Optimization of mistuning for vibration localization reduction and control system improvement in a mistuned space-borne antenna
HE Erming1， NIE Liang1， MA Xiao-fei2， XU Hong-ying1
1. School of Aeronautics, Northwestern Polytechnical University, Xian, 710072, China;
2. CAST-Xi'an Institute of Space Radio Technology, Xian, 710100, China
To suppress the vibration localization and improve the vibration control system of mistuned space-borne antenna structure, a single rib multi-freedom lumped parameter model of radial rib antenna was established in this paper. Firstly, a mode localization factor for measuring the overall quality of structural vibration mode was proposed. Secondly, the influence of the certain mistuned ribs arrangements of the antenna on the overall structural vibration mode was studied. Finally, the problem of optimal design of the mistuned ribs arrangement was investigated by the genetic algorithm (GA), and the effect of optimization of the mistuned ribs arrangement on enhancing the performance of vibration control system was assessed. The results show that: for a group of certain random mistuned ribs, the optimal or approximate optimal mistuned ribs arrangement can be quickly and accurately obtained by the genetic algorithm and mode localization factor proposed in this paper, and the optimal mistuned ribs arrangement can not only greatly improve overall quality of structural vibration mode, reducing the structural vibration response, but also improve the efficiency of the vibration control system of the antenna.
贺尔铭1，聂良1，马小飞2, 徐宏英1. 抑制失谐星载天线振动局部化的失谐优化及控制改善[J]. 振动与冲击, 2017, 36(10): 45-50.
HE Erming1， NIE Liang1， MA Xiao-fei2， XU Hong-ying1. Optimization of mistuning for vibration localization reduction and control system improvement in a mistuned space-borne antenna. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(10): 45-50.
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