建立了一种包括干扰模型、结构模型、光学模型及采样成像模型的时域集成分析方法,实现了空间相机从微振动干扰输入到图像输出的端到端系统集成仿真,并开发了基于MATLAB的数据转换工具,实现了结构分析与光学分析之间的序列数据传递。以某空间相机的地面微振动实验为例进行了时域集成分析,结果表明:在两种不同的成像模式工况下,该相机的动态像移统计最大值分别达到0.42 pixel和0.27 pixel,采样成像仿真得到的图像调制传递函数下降因子分别为0.951和0.974,与原始图像无明显的直观差异,为该相机微振动影响的有效预估提供了依据。

We develop an integrated analysis process on time domain comprising models of disturbances, structures, optical systems, and sampled imaging, and realize the end-to-end system integrated simulation of the space camera from micro-vibration disturbance input to imaging output. Accordingly, a data-transforming toolkit is developed in MATLAB for transferring the structural analysis results to the optical analysis software. The integrated time-domain analysis is carried out in the ground micro-vibration tests of a space camera. The analysis results denote that: under load conditions of two different imaging modes, the maximum statistical values of the dynamic image motions of the camera are 0.42 pixel and 0.27 pixel, respectively; the descending factors of the modulation transfer function of images from the sampled-imaging simulations are 0.951 and 0.974, respectively, which have no obviously visual difference compared with that of original images. These results provide a guidance for the effective prediction of the micro-vibration influence of the space camera.