Abstract. This paper presents the electric drive control system of corner reflectors of the infrared Fourier transform spectrometer for meteorological satellite. Limited-swing brushless DC motor with a torsional bearing is used as a drive motor. Stringent requirements are imposed to the drive control system for stabilization of moving speed of the reflectors while obtaining the interferogram and for limitation of the reverse time. Research of influence of torsion on steady-state error of speed and ways of its compensation is conducted. The obtained results are consistent with the simulation results of the drive. It is shown that the developed drive is operable in a spacecraft system.
The article studies factors influencing the development of social entrepreneurship in the Russia in comparison with other countries. The development of social entrepreneurship in the modern world plays a significant role for the state and society. The conducted research shows the scale of social entrepreneurship and the impact of many different factors on its effective development. The article found out that social entrepreneurship in Russia can develop along a synthetic path that includes features of both countries as with a liberal economy as more socialist-oriented. In Eastern Europe, thanks to the USSR legacy, the tendency to provide population with social services through state, financed and managed mechanisms has remained. As studies of the social services sector in countries with liberal economy showed, for example, the USA, social entrepreneurship is encouraged by the state with the help of fiscal preferences. At the same time, the state practically does not provide social services transferring them to private capital. In countries with a more socialist-oriented economy, the state financial and regulatory role is more pronounced, social services are regulated in detail and are rendered both by state institutions, and within the framework of public-private partnership and private capital. In addition to factors, the author identifies the actual problems and trends in the development of social entrepreneurship through propaganda and education means. Proposals have been made on the synthetic development of the social entrepreneurship institution through education and promotion mechanisms applicable in countries with similar socio-economic conditions.
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