Application of Stewart Platform in the Low-Frequency Vibration Characteristic Test of Space Truss Deployable Antenna on Satellite

Table 4

Test result of each measuring point in -direction.

Measuring point	-direction		Time (s)		Initial frequency (Hz)	Fundamental frequency (Hz)
	Amplitude (με)		Initial time	First peak time
S1	-29.7	33.5	21.31	87.4	0.4	4.02
S2	-45.7	42.6		110.6
S3	-45.4	83.2		94.4
S4	-129.4	161.7		88.4
S5	-48.4	78.7		95.3
S6	-365.1	255.7		93.7
S7	-167	276.9		94.0
S8	-298.2	98.8		93.6
S9	-39.3	33.8		93.9
S10	-109.7	215.9		93.8
S11	-21.8	23.4		94.0
S12	-47.2	17.3		93.9
Dynamic displacement			: -8.7 ~ 9.25 mm; : -4.6 ~ 4.6 mm; : -62.4 ~ 65.1 mm