Three kinds of simulation conditions were designed to study the high stability index assignment of a spaceborne SAR antenna according to the practical environment of the antenna on orbit.By analyzing the SAR antenna with the multi-body dynamics software ADAMS, the pointing accuracy was rationally allocated by the probabilistic method.The results show that the influence of disturbances on the pointing accuracy of the SAR antenna is greater if the disturbing load is acting on the area closer to the antenna.And the order of their influence degree is as follows: vibration isolator disturbance, CMG disturbance and SADA disturbance.The influence degree of the three angles on the pointing accuracy of the antenna is in the following order: pitch angle, direction angle, and distance angle.Improve the performance of the vibration isolator, reduce the effect of the payload disturbance on the pointing accuracy and improve the pitch angle control in the process of switching between various imaging modes, the SAR satellite antenna will be able to improve the SAR satellite image quality and help the satellite overall to select the adjustable posture institution.
收稿日期: 2017-04-13
出版日期: 2018-09-15
引用本文:
范亮,高晶波,王聪 . 星载SAR天线高稳定度指标分配方法研究[J]. 振动与冲击, 2018, 37(18): 170-176.
FAN Liang GAO Jingbo WANG Cong . Assignment method for the high stability index of a spaceborne SAR antenna. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(18): 170-176.
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