空间控制技术与应用2017，Vol.43Issue(1)：11-16,6.DOI:10.3969/j.issn.1674-1579.2017.01.002
挠性空间结构的密集模态特性及影响分析
An Analysis on Characteristics and Impacts of Close Modes in Flexible Space Structures
摘要
Abstract
Along with spacecraft growing complex,flexible space structures such as large solar panels and large deployable antenna are often applied.To achieve ideal attitude performance and antenna pointing accuracy,vibration control receives much attention.It is worth noticing that flexible space structures often possess close modes at low frequency,which potentially poses problems for the vibration control system.Characteristics and impacts of close modes must be taken into consideration in object modelling,actuators/sensors placement and controller design.In this paper,the reason for modal instability of close modes is first deduced,followed by the proof of model uncertainty caused by this modal instability.Then,based on the singular values of controllability Grammian,the particularity on the controllability of close modes is analyzed.Moreover,the spillover disturbance is demonstrated to show the impact of close modes further.Based on these characteristics,suggestions for vibration control of structures with close modes are proposed,which offers important reference value to on-orbit vibration control of flexible space structures.关键词
密集模态/模态不稳定/低可控度/溢出问题Key words
close modes/modal instability/low controllability/spillover分类
航空航天引用本文复制引用
刘潇翔,石恒,王思野..挠性空间结构的密集模态特性及影响分析[J].空间控制技术与应用,2017,43(1):11-16,6.基金项目
国家自然科学基金资助项目(61304037). （61304037）
