Technology Studying On The Deployable Large-Aperture Primary Mirror Of Space Optical Remote Sensor

With the constant improvement of space optical remote sensor resolution, space camera having long focal length and large aperture was developed, but these lager‐aperture space cameras are always difficult to either manufacture or launch. Therefore, deployable structure of large‐aperture space optical remote sensor is now being widely studied. The deployable idea is mainly about using structure design to enable the large‐aperture primary mirror to be segmented into piece, which can be furled during launching and deployed when it is on‐orbit. Based on the conclusion and analysis of existing technologies and missions, the primary designing rules and techniques of designing a deployable structure have been summarized in this paper and several research works have been done in the following aspects:1. The main designing criteria and technologies of representative missions were introduced, and the primary designing rules of the deployable structure has been summarized.2. Based on the existing practice, modularized designing method was introduced, including: segmentation design, driving design, precise location design, locking design and phase adjustment design. Designing principles and available technologies were suggested in order to build the basement of future design practice on the topic.3. Design practice was made aiming at the4‐m‐aperture primary mirror, key technologies has been developed. The design result has been simulated with finite element analysis software.4. Error analysis of the deployable primary mirror was done to determine themain error source, and adjustment structure has been designed to compensate the error.Experimental methods were also discussed and a few suggestion was made on thistopic.