Abstract: An extensible boom is extended in an extension direction from a state of being rolled in a cylindrical form, the extension direction being one of short directions of the cylindrical form. Protruding portions and recessed portions are alternately formed at each of one end and another end in a long direction of the cylindrical form. The protruding portions at the one end are located opposite the recessed portions at the other end. The recessed portions at the one end are located opposite the protruding portions at the other end. When the extensible boom is extended along the extension direction, the protruding portions at the one end engage with the recessed portions at the other end, and the recessed portions at the one end engage with the protruding portions at the other end, such that a cylindrical shape is formed along the extension direction.

Abstract: A gauge carrier holds an optical fiber having a gauge portion provided in one axial part thereof. A center region has a predefined stiffness and holds the gauge portion. Length in the longitudinal direction of the gauge carrier is equal to or greater than length of the gauge portion. Two split regions each have a stiffness different from that of the center portion, total length of the split regions in the longitudinal direction of the gauge carrier is greater than the length of the center region in the longitudinal direction, one of the split regions is positioned in front of the center region and holds a part of the optical fiber that is in front of the gauge portion, and the other is positioned in back of the center region and holds a part of the optical fiber that is in the back of the gauge portion.

Abstract: An extensible mast according to the present disclosure includes a first fiber layer made of a fiber-reinforced plastic, a second fiber layer that is arranged in contact with the first fiber layer and made of a fiber-reinforced plastic having a thermal expansion coefficient in a longitudinal direction larger than a thermal expansion coefficient in the longitudinal direction of the fiber-reinforced plastic applied to the first fiber layer, and an electric heating wire arranged on the second fiber layer. The number of times of overlapping of the electric heating wire in different layers when the first fiber layer, the second fiber layer, and the electric heating wire are wound and retracted in a roll shape is minimized. Thus, the elastic restoring force of the extensible mast can be maintained while an increase in weight and volume is suppressed.

Abstract: A solar array wing includes an extension mast to be extended from a wound state, and a support member, around which the extension mast is wound, to support the extension mast after the extension mast is extended. The support member is made of a fiber reinforced composite material. A coefficient of linear expansion of the fiber reinforced composite material, a unit of which is for each degree Celsius, in a direction that is orthogonal to an extension direction of the extension mast, is higher than or equal to ?1×10?6 and lower than or equal to 1×10?6.

Abstract: A solar power generation paddle includes a blanket that is stored by being taken up into a roll with using extension masts, and that is extended. Solar battery cells are disposed on one surface of the blanket, and thermoelectric conversion elements are disposed on the other surface of the blanket. A plurality of heat dissipation members are disposed on surfaces of the thermoelectric conversion elements which are opposite to surfaces near the blanket, along an extending direction, to cover the thermoelectric conversion elements.

Abstract: Provided is a method of designing a composite material laminated structure, the method including: a machine learning step of performing machine learning on a plurality of pieces of data each of which includes a pair of a physical property value of the composite material laminated structure and a laminate configuration of the composite material laminated structure, to obtain a relational expression depicting a relationship between the physical property value and the laminate configuration, the composite material laminated structure including a plurality of layers that are laminated; and a laminate configuration information calculation step of calculating, based on the relational expression and an objective value of the physical property value, laminate configuration information which is information of the laminate configuration that enables the objective value to be obtained.

Abstract: The pipe structure according to the present invention includes: a fiber-reinforced plastic pipe 5; moisture-proof foils 11, 12 which individually cover an outer circumferential surface of the pipe 5 and an inner circumferential surface thereof; and an intermediate part 4 which is made of metal and fitted to an end of the pipe 5, wherein end portions of the moisture-proof foils 11, 12 are tightly sandwiched between the pipe 5 and the intermediate part 4. This configuration reliably prevents an FRP pipe from absorbing moisture, and thus, prevents the FRP pipe from shrinking due to moisture exhaustion in outer space, whereby it is possible to obtain the pipe structure having excellent dimensional stability.

Abstract: A solar power generation paddle includes a blanket that is stored by being taken up into a roll with using extension masts, and that is extended. Solar battery cells are disposed on one surface of the blanket, and thermoelectric conversion elements are disposed on the other surface of the blanket. A plurality of heat dissipation members are disposed on surfaces of the thermoelectric conversion elements which are opposite to surfaces near the blanket, along an extending direction, to cover the thermoelectric conversion elements.