Low volume micro satellite with flexible winded panels expandable after launch
Micro satellite is disclosed with foldable solar panels that may be winded around the body of the micro satellite so that the growth in outer dimensions of the satellite is no more than 10-20 mm along each one of the length, width and height of the microsatellite so that the micro satellite may be launched in an auxiliary payload volume of a launcher. The foldable solar panels may be deployed to employ area that exceeds 9 times the product of the length by the width of the satellite and 6 times the product of the height by the length. The solar power produced by the solar panel and their light weight enable carrying of cargo that is at least 0.6 of the of the total mass of the satellites.
1. A deployable micro satellite designed to fit, in stowed position, to a restrictive envelope having length (Ls), width (Ws) and height (Hs) of an auxiliary payload volume, comprising:
a satellite body;
a deployment mechanism and
at least one deployable flexible solar panel adapted to be wrapped around a perimeter of outer faces of the micro satellite, said satellite body comprising front, rear and side faces extending between a first face and a face opposite to the first face when in stowed position, the panel being held by a spring sheet metal frame which is in a compressed condition while wound around the micro satellite body so as to move to a natural position which is the deployed position on initiation of a deployment process;
wherein Hs>Ls>Ws,
wherein the area of said at least one deployable flexible solar panels, when fully deployed, exceeds at least 9 times Ws×Ls, and 6 times Hs×Ls.
2. The deployable micro satellite according to claim 1 wherein each of said deployable flexible solar panels is made of a thin layer of a substrate and at least one photo voltaic element stretched over said spring sheet metal frame.
3. The deployable micro satellite according to claim 1 comprising at least one second spring which is compressed against the body in the stowed position, to deploy from the panel surface in order to enlarge the bending moment of inertia, and to keep the panel in the straight deployed position.
4. The deployable micro satellite according to claim 1 wherein said solar array is a thin-film photovoltaic cell (TFPV) made of at least one material from the list of materials including amorphous silicon (a-Si), thin film Silicon, cadmium Telluride (CdTe), copper indium gallium selenide (CIGS), single cell Gallium Arsenide (GaAs), and flexible triple junction Gallium Arsenide (GaAs).
5. The deployable micro satellite according to claim 1 wherein when said at least one deployable flexible solar array is in its stowed position it employs no more than 10 mm on each side of the faces of said micro satellite along the Ls and the Ws dimensions.
6. The deployable micro satellite according to claim 1 having total weight Ms; and wherein said micro satellite is capable of carrying cargo weight Cw which is at least 0.60×Ms.
7. The deployable micro satellite of claim 6 further comprising:
docking mechanism adapted to enable docking onto another satellite, said docking mechanism comprising:
a robotic arm;
a connecting cone provided at the end of said robotic arm; and
at least one locking element disposed around the conical face of said connecting cone.