Rigid-flexible-thermal coupling dynamic modeling a satellite-solarpanels system in low earth orbit

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (6) : 38-43.

ZUO Yashuai,LIU Jinyang

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Abstract

In the conventional dynamic modeling for satellite-solar panels systems,for considering the thermal effect,only the heat flux by direct solar radiation is taken into account,which cannot be extended to satellite-solar panels systems in low earth orbit.In the paper,a general modeling method for analyzing the rigid-flexible-thermal coupling dynamic performance of a satellite-solar panels system in low earth orbits was proposed.The expressions for the heat flux of direct solar radiation,earth infrared radiation and reflected solar radiation by the earth were derived considering the coupling relationship among the thermally induced deformation of panels,attitude motion of satellite and the heat flux caused by different kinds of thermal radiations.Assuming the satellite-solar panels system as a hub-beam multibody system,the heat conductive equation of a cantilevered beam was derived,and then by leading in the thermal stress-strain relationship,dynamic equations of the satellite-solar panels system were obtained based on the principle of virtual work.The heat conductive equation and the dynamic equations were solved simultaneously.A simulation analysis of the satellite-solar panels system was carried out to show the influences of the earth infrared radiation and reflected solar radiation by the earth on the thermally induced vibration.In addition,the influence of considering the rigid-flexible-thermal coupling effect on the dynamic performance of the flexible multibody system was revealed.Finally,the stable regions of some parameters affecting the thermally induced vibration were given.

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ZUO Yashuai,LIU Jinyang. Rigid-flexible-thermal coupling dynamic modeling a satellite-solarpanels system in low earth orbit[J]. Journal of Vibration and Shock, 2017, 36(6): 38-43

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