大型空间环形桁架天线反射器展开动力学模拟与实验研究
发布时间：2018-09-17 12:47
【摘要】：近年来,可展开环形桁架天线被广泛应用于航天领域,将其作为提升通信卫星水平的关键技术.环形桁架式天线反射器可以看作是由可展开环形桁架和柔性索网反射器组成的复杂刚-柔耦合多体系统.为了精确表征柔性构件发生的大转动、大变形运动特性,本文采用结合绝对节点坐标方法(ANCF)与自然坐标方法(NCF)的绝对坐标(ACB)方法对该系统进行建模.为了提高天线展开动力学模拟的计算效率,文中提出基于静力缩聚法和多层区域分解方法的并行求解算法实现大规模刚-柔多体系统动力学方程的高效求解.此外,为了精确反映反射器不同步展开现象,在展开动力学模型中考虑驱动力衰减的影响.最后,基于上述方法对环形桁架天线反射器展开的第二阶段进行动力学分析,并通过4 m缩比环形桁架天线地面实验验证数值模拟的结果.
[Abstract]:In recent years, deployable ring truss antennas have been widely used in the aerospace field as the key technology to improve the level of communication satellites. The loop truss antenna reflector can be regarded as a complex rigid-flexible coupling multi-body system composed of deployable ring truss and flexible cable mesh reflector. In order to accurately characterize the large rotation and large deformation motion characteristics of flexible members, this paper uses the absolute coordinate (ACB) method combined with the absolute node coordinate method (ANCF) and the natural coordinate method (NCF) to model the system. In order to improve the computational efficiency of antenna deployment dynamics simulation, a parallel algorithm based on static condensation method and multilayer domain decomposition method is proposed to efficiently solve the dynamic equations of large scale rigid-flexible multibody systems. In addition, in order to accurately reflect the phenomenon of non-synchronous expansion of reflector, the influence of driving force attenuation is considered in the dynamic model of expansion. Finally, based on the above method, the dynamic analysis of the second stage of the expansion of the reflector of the annular truss antenna is carried out, and the numerical simulation results are verified by the experiments on the ground of the 4 m scale annular truss antenna.
【作者单位】： 北京理工大学宇航学院;中国空间技术研究院西安分院;
【基金】：国家自然科学基金(编号:11290151)资助项目
【分类号】：TN820.84
本文编号：2245970
[Abstract]:In recent years, deployable ring truss antennas have been widely used in the aerospace field as the key technology to improve the level of communication satellites. The loop truss antenna reflector can be regarded as a complex rigid-flexible coupling multi-body system composed of deployable ring truss and flexible cable mesh reflector. In order to accurately characterize the large rotation and large deformation motion characteristics of flexible members, this paper uses the absolute coordinate (ACB) method combined with the absolute node coordinate method (ANCF) and the natural coordinate method (NCF) to model the system. In order to improve the computational efficiency of antenna deployment dynamics simulation, a parallel algorithm based on static condensation method and multilayer domain decomposition method is proposed to efficiently solve the dynamic equations of large scale rigid-flexible multibody systems. In addition, in order to accurately reflect the phenomenon of non-synchronous expansion of reflector, the influence of driving force attenuation is considered in the dynamic model of expansion. Finally, based on the above method, the dynamic analysis of the second stage of the expansion of the reflector of the annular truss antenna is carried out, and the numerical simulation results are verified by the experiments on the ground of the 4 m scale annular truss antenna.
【作者单位】： 北京理工大学宇航学院;中国空间技术研究院西安分院;
【基金】：国家自然科学基金(编号:11290151)资助项目
【分类号】：TN820.84
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