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航天光学遥感器在轨运行时的环境与地面装调时有很大差异,对于采用复合材料的遥感器而言,在轨运行时由于材料受湿气解析的影响其几何尺寸将发生变化,进而影响遥感器的成像质量。因此,模拟在轨环境下复合材料几何尺寸稳定性测试,分析其在轨条件下的几何尺寸变形是十分必要的。提出了一种在热真空环境下,采用激光双频干涉原理对复合材料几何尺寸变形量的高精度测试方法,对该方法进行了方案验证与精度分析。针对采用碳纤维蒙皮/铝蜂窝夹层结构复合材料的某相机前镜筒进行了实际的热真空环境下几何尺寸变形量测试。结果表明,试验数据与理论数值在数量级上相同,提出的测试方案可行,为复合材料模拟在轨环境下几何尺寸变形量提供了一种测试手段。
Aerospace optical remote sensor in orbit operation environment and ground installation are very different, for the use of composite remote sensor, the orbit operation due to the material by the impact of moisture analysis of its geometry will change, and thus Affect the remote sensor’s imaging quality. Therefore, it is necessary to simulate the geometric stability of composites under the orbital environment and analyze the geometric deformation under the orbital conditions. A high-precision testing method of laser beam double-frequency interference on the geometric deformation of the composite was proposed in this paper under the condition of thermal vacuum. The scheme verification and accuracy analysis were carried out. Aiming at the front lens barrel of a camera with carbon fiber skin / aluminum honeycomb sandwich structure structure, the actual geometric deformation under thermal vacuum environment was tested. The experimental results show that the experimental data are in the same order of magnitude as the theoretical ones, and the proposed test scheme is feasible. It provides a test method for the deformation of geometrical dimension of composite materials in orbit environment.