Analytical and Experimental Study Using Output-Only Modal Testing for On-Orbit Satellite Appendages

Table 6

Damping ratios of test article under point excitation.

Mode	FRF PolyMax   (Ref.)   𝜉(%)	Operational   PolyMax  𝜉(%)	PULSE methods
			FDD  𝜉(%)	EFDD  𝜉(%)	SSI
					UPC  𝜉(%)	PC  𝜉(%)	CVA  𝜉(%)
1	0.95	1.86	—	0.76	1.85	1.36	2.0
2	0.21	0.44	—	0.26	1.87	2.51	2.23
3	0.08	0.02	—	0.59	0.20	0.19	0.19
4	0.34	0.74	—	1.96	1.60	1.96	1.95
5	0.27	0.02	—	0.29	0.23	0.21	0.22
6	0.22	0.11	—	0.37	0.26	0.36	0.29