提出了一种基于在轨姿态变化的光机热一体化集成分析方法，引入了在轨实时姿态机动参数，实时反映卫星相机瞬态的外热流及温度场低频动态变化过程。根据实时温度场数据进行在轨热变形分析，用热变形数据计算相机光轴指向进行动态变化情况分析，用光学系统动态调制传递函数（MTF）及光轴指向变化情况对相机成像质量进行评估。分析结果表明，高分辨率遥感卫星在轨姿态变化会导致相机外热流变化剧烈，外热流的变化使相机光机结构温度场发生变化，相机热稳定性能遭受严酷考验，温度水平波动和温度梯度造成的热应力使得光学系统产生热弹性变形及波面变化，严重影响成像质量。

A thermal/structural/optical integrated analysis method based on the changes of satellite attitude and orbit maneuver parameters is presented, which can reflect satellite camera transient heat flux and the temperature field of the low frequency dynamic process. Depending on the data of real-time temperature field, the real-time on-orbit thermal deformation is analyzed, and the camera optical axis direction of dynamic variation is calculated with thermal deformation data. The modulation transfer function (MTF) of the optical system and the dynamic optical axis direction changes are used to evaluate the image quality and the effect of the thermal control strategy. The analysis shows that attitude changes of high resolution remote sensing satellite cause external heat flux changes in its camera, which causes the temperature field changes of camera optical and mechanical structure. Thus, thermal stability of the camera suffers ordeal. Thermal stress caused by the temperature fluctuation and the temperature gradient makes the optical system to produce rigid body displacement and wave front aberration. As a result, the imaging quality is redused.