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: To provide a temperature measurement system, which is capable of preventing distortion that occurs in a temperature measurement object from being transmitted to an optical fiber, and improving responsiveness of heat transfer from the temperature measurement object to the optical fiber. The temperature measurement system includes: a temperature measurement object; an optical fiber provided on the temperature measurement object; an intermediate material provided on the optical fiber; and a pressing jig which is provided on the temperature measurement object, and is configured to press the optical fiber against the temperature measurement object through intermediation of the intermediate material, wherein the optical fiber is expandable and contractible in a longitudinal direction of the optical fiber due to a change in a temperature of the optical fiber with respect to the temperature measurement object and the intermediate material.

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: A lunar orbiting satellite system executes orbit planning of assigning a function (positioning, communication, and flashing) to an artificial satellite (AS) depending on a relative position of the AS to the moon at a time when the moon and the AS are observed from an input point on the earth, and correcting the relative position, which changes in accordance with the moon revolution period. The system includes: a satellite orbit planner which assigns a function to each ASs forming an AS group flying around the moon depending on a relative position of each ASs to the moon at a time when the moon and ASs are observed from an input point on the earth, and set a target orbit according to the function; and a satellite controller which causes the each ASs to execute control based on the function to implement switching of the function.

Abstract: A honeycomb sandwich structure in which moisture absorption deformation can be sufficiently suppressed and a method for manufacturing the same are provided. The honeycomb sandwich structure includes: a honeycomb core having a recess in a mesh of a carbon fiber fabric; a pair of face plates; a resin layer which fills a part of the recesses; and a water-impermeable film which covers an exposed area including surfaces of the resin layer and the honeycomb core, wherein the recess includes an unfilled part, the unfilled part is a part of the recess that is closer to the opening of the recess, and the unfilled part is not filled with the resin layer.

Abstract: A lunar orbiting satellite system executes orbit planning of assigning a function (positioning, communication, and flashing) to an artificial satellite (AS) depending on a relative position of the AS to the moon at a time when the moon and the AS are observed from an input point on the earth, and correcting the relative position, which changes in accordance with the moon revolution period. The system includes: a satellite orbit planner which assigns a function to each ASs forming an AS group flying around the moon depending on a relative position of each ASs to the moon at a time when the moon and ASs are observed from an input point on the earth, and set a target orbit according to the function; and a satellite controller which causes the each ASs to execute control based on the function to implement switching of the function.

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.

Abstract: A honeycomb sandwich structure in which moisture absorption deformation can be sufficiently suppressed and a method for manufacturing the same are provided. The honeycomb sandwich structure includes: a honeycomb core having a recess in a mesh of a carbon fiber fabric; a pair of face plates; a resin layer which fills a part of the recesses; and a water-impermeable film which covers an exposed area including surfaces of the resin layer and the honeycomb core, wherein the recess includes an unfilled part, the unfilled part is a part of the recess that is closer to the opening of the recess, and the unfilled part is not filled with the resin layer.

Abstract: A honeycomb core includes carbon fiber having four or more different fiber directions, and when a ribbon direction is set as an X axis direction, a cell width direction is set as a Y axis direction, and a direction that is orthogonal to the ribbon direction and the cell width direction is set as a Z axis direction. A condition in which angles formed by the X axis direction and the respective fiber directions of the carbon fiber are set at ?45 degrees, 0 degrees, 45 degrees, and 90 degrees is set as a reference condition. The respective fiber directions are rotated from the reference condition by a fixed rotation angle so that none of the fiber directions are parallel to the X axis direction.

Abstract: A resin impregnation detection device configured to detect resin impregnation in a resin impregnation process for a coil insulation layer. The resin impregnation detection device can be inserted in a narrow portion, is capable of detecting impregnation with a liquid resin, and does not leave metal foreign materials other than an optical fiber in a product even after the resin impregnation. The resin impregnation detection device includes an optical fiber including an FBG sensor, and a coating resin, which coats the FBG sensor. The coating resin includes a resin to be softened by contact with a detection target resin. The FBG sensor is applied with a compressive strain caused by cure shrinkage of the coating resin or heat shrinkage thereof from a curing temperature to a normal temperature.

