212 results about "Solar sail" patented technology

The invention relates to the field of spaceflight and discloses a controllably and orderly inflated self-supporting type solar sail structure. A sail surface approximately triangle-shaped and formed by three curves is adopted, the sail surface can be unfolded in orbit stably and orderly, and distribution gradient of internal plane stress forced on the sail surface after unfolding is reduced by 20%; a support ring with the inner diameter equal to a winding shaft is arranged at the position of rectangular vertice of the sail surface, and concentrated stress of the sail surface can be lowered; a circular opening enclosed by 4n (n is larger than or equal to 3, and n is an integer) sawteeth, and no relative movement between the vertice of the sail surface and the winding shaft can be guaranteed; four sets of inflated extension arms used for supporting the sail surface are unfolded, each set is formed by two extension arms, straightness of the inflated extension arms and rigidity of the inflated extension arms after being unfolded can be improved, the rigidity of the structure is two times of that of a structure with a single extension arm, and unfolding stability of the extension arms is improved.

Disclosed is a solar sail structure finite element modeling and post-processing method. The solar sail structure finite element modeling and post-processing method includes: 1), setting a solar sail configuration mode and a connecting format of a support arm and a sail surface and reserving an area for the support arm; 2), establishing a solar-sail geometric model with the preserved area; 3), setting a support arm model and generating a support-arm geometric model in the reserved area; 4), establishing finite element models of the solar sail surface and the support arm; 5), subjecting the solar sail surface and the support arm to finite element mode assembly according to the generated infinite element models of the solar sail surface and the support arm; 6), setting statics boundary conditions and loading conditions on the finite element models; 7), calculating buckling load of the support arm, simulating reverse acceleration speed released by the inertia, and exerting the reverse acceleration speed on the infinite element models; 8), analyzing statics of a solar sail to acquire maximum deformation and axial pressure of the support arm; 9), calculating buckling safety factors and structuring feasibility of a solar sail structural scheme according to the buckling safety factors.

The invention provides a manufacturing method of a solar sail capable of being unfolded controllably and orderly based on shape memory polymers, and relates to the manufacturing method of the solar sail, in particular to the manufacturing method of the solar sail for a spacecraft. The invention aims to solve the problems that a driving mechanism is complex, an unfolding process is instable, a structure is easy to damage and air leakage occurs existing in the conventional solar sail with an inflatable type structure, and solve the problems that the structure is complex, the unfolding reliability is poor, the total weight is large, the folding efficiency is low and the emitting volume is large existing in the solar sail with a mechanical unfolded and supported structure. The manufacturing method disclosed by the invention comprises the following steps of firstly synthesizing shape memory polymeric materials into shape memory thin polymer films, and covering electrothermal films on the shape memory thin polymer films; and fixing flexible material light reflecting films on the shape memory thin polymer films covered with the electrothermal films, then energizing for heating the electrothermal films until the shape memory thin polymer films are softened, orderly folding the sail surface of the solar sail, and after power cut, cooling the electrothermal films so as to obtain the solar sail which is folded. The manufacturing method disclosed by the invention is suitable for manufacturing the solar sail.