METHOD OF CONTROL OVER STARTING ACCELERATION UNIT SUSTAINER ENGINE AND GENERATION OF COMMAND ''ACCELERATION UNIT FAULT'' IN DELTA-V MANEUVER Russian patent published in 2012 - IPC B64G1/26 B64G1/40 

FIELD: transport.

SUBSTANCE: invention relates to aerospace engineering, namely to control over sustainer engine start in placing acceleration unit in datum orbit after separation of carrier rocket. Sustainer engine is controlled in preset time interval after its start proceeding from measuring its imaginary acceleration. In case imaginary acceleration exceed minimum tolerable magnitude, generated is flag ''Sustainer engine start'', otherwise flag ''Sustainer engine start fault'' and instructions '''Acceleration unit engine'' and ''Sustainer engine shutdown'' are generated. ''Sustainer engine start fault'' flag generated, acceleration unit orientation is retained, imaginary acceleration filtered magnitude is reset to vary pulse correction engine and sustainer engine switch-on time intervals set in flight assignment.

EFFECT: control over sustainer thrust, sustainer engine restart at zero thrust.