of the hydraulic accumulator (8) preferably to an alternative level, selected from alternative levels for which the first reference criterion is satisfied and for which no hydraulic resonant frequency crosses any current mechanical resonant frequency during the transition.