动量轮扰振对成像质量影响的全路径分析

Full Path Analysis of Momentum Wheel Jitter Effect on Imaging Quality

遥感卫星分辨率的不断提高使动量轮扰振对遥感成像的影响成为总体设计须要考虑的因素,由于扰振源到光学系统间的传力途径比较复杂,孤立地分析卫星某个子系统造成的误差相对比较大。为了作出较为准确的分析,文章建立了干扰源模型、卫星-相机结构模型、控制系统模型和相机光学系统模型,从工程上确立了从扰振源到光学系统的全路径分析链,并以某卫星型号为例,系统地评估了动量轮扰振对成像质量造成的影响。此方法也为其它扰振源的分析提供参考。

With the development of remote sensing satellite, the jitter of momentum wheel has more and more influence on the imaging quality. As the force transmission between the vibration source and the optical system is complex, an isolated analysis of a subsystem of the satellite may cause bigger error. To get exact data, this paper creates a vibration model, a satellite-camera structural model ,a control model and an optical model. They come into being a full path of engi- neering analysis chain. Taking a satellite for example, this paper systematically evaluates the im- pact of momentum wheel jitter on the imaging quality. This method can aslo be used to analysis other vibration source.