Study on microvibration effect of an optical satellite based on the imaging absence method

Abstract

High-accuracy optical satellites may be severely impacted by microvibrations. We propose a simulation and measurement method without an image criterion to evaluate microvibrations that is characterized by low cost and early intervention in a satellite project schedule. First, the relation between image shift value and image quality is identified. Second, frequency response analysis and an optical amplification coefficient are adopted to bridge the relation between mirror assembly displacement and the triggered pixel displacement of the focal plane. Then the close-loop simulation is carried out. Next, the image absence microvibration experiment is conducted. Finally, the disturbance effect is examined using an imaging method and on-orbit test as the contrast experiments. Results indicate that the proposed method has good precision and enables close-loop microvibration analysis without an image as a critical criterion.