PURPOSE: To realize an accurate ground simulation test by unfolding the titled device in nearly orthogonal directions so as to be guided by a first supporting means by extendedly driving a first and a second mast members, and at the same time by unfolding or folding it so as to be two-dimensionally guided by a second supporting means is a suspended condition.

CONSTITUTION: A first and a second guide parts 21, 22, which support a first and a second mast members 11, 12 of a solar paddle so as to be freely guided in nearly orthogonal driving directions respectively, are provided; and opposite thereto, a panel supporting part 25, which suspendedly supports and guides the solar battery panel making the fulcrum of nearly the center of the connecting part on one side corresponding to the row direction of the blanket 10a of the solar battery panel 10 and to the line direction nearly orthogonal thereto, is provided. And both the mast members 11, 12 are guided by the guide parts 21, 22 in nearly orthogonal directions so as to be unfoldedly or foldedly driven, and at the same time, the solar battery panel 10 is two-dimensionally guided in such a condition that it is suspended by wires 29 to a panel supporting part 25, so that it can be unfolded or folded. Thus, the unfolding and folding action can be simulated nearly in the same manner as the action in the gravity-free environment.