| Popis: |
As the temperature adaptation effects the design process of a large aperture mirror assembly seriously,this paper researches the influence mechanism of temperature on the large aperture mirror assembly and discusses the necessity of temperature adaptation analysis and test.With the design flow of the large aperture mirror assembly given,the temperature adaptation analysis method is summarized.The physical calculation model of the large aperture mirror assembly is constructed by Finite Element Method(FEM).The final design status is confirmed after structural-thermal optimization.The temperature adaptation of the optimal design is analyzed in the orbit environment and on the ground environment.The results indicate that the temperature adaptation in the orbit environment is at the range of±4℃ and the temperature distribution demands are 5℃,4℃ and 7℃in X,Y,Zdirections,respectively.Moreover,the temperature adaptation on the ground environment is at the range of±3℃,and the temperature distribution demands are 4℃,3℃ and 4℃in X,Y,Zdirections,respectively.The temperature adaptation test of temperature uniform change for the assemblies is performed,and compared with the test results of the corresponding analysis results.It shows thatthe PV value error is in 4% and the RMS value error is in 7% within a±5℃temperature range. |
