Design of Aluminum Honeycomb Sandwich Main Bearing Plate for Coaxial Space Camera
A lightweight main bearing plate with aluminum honeycomb sandwich structure was designed for a cer-tain coaxial space camera.The honeycomb sandwich structure was improved from the aspects of reinforcement meas-ures and inserts,while the upper and lower panels were made of M40J carbon fiber composite material with the laye-ring sequence of[0°/45°/90°/-45°]s,and the configuration of aluminum honeycomb core was 3×0.05mm,the de-sign weight of the main bearing plate proposed was 3.98kg.The equivalent modeling method of honeycomb sandwich structure based on orthogonal anisotropic solid elements was adopted,the aluminum honeycomb core was equivalent to the'interlayer'.The simulation results reveal that the relative eccentricity between primary and secondary mirrors under main working conditions does not exceed 9.904μm,and the relative rotation angle does not exceed 4.708",the corresponding minimum modulation transfer function of the camera is 0.252,which is only 2%lower than the designed value,while the first-order fundamental frequency reaches 94.4Hz,both the static and dynamic characteris-tics meet the design requirements for visible band remote sensors.
space opticshoneycomb sandwich structuremain bearing plateequivalent modeling methodspace environment adaptability
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