JPH03119808A - Expansive transformer antenna - Google Patents

Abstract

PURPOSE:To enable a sub reflecting mirror to be housed in a main reflecting mirror reflection housing area and to realize an expansive transformer antenna with high housing efficiency by attaching an expansive housing function with high efficiency on a main reflecting mirror, and an extensive function by an air bag on a boom which holds the sub reflecting mirror. CONSTITUTION:A holding cable is cut with an explosive tube, etc., with a command from the ground, and an angle theta is increased by spreading a part between a main slide hinge 3 and a synchronizing slide hinge 7 with the spring force of a spring 12, and the main reflecting mirror 13 of an antenna is expanded, and finally, the expansion of the main reflecting mirror 13 is completed by abutting the main slide hinge 3 with a stopper 11. After the expansion of the main reflecting mirror 13 is completed, gas is inserted to the air bag 17 with the command, from the ground, and the boom 15 is extended with the extensive force of the air bag 17, which pushes up the sub reflecting mirror 14 held with the boom 15 in a direction outside the antenna. The extension of the air bag is stopped at a time when the sub reflecting mirror 14 is moved to a prescribed position, and the expansion of the antenna is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lightweight deployable transformer antenna that has high storability and deployment reliability.

[Prior Art] In recent years, the performance and reliability of space shuttles, Ariane rockets, etc. have improved, and economic benefits have been created in space utilization. Particularly large deployable tree antennas are suitable for ships,
FIGS. 7 to 10 are diagrams showing conventional deployable truss antennas, which are indispensable for communication in mobile bodies such as vehicles and have been actively developed. Fig. 7 shows the unfolded state of the antenna, and (13) in Fig. 2 is the main reflector of the unfolded truss antenna.

([4) is the center hub (16
) is a sub-reflector fixed to

FIG. 8 is an enlarged view of section A in FIG. 7, showing the configuration of the main reflecting mirror. In the figure, (1) is a mandrel with a connector (2) attached to its tip, and adjacent mandrels are arranged with their axes opposite to each other. (3) is a main slide hinge that slides on the mandrel (1), and (4) is a rib whose one end is radially pin-coupled to the main slide hinge (3) and can be expanded perpendicular to the axis of the mandrel. , is pin-coupled to a connector (2) on an adjacent mandrel (1) arranged in an opposite direction to the mandrel (1). Hereinafter, the connector on the top side of the deployable truss antenna will be referred to as (2a), the connector on the bottom side as (2b), and the connector located on the periphery of the upper and lower surfaces of the deployable truss antenna as (2c). I decided to. (5
) is the connector (2a) between each other, (2b) between each other, (2
c) Deployment wires connecting each other, between (2a) and (2c) and between (2b) and (2c), which are set to generate tension when the deployable truss antenna is deployed. (6) is the connector (2a) on the top side and the connector (2a) on the bottom side (
2b), a diagonal member that connects (2c) with a pin connection;
(7) is a synchronous slide hinge that slides on the shaft between the connector (2) and the main slide hinge (3), (8) is connected to the synchronous slide hinge (7) with a pin at one end, and has a rib on the other end. (a) Above shows a pin-coupled synchronous beam. (9)
is a conductive metal net that serves as the mirror surface of the main reflector of the truss antenna (13), and (10) is a net fixture for fixing the nate (9) to the truss.

Figure 9 is an enlarged view of part C in Figure 8, where (11) is a stopper that determines the bottom dead center of the main slide hinge (3) when the antenna is deployed, (12) is a coil spring that provides the deployment driving force, and θ is It shows the angle between the stem (1) and the rib (4), which is set to be around 90 degrees when the antenna is deployed. FIG. 10 shows the storage state of the deployable truss antenna.

Next, the operation will be explained. When the antenna is in the retracted state, the angle formed between the rib (4) and the mandrel (1) is almost zero, and the spring (12) is compressed by the main slide hinge (3) and the synchronized slide hinge (7) and accumulates strain energy. This state is restrained and held by a holding cable (not shown). In response to a command from the ground, the holding cable is cut by a detonator or the like, and the spring force of the spring (12) pushes apart the space between the main slide hinge (3) and the synchronized slide hinge (7), thereby separating the rib (4) and the mandrel ( 1) increases, the main reflector (13) of the antenna expands, and finally the main slide hinge (3) moves to the stopper (11).
The expansion ends when it hits. Main reflector of antenna (13
) is deployed, the distance between the tension points at both ends of the deployment wire (5) increases, generating tension and eliminating play in the hinge portion, resulting in a highly rigid structure.

[Problem to be solved by the invention]

In a conventional deployable truss antenna, the main reflector stores and deploys around the fixed sub-reflector. However, if the sub-reflector is fixed, the sub-reflector becomes the main reflector as shown in Figure 10. It protrudes greatly from the storage area, significantly reducing storage efficiency.

This invention has been made to solve the problems described in (-), and provides a deployable truss antenna that is highly deployable and retractable.

[Means to solve the problem]

In the deployable truss antenna according to one embodiment of the present invention, a boom that extends by the expansion force of the air bag is used as the structure supporting the sub-reflector, and by storing and deploying the sub-reflector, the sub-reflector is The mirror can be stored in the storage area of the main reflector.

