DOI 10.17586/0021-3454-2023-66-6-472-482
UDC 681.2-2,62-293, 53.08, 629.78
ROTARY COMPLEX FOR DYNAMIC VIBRATION TESTING OF NANOSATELLITES
Amur State University, Laboratory of Small spacecraft of the K.E. Tsiolkovsky Scientific and Educational Center;
D. V. Fomin
Amur State University, Faculty of Engineering Physics, Scientific-Training Center; Associate Professor, Director
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Abstract. Dynamic vibration testing is an important component of small spacecraft ground testing program. As a rule, nanosatellites are placed on the desktop of vibration stands by means of simulators of a transport and launch container (STPC). Results of modernization of the simulator of transport-launch container statically fixed on the table of the vibrating stand, as well as of the rotary complex, which includes the modernized STPC, are presented. For both structures, model dynamic vibration studies are carried out in SolidWorks CAD. For a statically fixed STPC, the maximum amount of the resonating mass of the structure is 0,048 % over the entire range of specified frequencies, the deformations are close to zero, while for the modernized STPC with a rotary device, the resonating mass is 0,27 %, and the deformations of the nodes complex – 0,09 mm. For the base of the rotary device, static deformations are studied separately; using numerical simulation, a value of 0,057 mm is obtained, and in full-scale tests – 0,052 mm, which indicates a high factor of the structure safety. The modernized STPC with a rotary device, fixed on the table of the shaker, has a greater resonant mass and deformation than the statically fixed STPC, however, the values of these parameters lie within the acceptable limits according to GOST 30630.0.0-99 (p. 6), which allows the operation of the designed rotary complex for nanosatellites dynamic vibration testing. Application of the complex makes it possible to replace expensive vibration stands that create dynamic vibration loads in two or more independent planes, since it can be used on vibration stands that create vibrations in only one direction.
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