STABILIZATION METHOD OF STRUCTURALLY UNSTABLE FLUID OSCILLATOR OF BOOSTER UNITS AND UPPER STAGES OF CARRIER ROCKETS Russian patent published in 2020 - IPC B64G1/24 

FIELD: astronautics.

SUBSTANCE: invention relates to control of movement of upper-stage rocket (USR) and upper stages (US) of carrier rockets (CR) during operation of mid-flight liquid propulsion system with deflected engine. Departure of mid-flight engine implements software movement of the upper-stage rocket (US CR), its stabilization, as well as compensation of external and process disturbances. For stabilization of structurally unstable oscillators (UO) of USR (US CR) liquid, the parameters of motion are measured and a stabilization algorithm is used, based on use of a priori data on dynamic properties of USR (US CR). At the same time in the given algorithm the observer of the UO used condition is used, which provides convergence of estimates to the observed coordinate and speed for the specified time. Observer is reduced to the type of the second-order dynamic link, which is insensitive to process disturbances and given deviations of parameters of the UO.

EFFECT: technical result of invention is providing asymptotic stability of liquid oscillators.

1 cl, 4 dwg