Structural Design And Optimization Of Space Camera

Multi-spectral camera is one of the most valuable instruments which can belaunched into space. It is acquired by recording the response characteristics of theobserved object on earth in multiple spectral bands, with more information about theobserved object contained, multi-spectral camera has been widely used in a largenumber of applications.In this paper, the multi-spectral CCD camera with4spectrum bands, usingoff-axis TMA optical system is researched, it is connected with the panchromaticcamera which is carried by a small satellite, to accomplish the task of investigating theearth together. With the same field angle of the multi-spectral camera and thepanchromatic camera, high-resolution multi-spectral images can be got by fusionprocessing of multi-spectral and panchromatic images through post treatment. In thisdissertation, the following research works have been completed:(1) Introduce the multi-spectral space camera in composing, its present home andabroad development situation and development trend. Main mechanical analysiscontent of multi-spectral camera is described and the evaluation standard of reflectorsurface deformation is introduced.(2) Main parameters and structural composition of the multi-spectral spacecamera are described and static analysis has done, the result shows that the reflectorsmeet the reflector surface deformation requirement with gravity load or temperatureload.(3) Modal analysis of the multi-spectral space camera has done to obtain thenatural frequencies and mode shapes, dynamic responses of the structure underlow-frequency sinusoidal vibration loading or random vibration loading are obtained,the results show that the structure has good stability and reliability.(4) The main supporting structure is designed with topology optimization method,the computational results show that in the condition of gravity load or temperatureload, the topology structure meets the reflector surface deformation requirement, atthe same time, the topology structure is lighter and the dynamic performance is betterthan the former structure.