Simulation of the control system of the electrodynamic accelerator of dust particles

Рассмотрено устройство и система управления ускорителя заряженных микронных частиц для моделирования микрометеоритов и техногенных частиц в лабораторных условиях. Описана модель работы системы управления ускорителем, приведены результаты моделирования функционирования системы управления ускорителем для различных режимов работы. Представлены результаты сравнения математического моделирования с экспериментальными данными. The device and control system of the accelerator of charged micron particles for simulation of micrometeorites and technogenic particles in laboratory conditions is considered. The model of the accelerator control system operation is described, the results of modelling the functioning of the accelerator control system for various operating modes are given. The results of comparison of mathematical modelling with experimental data are presented

Uncontrolled attitude motion of the prototype of the small spacecraft Aist

Abstract: We present the results of reconstruction of the uncontrolled attitude motion of the prototype of the small spacecraft Aist during its flight at the beginning of 2014. The reconstruction was realized by processing onboard measurements of the Earth magnetic field. The measurement data were accumulated in time segments, which had length about 100 min. The measurement data on each such segment were processed sim-ultaneously by means of the least squares method and integration of the spacecraft attitude motion equations. The estimates of the mathematical model parameters and initial conditions of the attitude motion were obtained as a result of such processing. The results of processing some segments above made clear the attitude motion of the spacecraft.Note: Research direction:Theoretical and applied problems of mechanic

Determining the small spacecraft Aist-2D attitude motion by measurements of the equipment KMU-1

Abstract: The paper presents the results of reconstruction of the spacecraft Aist-2D attitude motion in summer 2016. The reconstruction 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 interpolated by piecewise linear 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 the 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 measured and calculated data of the magnetic strength. The technique allows reconstructing the attitude motion on time intervals more than 10 hours.Note: Research direction:Theoretical and applied problems of mechanic

Determination of the spacecraft Aist attitude motion on measurements of the Earth magnetic field

Abstract: We present the results of reconstruction of the uncontrolled attitude motion of the small spacecraft Aist during its flight in May 2013. The reconstruction was realized by processing onboard measurements of the Earth magnetic field strength. The measurement data were accumulated in time segments, which had length about 100 min. The measurement data on each such segment were processed simultaneously by means of the least squares method and integration of the spacecraft attitude motion equations. The estimates of the mathematical model parameters and initial conditions of the attitude motion were obtained as a result of such processing. The results of processing some segments above made clear the attitude motion of the spacecraft.Note: Research direction:Theoretical and applied problems of mechanic