国防科技大学学报2017，Vol.39Issue(3)：7-14,8.DOI:10.11887/j.cn.201703002
重力梯度对超大柔性空间结构在轨动力学特性的影响
Effect of gravity gradient on dynamical characteristics of very large flexible space structures in orbit
摘要
Abstract
Space solar power station is a kind of space structure with large size and high flexibility.It is far larger than the previous spacecraft in size,which results in new phenomena and new problems on the study of dynamical characteristics.The kilometer-scale dumbbell model was studied.The Hamilton's dynamical model on orbit was established under the effect of gravity gradient.The symplectic Runge-Kutta method was used with different combinations of parametrical values to obtain dynamical responses.By comparing the simulation results,the quantitative relationships were determined respectively between the size of space structure and the effect of gravity gradient on orbital motion and attitude motion.It is found that:due to the gravity gradient,the coupling phenomenon between attitude motion and elastic vibration occurs;the attitude motion has great influence on the external envelope curve of elastic vibration response,while the period of it is changed by elastic vibration.关键词
空间太阳能电站/超大柔性空间结构/Hamilton方程/哑铃模型/重力梯度/耦合Key words
space solar power station/very large flexible space structure/Hamilton equation/dumbbell model/gravity gradient/coupling分类
航空航天引用本文复制引用
穆瑞楠,谭述君,吴志刚..重力梯度对超大柔性空间结构在轨动力学特性的影响[J].国防科技大学学报,2017,39(3):7-14,8.基金项目
国家自然科学基金资助项目(11572069,11372056,11432010,11502040) （11572069,11372056,11432010,11502040）
