复杂结构充液航天器晃动动力学与姿态稳定性

复杂充液航天器的晃动及其对控制系统的影响是当前空间高技术的重要问题。 本文首先由力学变分原理导出充液复杂系统的方程式,其中包括流体力学方程和相应的边界条件,以及弹性连续介质力学方程;特别是,考虑了强毛细作用力的影响。其次,考查了微重条件下带有隔板的贮箱内的液体晃动、带有网孔隔板腔体内的液体晃动和粘弹性隔板对抑制晃动的作用。另外,本文将分析带有多腔充液自旋卫星的姿态稳定性,以及晃动、液体涡旋、贮箱偏置,能量耗散和哥氏加速度对卫星运动的影响。最后,讨论了多体系统充液挠性空间飞行器的稳定性问题。 同时,本文给出了数值计算结果和某些试验结果,并与理论分析作了对比。

ON THE SLOSHING DYNAMICS AND ATTITUDE STABI- LITY OF LIQUID-FILLED SPACECRAFT WITH COMPLEX STRUCTURES

Sloshing of Complex Liquid-filled spacecraft and its influence on the control systems are the recently significant problem in the space technology. In this paper, first, from the variatical principle of mechanics can be derived the equations of complex System filled with liquid, including the equations of hydrodynamics and the equations of elastic-continuous medium mechanics with the corresponding boundary conditions; especially, the strong capillary effects are taken into account. And then, will be investigated liguid sloshing in the container with netted-hole spacers and the effects of viscous-elastic spacers, baffling liquid sloshing. Third, will be analyzed attitude stability of the spinning liquid-filled satellite with multi-cavity and the influence of sloshing, vortex of liquid, off-centre tanks, energy dissipation and Coriolis acceleration, on the motion of satellite. Finally, it is considered that the stability of flexible spacecraft with liquid-filled multi-body system. Furhermore, the paper presents the numerical data and some experimental results to be com-pated with the conclusion of theoretical analysis.