2m主镜主动支撑优化设计

结合某空间光学系统的任务需求，对其2m口径主镜的支撑难点作了详细的论述。为了使主镜达到光学设计所要求的面形精度，运用了结构有限元法和优化设计方法对主镜进行了支撑位置优化；并分别针对主镜轴向1 g 重力载荷、轴向1 g 重力载荷耦合1℃均匀温升两种工况，以主镜镜面RMS 为目标函数、力驱动器驱动力为优化变量进行了多参数优化。通过优化获得了最佳的驱动力组合，镜面RMS 分别达到19 nm、43 nm。该方法具有一定的应用价值。

Optimum design of active supporting system for a 2 m primary mirror

Based on a space optical system launch mission, the supporting radius of the 2 m primary mirror of the optical system subject to axial 1 g inertial load was optimized to achieve the minimum surface deformation. Taking surface error of the primary mirror as objective function and force actuator inputs as design variables, a mathematical model coupling finite element analysis and optimization algorithms was build. The optimum force actuator inputs of the primary mirror were investigated with the optimization model under axial 1 g inertial load condition and axial 1 g inertial load coupled with 1℃ temperature load condition, and the surface RMS of the primary mirror with optimum force actuator inputs are 19 nm and 43 nm respectively. It shows that the optimization method of primary mirror with active supporting system discussed in this paper is applicable.