Encapsulation Based Method for Natural Frequency Identification of Deployable Solar Arrays with Multiple Plates

Table 3

Natural frequencies of the twofold solar array in the vertical direction.

Suspension stiffness ky (N·mm^−1)	First-order natural frequency in the vertical direction
	Test value (Hz)	Relative error of test (%)	Corrected value of mathematical model (Hz)	Corrected relative error (%)
0.0 100	3.5 211	−2.03	3.6 160	0.61
0.0 980	3.7 884	5.40	3.5 921	0.06
0.1 935	4.0 536	12.78	3.5 599	−0.95
0.2 856	4.3 000	19.64	3.5 365	−1.61
0.3 750	4.5 300	26.04	3.5 186	−2.10
0.4 610	4.7 475	32.09	3.5 113	−2.31