量子科学实验卫星微振动地面测试与估计方法

Ground Measurement and Signal Estimation for Micro-vibration of Quantum Science Experimental Satellite

介绍了卫星微振动地面测试和信号估计方法.根据量子科学实验卫星特点,对动量轮运行状态下光学载荷的微振动线位移及角位移进行估计.通过地面微振动测试系统,测量了动量轮运行下光学载荷的微振动加速度;应用小波积分方法,精确估计了卫星结构敏感点的振动线位移和振动角位移.通过工程实测证明了微振动测试与估计方法的有效性.研究结果对于高精度科学实验卫星微振动地面试验具有一定工程应用意义.

In this paper, micro-vibration measurement and signal estimation on the Quantum Science Experimental Satellite ground test is introduced. Based on the technology requirement of the satellite, the method of measurement is determined to detect the vibration of high-accuracy optical payloads when the oscillation source comes from on-board rotatable instruments, such as reaction wheel installed in the satellite body. The characteristics of vibration transfer from a vibration source to sensitive points are estimated, and vibration displacement and angular oscillation are approximated by applying an integration wavelet. The validation of the proposed method is confirmed by experimental test, and the result is of interest in ground test of micro-vibration for Quantum Science Experimental satellite with high accuracy payloads.