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设计了基于音圈电机(VCM)和压电陶瓷(PZT)快速倾斜镜(FSM)的双级振动模拟系统,用于模拟光通信中机载平台对光束的扰动。振动模拟系统结合了VCM和PZT的优点,使得模拟系统角度分辨率为1μrad,在不经过光路的放大或压缩的情况下,光束振动幅度为124mrad。验证结果表明,系统模拟的美国Altair无人机振动功率谱密度函数与其输入的无人机功率谱密度函数的相关系数为0.93,真实再现了机载平台的振动特性。机载振动模拟系统的构建为后期光通信中跟踪控制系统的设计与优化奠定了基础。
A two-stage vibration simulation system based on voice coil motor (VCM) and piezo-ceramic (PZT) fast tilt mirror (FSM) was designed to simulate the disturbance of light beams by airborne platforms in optical communication. Vibration simulation system combines the advantages of VCM and PZT, making the analog system angular resolution of 1μrad, without amplification or compression of the optical path, the beam amplitude of 124mrad. The verification results show that the correlation coefficient between the power spectral density function of UTA and the input power spectral density function of the UAV is 0.93, which truly reproduces the vibration characteristics of airborne platform. The establishment of airborne vibration simulation system lays the foundation for the design and optimization of tracking control system in the later optical communication.