Research On Error Of Space-borne Parabolic Antenna Based On Thermal Deformation

This thesis puts space-borne parabolic antenna as the main research object, mainly studies from three aspects : Analysis of profile error caused by reflective surface temperature changes of space-borne parabolic antenna; Analysis of directional error caused by the temperature of space-borne parabolic antenna,and the study on regular which is the impact of Antenna Material on profile and directional error; Conducts a software platform for secondary development on parametric analysis of space-borne parabolic antenna.According to the analysis of thermal deformation of the reflective surface of space-borne parabolic antenna on the condition of sunlight during in-orbit operation,my research finds extreme conditions which has the maximum of the profile error in the whole year, analyzes that thermal deformation has influence on antenna in the extreme conditions.Taking advantage of existing calculation formula of the directional error of the reflective surface of antenna, my research finds extreme conditions which has the maximum of the directional error in the whole year,and analyzes the regular which is the impact of Antenna Material on profile and directional error according to the response surface methodology.For the problems of analysis on the parametric temperature field and deformation field of the space-borne parabolic antenna,my research conducts a software platform for secondary development on parametric analysis, preliminarily realized the Parametric.At present,the above problem is still not completely researched,because of this,my paper conducts a number of studies, elaborates the related theory and research methods.The work done has some engineering significance on the design of the thermal structure of space-borne parabolic antenna.