CubeSat’s Deployable Solar Panel with Viscoelastic Multilayered Stiffener for Launch Vibration Attenuation

Table 4

LLSS test results of solar panels before and after full level vibration test.

Test	Solar panel	Status	1^st eigenfrequency (Hz)	Difference (%)
Sine vibration	w/o stiffener	Before	47.6	2.90
		After	46.2
	with 3 layers of stiffener	Before	58.5	3.41
		After	56.5
	with 5 layers of stiffener	Before	73.0	0.68
		After	73.5
Random vibration	w/o stiffener	Before	47.6	2.90
		After	46.2
	with 3 layers of stiffener	Before	58.5	3.42
		After	56.5
	with 5 layers of stiffener	Before	72.5	1.37
		After	73.5