关键词: 星载天线, 型面精度, 优化调节, 模拟试验系统

Abstract: Surface accuracy is critical for the performance of satellite antennas. As the size increases, conventional passive thermal control methods for surface accuracy cannot satisfy the requirement of high precision and high resolution remote sensing satellites. An intelligent adjustment method is proposed in this article. To achieve the optimal surface accuracy, several actuators, whose displacement outputs are assigned by intelligent adjust algorithm, are installed on the back of antenna surface. Based on the surface adjustment simulation system, consisting of a heating system, a surface measuring system and a control system, an experiment under 50℃, 75℃ and gradient temperature is conducted respectively to adjust the deformation of antenna surface. The results show that after adjustment, the RMS error of antenna surface is reduced by more than 60% and blow 30μm, which provides a reference for the application of intelligent adjustment method in satellite engineering.

Key words: satellite antenna, surface accuracy, optimal adjustment, simulation system