TitleAnalysis of the umbrella-type reflector opening process on a stand with an active gravity compensation system
AuthorsA.V. Ivanov, S.A. Zommer
OrganizationJSC «Academician M. F. Reshetnev» Information Satellite Systems»
Zheleznogorsk, Krasnoyarsk region, Russian Federation
AbstractDuring the verification of the functioning of the transformed structures in ground conditions, it is necessary to minimize the effect of gravity in order to exclude the occurrence of additional loads on the hinge assemblies and opening mechanisms. To perform this task, when testing a transformable umbrella-type reflector, stands with an active gravity compensation system are used, in which the gravity compensation force is applied to each spoke of the reflector. However, when compensating for the gravity spokes of the reflector, the fixing point of the suspension cable does not coincide with the center of mass of the spoke, which leads to the appearance of additional moments of forces acting on the suspended structure. Therefore, as an object of research, a part of the reflector was considered, consisting of a spoke, with cords of a formforming structure attached to it and a mesh. A 3D model has been developed, using which the positions of the center of mass of the structure under consideration were determined in the key phases of the reflector opening. A computational analysis of the driving forces and moments acting on the structure in the process of disclosure is carried out. The degree of influence of the suspension point position on the inaccuracy of gravity compensation has been established. The results of the analysis presented in the article can be used as initial data for the development of an algorithm for the operation of an active gravity compensation system, which will be able to take into account the position of the suspension point and the center of mass of the structure relative to the axis of rotation of the spoke during the opening of the reflector, by changing the gravity compensation force.
Keywordslarge-size transformable reflector, ground experimental study, gravity compensation system, center of mass.
 Ponomarev S. V. Transformiruemye reflektory antenn kosmicheskikh apparatov [Transformable reflectors of spacecraft antennas] // Tomsk State University Journal of Mathematics and Mechanics, 2011, no. 4 (16), pp. 110–119. (In Russian)
 Im E., Thomson M., Fang H., Pearson J., Moore J., Lin J. Prospects of Large Deployable Reflector Antennas for a New Generation of Geostationary Doppler Weather Radar Satellites // American Institute of Aeronautics and Astronautics, 2007. doi: 10.2514/6.2007-9917.
 Fang H., Im E. Mechanical Technology Development on A 35-m Deployable Radar Antenna for Monitoring Hurricanes // NASA ESTO B6P2, Earth Science Technology Conference 2006, Adelphi, Maryland, 2006, 6 p.
 Chodimella S., Moore J., Otto J., Fang H. Design Evaluation of a Large Aperture Deployable Antenna // 47th AI-AA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Newport, Rhode Island, 2006. doi: 10.2514/6.2006-1603.
 Malyshenko A. M., Majkov S. A. Metodika opredeleniya otnositel'nykh energozatrat privoda raskrytiya reflektora antenny zontichnogo tipa pri nazemnykh ego ispytaniyakh na stende s aktivnoy sistemoy obezveshivaniya [Methodology of relative energy usage evaluation for an opening drive of umbrella-type reflector antenna at ground tests on active gravity compensation system] // TUSUR reports, 2018, no. 4, pp.123–129. (In Russian)
 Lopatin A. V., Rutkovskaya M. A. Obzor konstruktsiy sovremennykh transformiruemykh kosmicheskikh antenn (chast' 1) [The review of designs of modern transformed space antennas (part 1)] // Siberian Aerospace Journal, 2007, no. 2, pp. 51–57. (In Russian)
 Mihalkin V. M., Perminov M. D., Romanenko I. V. Dinamicheskiy raschet sistemy obezveshivaniya spitsy krupnogabaritnogo transformiruemogo reflektora [Dynamic computation of foldable reflector rib zero gravity system] // Reshetnev readings : materials of the XV International scientific-practical conference, Krasnoyarsk, 2011, Part 1, pp. 81–82. (In Russian)
 Verkhoglyad A. G., Makarov S. N., Mikhalkin V. M., Stupak M. F., Shevlyakov A. V. Avtomaticheskaya sistema obezveshivaniya krupnogabaritnykh transformiruemykh konstruktsiy pri raskrytii [Automatic gravity compensation system for large-size transformable constructions during deployment] // Journal of Instrument Engineering, 2016, vol. 59, no. 2, pp. 134–142. (In Russian)
 Romanenko I. V. Uluchshenie metodiki ispytaniy mekhanicheskikh sistem kosmicheskikh apparatov [Improving the testing methods of mechanical systems of spacecraft] // «Trudy MAI» journal, 2015, no. 80, p. 4. (In Russian)
 Kiriljuk A. I., Podzorov V. N., Evteev A. N. Stend dlya obezveshivaniya gorizontal'no peremeshchayushcheysya mekhanicheskoy sistemy kosmicheskogo apparata [Test bench to make spacecraft mechanical system weightless]. Patent RU 2372601, 2009, bulletin no. 31.
 Drozdov A. A., Agashkin S. V., Mikhnev M. M., Ushakov A. R. Ustroystvo imitatsii nevesomosti mekhanizmov s gibkoy konstruktsiey elementov [Device of mechanism weightlessness simulation with flexible structure of elements]. Patent RU 2334970, 2008, bulletin no. 27.
 Kudrjavtsev I. A. Sposob imitatsii ponizhennoy gravitatsii [Method of simulating low gravity]. Patent RU 2410299, 2011, bulletin no. 3.
 Apparatus for antenna weightlessness develoypment test. Patent US 2014/0041444, 2014.
 Testoedov N. A., Khalimanovich V. I., Shipilov G. V., Romanenko A. V., Shal'kov V. V., Velichko A. I., Akchurin V. P. Razvertyvaemyy krupnogabaritnyy reflektor kosmicheskogo apparata [Space vehicle deployable bulky reflector]. Patent RU 2350519, 2019, bulletin no. 9.
 Shevlyakov A. V., Kuklin V. A., Kholodov V. V. Mnogokanal'naya avtomaticheskaya sistema obezveshivaniya krupnogabaritnykh transformiruemykh sistem [Multi-channel automatic system of a weight compensation of largesize transformed devices] // Reshetnev readings : materials of the XVIII International scientific-practical conference, Krasnoyarsk, 2014, part 1, pp. 113–115. (In Russian)
For citing this articleIvanov A.V., Zommer S.A. Analysis of the umbrella-type reflector opening process on a stand with an active gravity compensation system // Spacecrafts & Technologies, 2021, vol. 5, no. 4, pp. 208-216. doi: 10.26732/j.st.2021.4.04
This Article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).