| 摘要 |
FIELD: cosmonautics, automatics and computer engineering. SUBSTANCE: invention is meant for design of system of autonomous celestial orientation of spacecraft having immobile astrosensores based on precision change-coupled device matrixes in its mixes. Proposed system includes unit of astrosensors 1 composed of TV cameras based on solid matrix CCD receivers used as transducers of pictures of starry sky from which output coordinates of observed stars are picked off in instrument system of coordinates of astrosensors and storage 2 of airborne star catalogue from which output coordinates of same stars are picked off with the proviso that is no deviation of spacecraft from axes of "ПОСК" . Signals from outputs of units 1 and 2 are fed to inputs of Kalman filters 3, 3.1, ... 3.N. Filter 3 is tuned to model of normal functioning of system and filters 3.1, ... 3.N are tuned to various models of possible troubles. Signals from outputs of Kalman filters are sent to inputs of units 4, 4.1 ... 4.N for calculation of relations of likelihood which determine how well each of filters follows and predicts behavior of observed variables. Signals from outputs of units 4, 4.1 ... 4.N go to comparator 5 which selects most likely model. If model does not correspond to model of normal functioning of system there is sent signal of presence of fault and of most probable model of fault. EFFECT: expanded functional capabilities of system thanks to prealization of test of its technical state under working mode. 2 dwg |
