| 摘要 |
FIELD: space engineering; ground tests and operation in space of plasma jet engines and electric jet engine plants. ^ SUBSTANCE: proposed method includes performance of shortened endurance tests which are part of total service life; in conducting these tests, erosion of discharge chamber (deltat), change in thrust at the beginning (Fo) and in the course (ft) of shortened endurance tests are measured, regressive analysis for determination of approximating dependences is performed in form of monotonic function of erosion of discharge chamber and thrust versus time of operation; prediction of behavior of thrust is performed by definite dependence Ft=f(Fo, t), at the beginning of shortened tests and in the course of conducting these tests erosion areas (So, St) are additionally determined; approximating dependence of erosion area versus time St=f(t) and functional dependence of thrust versus erosion area F=f(k,S) are determined by regressive analysis, where k is proportionality factor between thrust and erosion area which are taken into account in prediction of thrust behavior during total service life; thrust is determined by dependence Ft=f(Fo, k,.St, So) ^ EFFECT: enhanced accuracy of prediction of parameters of stationary plasma jet engine. ^ 2 dwg |
