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Information × Registration Number 0215U004089, 0114U003517 , R & D reports Title Methods and algorithms for small spacecraft precise robust failover control and it on a problem-oriented processors. Stage 2 "Development of control and state estimation methods for small spacecrafts and their realization on the problem-oriented processors" popup.stage_title Head Kuntsevich Vsevolod Mykhailovich, Registration Date 05-02-2015 Organization Space Research Institute of National Academy of Sciences of Ukraine and State Space Agency of Ukraine popup.description2 The objects of the research are methods of failsafe high precision attitude control of small spacecrafts (SSC) and development of problem-oriented processors based on programmable logic devices (PLDs). The purpose of research is development of robust methods failsafe high precision attitude control of SSC and development on the basis of the experimental crystals of PLD's core problem-oriented processor for implementing control algorithms of SSC. Research methods are methods of dynamic systems (DS) under parametric uncertainty and external disturbances, stability theory and theoretical mechanics, theory of computing systems design. The results obtained are recurrent robust methods of ellipsoidal state estimation of continuous-discrete DS adapted to estimate the full parameter vector orientation SSC with current measurements of position sensors. Mathematical models of managed angular motion of the SSC in the form of difference and differential equations using Krylov angles and normalized quaternion components. Observability and controllability of the modal-physical model of an elastic spacecraft for planar motion are analyzed. It is shown that this model using measurements starsensors is observable and controllable (taking into account the elastic spacecraft design). To ensure accurate spacecraft attitude method for calculating estimates of the angular velocity of the spacecraft based on using weighted least squares is proposed. The method of constructing onboard digital computer(ODC) with the use of ACTEL PLD and processor parallelism that can significantly reduce the cost of manufacturing ODC and its software due to the complexity of the internal language of the processor is developed. An experimental kernel problem-oriented processor based on PLD crystals (Series Virtex-4 and Virtex-7 of Xilinx firm) is created for the implementation of control algorithms in data formats with floating point (single and double precision), its correct operation is tested through simulation. Product Description popup.authors Бабій Надія Анатоліївна Волосов Віктор Вікторович Губарев Вячеслав Федорович Кунцевич Всеволод Михайлович Лісовий О.М. Мельничук Сергій Вікторович Опанасенко В.М. Палагін О.В. Сімаков В.О. Сальніков Микола Миколайович Семотюк М.В. Царук Ніна Петрівна Шевченко Володимир Миколайович popup.nrat_date 2020-04-02 Close