Accuracy estimation of the technique for reconstructing the spacecraft attitude motion by measurements of its angular rate and Earth magnetic field strength

Abstract: The reconstruction technique is based on processing the measurements of two vectors: the spacecraft angular rate and the strength of the Earth magnetic field. The processing technique uses kinematical equations of the attitude motion of a rigid body. In its framework, the measurement data of both types, collected on a time interval, are processed jointly. The angular rate data are smoothed by suitable functions and those functions are substituted in kinematical equations for components of the quaternion, which defines a transformation of the spacecraft coupled coordinate system to inertial one. The equations obtained present the kinematical model of a spacecraft attitude motion. The solution of the equations, which approximates the real motion, is found by the least squares method from the condition of the best agreement between measurement and calculation data of the magnetic strength. The accuracy of the technique was investigated by processing measurements obtained on board Service Module of ISS. The reconstruction of ISS attitude motion was compared with telemetry data of its real motion. The errors of reconstruction of the motion in orbital orientation did not exceed 0.6°, the errors of reconstruction of rotations did not exceed 1.2°.Note: Research direction:Theoretical and applied problems of mechanic

Reconstruction of spacecraft Progress attitude motion in single axis solar orientation mode by measurements of current from solar arrays

Abstract: We reconstructed the uncontrolled attitude motion of the cargo spacecraft Progress M-24M, M-25M, MC-05 и MC-06 in the single-axis solar orientation mode (so-called solar rotation). At the beginning of the oriented motion, the spacecraft rotated around the normal to solar batteries with angular rate 2.2 deg./s and the normal was directed to the Sun. The oriented motion lasted for a few orbit revolutions. The reconstruction was made using measurements of the electric current from spacecraft solar arrays. The measurement data, collected in a time interval about a few tens of minutes, were processed simultaneously by statistical methods and integration of the spacecraft attitude motion equations. As a result, the spacecraft attitude motion was reconstructed relative to the direction Earth – Sun. The investigation of the current specter showed the possibility of this way of motion reconstruction using current measurements, which were seemed to be not informative for this purpose.Note: Research direction:Theoretical and applied problems of mechanic

The real attitude motion of the spacecraft Progress M-20M in the mode of gravitational orientation

Abstract: We reconstructed the uncontrolled attitude motion of the spacecraft Progress M-20M in the mode of single-axis gravitational orientation (gravitational orientation of a rotated spacecraft). In this mode, the spacecraft rotated around its longitudinal axis with the angular rate 0.1÷0.2 deg./s, the axes being oscillated near the local vertical. The oriented motion lasted for a few orbit revolutions. The reconstruction was made using measurements of the spacecraft angular rate. The measurement data, collected in a time interval about 7 hours, were processed simultaneously by statistical methods and integration of the spacecraft attitude motion equations. The estimations of the mathematical model parameters and initial conditions of the attitude motion were obtained as a result of such processing. The results of reconstruction were checked by measurements of the electric current from the spacecraft solar batteries. We reconstructed the motion in three time intervals in February 2014. The gravitational orientation mode of Progress M-20M was realized for preparation to the experiments with convection sensor DACON-M.Note: Research direction:Theoretical and applied problems of mechanic

Регион в условиях развития информационного общества

В коллективной монографии рассматриваются вопросы развития региональной социально-экономической системы в условиях развертывания цифровой экономики на примере Владимирской области.Основное внимание уделено вопросам моделирования поведения социально-экономических систем микроуровня, управления государственной собственностью, естественными монополиями, региональным бизнесом, продовольственной безопасностью, человеческим капиталом, инвестициями и инновациями, а также использованию проектного менеджмента,особенностям и перспективам государственного контроля. Монография предназначена для научных работников, преподавателей, аспирантов, магистрантов, студентов вузов, изучающих экономические и управленческие дисциплины, руководителей предприятий и организаций