摘要
高精度航天器由于其指向精度和分辨率水平极高,需要考虑微振动的影响。文章给出了微振动的定义,分析了微振动特性、国外研究现状、建模特点及方法,总结归纳了高精度航天器星体内部的主要扰动源。给出了反作用轮、斯特林低温制冷器、星载敏感器以及太阳翼等典型扰动源扰动的时域或频域模型及微振动隔离模型,并进行了相应的仿真,从系统层面评估了微振动对高精度航天器性能的影响,可供高精度航天器设计时参考。
The effect of jitter has to be considered for spacecraft with high pointing accuracy and resolution.The paper gives a definition of jitter,reviews the research progresses and the current state in this respect and analyzes its characteristics and the modeling method.Based on an analysis of jitter disturbance sources on-board,this paper focuses on problems of reaction wheel,Sterling cryocooler,space-borne sensor and solar wing stepping and thermal-induced vibration disturbance and discusses corresponding time or frequency domain models and the simulation for inputs to provide a reference for high resolution spacecraft design and performance evaluation from a system perspective.
出处
《航天器环境工程》
2009年第6期528-534,498,共7页
Spacecraft Environment Engineering
基金
中国空间技术研究院自主研发项目
关键词
高精度航天器
微振动
反作用轮组
动静不平衡
斯特林低温制冷器
敏感器
太阳翼
热颤振
功率谱密度
micro-precision spacecraft
jitter
reaction wheel assembly
dynamic imbalance
static imbalance
Sterling cryocooler
sensor
solar wing
thermal snap
power spectrum density
