METHOD OF CORRECTING PARAMETERS OF UPPER-STAGE ROCKET ORIENTATION PROGRAMME Russian patent published in 2011 - IPC G05D1/08 

FIELD: physics.

SUBSTANCE: invention relates to controlling movement of the upper-stage rocket (USR) when taking it to the intended orbit. Terminal control enables adjustment of deviations from the intended orbit of radial velocity ΔV and radius vector ΔR at a predicted moment T_pr for shutting down the cruise engine. The actual shutdown of the cruise engine is carried out at time T_f when the energy functional reaches the value given in the flight mission. If T_pr and T_f do not coincide, manoeuvre ends with deviations of radial velocity ΔV_K and radius vector ΔR_K, which affects accuracy of the formed orbit. In the disclosed method, movement parameters of the upper-stage rocket at the cruise engine shutdown moment are predicted. These parameters are then used to determine deviation of the radius vector and radial velocity of the centre of mass of the upper-stage rocket from their values at the intended orbit. Angle and angular velocity correction control signals of the upper-stage rocket are generated in the pitch channel. The pitch angle correction signal is restricted on the given level. Further, the angular velocity in pitch correction signal is varied in proportion to that restriction level and inversely proportional to the pitch angle correction signal value formed before said restriction, and at a set time interval before the predicted moment for shutting down the cruise engine, the predicted deviation of the radius vector is taken as zero.

EFFECT: high accuracy of the formed orbit.

3 dwg, 1 tbl