航天器太阳翼在轨挠性振动测量中的无依托敏感技术

doi:10.7527/S1000-6893.2022.27644

Abstract

Abstract:

Based on the self-powered wireless accelerometers network， on-orbit flexible vibration measurement and parameter identification tests for the large solar array are carried out in the Tianhe core module and Wentian laboratory module of China space station in May 2021 and July 2022， respectively. Based on the requirements of the missions， the core capabilities of the unsupported sensing technology in the space exploration mission are summarized in this paper， including self-power supply and self-charging， data transmitted between unsupported sensors， highly reliable data acquisition， high-precision time synchronization， and autonomous sleep wake-up. The design ideas and implementation schemes of the above capabilities are described in detail， and the actual verification results of the unsupported sensor in the space station solar array vibration measurement task are given. On-orbit test results demonstrate the effectiveness and rationality of the proposed strategies.

Key words: space station, vibration measurement, unsupported sensing, self-power supply and self-charging, wireless acquisition, time synchronization, sleep strategy, on-orbit verification

CLC Number:

V417⁺.7

Yan LANG, He LIANG, Li YUAN, Jinjiang ZHANG, Chaoli GUO, Guoqi ZHANG, Tao YIN. Unsupported sensing technology of on⁃orbit vibration measurement of flexible spacecraft solar array[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(10): 327644-327644.

Figures/Tables 18

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References 21

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θ /（°）	T_acc/min	T_heat/min	使用模式
0	67.8	84.4	能量收支平衡时，每个轨道周期下充电能量可提供的加速度计最大工作时长为 58.7~67.8 min，锂电池加热最大时长为73.1~84.4 min
20	63.7	79.3
30	58.7	73.1
0	1 737	0	能量收支不平衡时，充电能量与锂电池能量之和可提供的加速度计单次连续最长工作时长为1 232~1 737 min
20	1 466	0
30	1 232	0

工况	锂电池参数	加计1	加计2	加计3	加计4
初入轨T₀	电压/mV	3 905	3 945	3 873	3 855
	电流/mA	500	510	520	510
	容量/%	68	71	66	64
T₀+1.5 h	电压/mV	4 087	4 095	4 063	4 049
	电流/mA	501	500	527	528
	容量/%	81	84	79	77
T₀+3 h	电压/mV	4 195	4 196	4 198	4 189
	电流/mA	327	264	368	454
	容量/%	91	93	91	89
T₀+5.3 h	电压/mV	4 201	4 201	4 201	4 201
	电流/mA	0	0	0	0
	容量/%	100	100	100	100

测量来源	频率1	频率2	频率3	频率4	频率5
加速度计1	0.168	0.21	0.295	0.326	0.347
加速度计2		0.21	0.295	0.337
加速度计3		0.21	0.295	0.337
加速度计4	0.158	0.21	0.295	0.326	0.358
陀螺		0.212	0.294	0.331

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Unsupported sensing technology of on⁃orbit vibration measurement of flexible spacecraft solar array

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