Статистическое уточнение импульса последействия маршевого двигателя разгонного блока «Фрегат» для повышения точности выведения космических аппаратов

Abstract

As it is known from practice, the most important influence on the accuracy of the payload launching into the target orbit is exerted by measurement errors of the command instrumentation system sensors, as well as by the sustainer afteraction pulse spread. A method is considered to increase accuracy of launching into a given orbit using the Fregat upper stage by refining the sustainer afteraction pulse. According to the results of launches, actual errors in the realized orbit linear parameters were recalculated in the afteraction pulse deviations. Then, the afteraction pulse average value was refined by statistical analysis in several iterations, which made it possible to significantly reduce the launching errors and confirm correctness of the developed technique.