METHOD OF CONTROL OVER SPACECRAFT SOLAR BATTERY ORIENTATION WITH CONTROL OVER SPINNING DIRECTION AND CONTINUOUS CHANGE OF DATA ON SOLAR BATTERY ANGULAR POSITION Russian patent published in 2014 - IPC B64G1/44 

FIELD: transport.

SUBSTANCE: invention relates to spacecraft electric power supply with the help of solar batteries. Proposed method comprises definition of preset and current angles of solar battery orientation and solar battery angular velocity (ω_SB). Design angle is computed to assign measured angle magnitude thereto and memorised prior to start of control over solar battery. Solar battery is spinned in direction of decrease in mismatch between preset and design angles. Defined are angles of solar battery acceleration and deceleration (t_AC, α_DEC) and threshold (t_THR, α_THR) and maximum tolerable angle of its deflection (α_MAX) proceeding from minimum tolerable currents of solar battery. Said angles are used to set operation threshold (α_S). The latter exceeded, said mismatch is generated. The latter is not taken into account if lower than drop-away threshold (α_DROP). The latter reached, solar battery spinning is terminated. Solar battery design angle is corrected with the limits of one discrete sector of solar battery spinning circle. Discrete sector magnitude depends of angles α_AC, α_THR and α_S. Depending upon α_S and ω_SB threshold of the interval of control over continuous variation of data on solar battery angular position is set. Count of said interval is made if current measured angle differs from memorised one by more than one discrete sector and is terminated otherwise. Threshold of the time of control over solar battery spinning is set depending upon t_AC, t_THR, α_MAX, ω_SB and discrete sector magnitude. This time is counted at zero time of control over continuity is sign of mismatch between measured and memorised angles dose not satisfy the solar battery preset direction of spinning. Otherwise, count is terminated to zero the time of control of spinning direction. Note here that when measured angle varies by one discrete sector, angular angle of boundary between discrete sectors is taken to be design angle to assign new measured angle to memorised angle. In case the time of control over continuity or that over spinning direction exceeds its threshold, failure signal is generated to terminate control over solar battery.

EFFECT: higher survivability and efficiency.

3 dwg