Abstract: An optical fiber temperature sensor includes: a substrate having a first substrate main body, and a second substrate main body, which has a coefficient of thermal expansion larger than that of the first substrate main body, and is bonded to the first substrate main body; and an optical fiber having a FBG sensor portion for measuring a temperature from a relationship between a Bragg wavelength and the temperature, and the optical fiber is configured to be embedded in the second substrate main body so that the FBG sensor portion is positioned in the second substrate main body.

Abstract: A honeycomb sandwich structure includes a main body portion having a first skin material, a second skin material, and a honeycomb core sandwiched between the first skin material and the second skin material, and a thermoelectric conversion module that generates power using a temperature difference between a high temperature side module front surface and a low temperature side module rear surface. The thermoelectric conversion module is embedded in a main body portion such that at least one of the module front surface and the module rear surface is in a state being exposed from the main body portion, and as a result, a temperature difference is generated between the module front surface and the module rear surface.

Abstract: A resin impregnation detection device configured to detect resin impregnation in a resin impregnation process for a coil insulation layer. The resin impregnation detection device can be inserted in a narrow portion, is capable of detecting impregnation with a liquid resin, and does not leave metal foreign materials other than an optical fiber in a product even after the resin impregnation. The resin impregnation detection device includes an optical fiber including an FBG sensor, and a coating resin, which coats the FBG sensor. The coating resin includes a resin to be softened by contact with a detection target resin. The FBG sensor is applied with a compressive strain caused by cure shrinkage of the coating resin or heat shrinkage thereof from a curing temperature to a normal temperature.

Abstract: An optical fiber temperature sensor includes: a substrate having a first substrate main body, and a second substrate main body, which has a coefficient of thermal expansion larger than that of the first substrate main body, and is bonded to the first substrate main body; and an optical fiber having a FBG sensor portion for measuring a temperature from a relationship between a Bragg wavelength and the temperature, and the optical fiber is configured to be embedded in the second substrate main body so that the FBG sensor portion is positioned in the second substrate main body.

Abstract: A honeycomb sandwich structure formed of face skin materials made of fiber reinforced plastics and a honeycomb core has a structure in which an optical fiber sensor structure is embedded in an adhesive layer formed between the face skin materials and the honeycomb core. With this, it is possible to provide a honeycomb sandwich structure and a method of manufacturing the honeycomb sandwich structure that enable precise thermal control to be implemented even when a thermal control device is bonded onto a surface of the honeycomb sandwich structure and enable evaluation of a temperature with high resolution and high accuracy.

Abstract: A honeycomb core includes carbon fiber having four or more different fiber directions, and when a ribbon direction is set as an X axis direction, a cell width direction is set as a Y axis direction, and a direction that is orthogonal to the ribbon direction and the cell width direction is set as a Z axis direction. A condition in which angles formed by the X axis direction and the respective fiber directions of the carbon fiber are set at ?45 degrees, 0 degrees, 45 degrees, and 90 degrees is set as a reference condition. The respective fiber directions are rotated from the reference condition by a fixed rotation angle so that none of the fiber directions are parallel to the X axis direction.

Abstract: A honeycomb sandwich structure includes a main body portion having a first skin material, a second skin material, and a honeycomb core sandwiched between the first skin material and the second skin material, and a thermoelectric conversion module that generates power using a temperature difference between a high temperature side module front surface and a low temperature side module rear surface. The thermoelectric conversion module is embedded in a main body portion such that at least one of the module front surface and the module rear surface is in a state being exposed from the main body portion, and as a result, a temperature difference is generated between the module front surface and the module rear surface.

Abstract: Provided is an advanced grid structure manufactured by a lamination step of laminating a first tape prepreg group, a second tape prepreg group, and a third tape prepreg group repeatedly in the stated order on a forming die, in which grooves (2, 3, 4) in a lattice shape are formed in three directions, so as to provide crossing regions (7, 8, 9) in which two tape prepreg groups overlap each other, and a heating forming step of forming a laminate by heating under pressure. In the lamination step, the first tape prepreg group, the second tape prepreg group, and the third tape prepreg group are respectively laminated as one layer in crossing regions (7, 8, 9) so that a tape width is maintained, and laminated in non-crossing regions (2a, 3a, 4a) in a state of being folded as two layers in a width direction thereof.