Abstract—Synthetic aperture radar (SAR) antenna is suitable
for small satellite platform. It deforms easily in unfolded state by
the affection of the space thermal loads on orbit, which directly
reduces the precision of the antenna. The flatness error is an
important index to evaluate the thermal deformation of antenna
surface. In this paper, first a new flatness error evaluation
algorithm of plane in any space placement based on least square
method was proposed for accurate assessment of the satellite
antenna thermal deformation degree. Then the finite element
model of SAR antenna for thermal deformation analysis was
established and the measure points of the SAR antenna’s
measure surface was picked. Finally the antenna plate flatness
error was calculated based on the new evaluation algorithm and
the result of analysis. The flatness error of the satellite antenna
plate quantifies the degree of the satellite antenna deformation
and provides the basis for further design optimization of the
SAR antenna structure.
Index Terms—Flatness error evaluation, least square method,
satellite antenna, thermal deformation analysis.
Tengda Liu and Bingjie Wang are with School of Mechanical
Engineering and Automation, Beihang University, Beijing, China (e-mail:
ltd3907@163.com, wbjhu@ 163.com).
Chunjie Wang is with School of Mechanical Engineering and
Automation , Beihang University, Beijing, China. She is also with the State
Key Laboratory of Virtual Reality Technology and Systems, Beihang
University, Beijing, China (e-mail: wangcj@buaa.edu.cn).
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Cite: Tengda Liu, Chunjie Wang, and Bingjie Wang, "Flatness Error Evaluation of the Satellite Antenna," International Journal of Future Computer and Communication vol. 4, no. 4, pp. 262-265, 2015.