In a deployable truss antenna according to another embodiment of the invention,
By using a boom, which is extended by the extension force of an extension mechanism consisting of a wire and a boom driven by a motor, as the structure supporting the sub-reflector, the sub-reflector can be stored and deployed.
When storing the deployable truss antenna, the sub-reflector can be stored in the storage area of the main reflector.

[Effect]

In one embodiment of the present invention, when the main reflector of the deployable truss antenna is stored, the sub-reflector is also contracted in the direction outside the antenna plane, thereby making it possible to reduce the storage area.

At this time, by using a boom that extends by the expansion force of the air pack as the structure supporting the sub-reflector, the sub-reflector also extends to a predetermined position when the main reflector of the deployable truss antenna is deployed, and functions as an antenna. be able to.

In another embodiment of the present invention, when the main reflector of the deployable truss antenna is stored, the sub-reflector is also contracted in a direction outside the antenna plane, thereby making it possible to reduce the storage area. At this time, by using a boom that extends by the extension force of an extension function consisting of a wire and a pulley that is driven by a motor as the structure supporting the sub-reflector, the sub-reflector can also be extended when the main reflector of the deployable truss antenna is deployed. It can extend to a predetermined position and function as an antenna.

〔Example〕

1 to 5 are diagrams showing one embodiment of the present invention.

Figure 1 shows the deployed state of the antenna. In Figure 1, (13) is the main reflector of the deployable truss antenna, (14) is the sub-reflector,
(15) is the boo A that holds the sub-reflector (14), (1
6) is a center hub that supports the boom (+5) and the main reflector (13) at the center.

FIG. 2 is an enlarged view of section A in FIG. 1, showing the configuration of the main reflecting mirror. In the figure, (1) is a mandrel with a connector (2) attached to its tip, and adjacent mandrels are arranged with their axes opposite to each other. (3) is the main slide hinge that slides on the mandrel (1) 1-, and (4) has one end radially pin-coupled to the L slide hinge (3) and can be deployed perpendicular to the axis of the mandrel. The ribs are pin-coupled to the connectors (2) of adjacent mandrels (1), . Hereinafter, - the connector on the L side of the deployable truss antenna will be referred to as (2a), the connector on the bottom side as (2b), and the connector located on the periphery of the upper and lower surfaces of the deployable truss antenna as (2C). They will be named separately. (5) is between the connectors (2a), (2
b) between each other, (2c) between each other, (2a) and (2c)
With a deployment wire connecting between (2b) and (2c),
The antenna is designed to generate tension when the deployable truss antenna is deployed. (6) is a bond on the −L plane side (2a
) and the lower side joint 'r (2b), a diagonal member that connects (2c) with a pin joint, (7) is a synchronous slide that slides on the shaft between the joint F (2) and the main slide hinge (3) The hinge (8) indicates a synchronous beam having one end pin-connected to the synchronous slide hinge (7) and the other end pin-connected to the rib (4) 1-. (9) is a conductive metal net that becomes the mirror surface of the truss antenna 1 mirror (13), and (10) is a net fixture for fixing the net (9) to the truss.

Figure 3 is an enlarged view of part C in Figure 2, where (+1) is a stopper that determines the bottom dead center of the main slide hinge (3) when the antenna is deployed, (+2) is a coil spring that provides the deployment driving force, and θ is It shows the angle between the stem (1) and the rib (4), which is set to be around 90 degrees when the antenna is deployed.

Figure 4 shows the stowed state of the antenna, with the sub-reflector (14)
is stored in the storage area of the main reflector (13). Figure 5 shows the stored state of the boom (15) that holds the sub-reflector (14), and (17) in Figure 2 shows the extension of the boom (15). It is an airbag that gives you strength.

Next, the operation will be explained. First, in the main reflector (13), when the antenna is in the retracted state, the angle θ shown in FIG. is accumulated, and this state is restrained and held by a holding cable (not shown). In response to a command from the ground, the holding cable is cut by a detonator, etc., and the above spring (1
By pushing apart the space between the main slide hinge (3) and the synchronous slide hinge (7) with the spring force in step 2), the angle θ increases and the main reflector (I3) of the antenna unfolds, and finally the main slide hinge ( 3) hits the stopper (11) and the expansion of the main reflecting mirror (13) ends. After the main reflector (13) has been deployed.

Gas is inserted into the airbag (17) by a command from the ground, and the expansion force of the airbag (17) causes the boom (1
5) extends and pushes up the sub-reflector (14) held by the second boom (15) toward the outside of the antenna plane. When the sub-reflector (14) moves to a predetermined position, the airbag stops expanding and the antenna deployment ends.

Next, other embodiments of the invention will be shown. 1 to 4 and 6 are diagrams showing other embodiments of the present invention.

Figure 1 shows the deployed state of the antenna. In Figure 2, (13) is the main reflector of the deployable truss antenna, (14) is the sub-reflector,
(15) is a boom (16) that holds the sub-reflector (14).
) is a center hub that supports the boom (15) and the main reflector (13) at the center.

FIG. 2 is an enlarged view of section A in FIG. 1, showing the configuration of the main reflecting mirror. In the figure, (1) is a mandrel with a connector (2) attached to its tip, and adjacent mandrels are arranged with their axes opposite to each other. (3) is a main slide hinge that slides on the mandrel (1), and (4) is a rib whose one end is radially pin-coupled to the main slide hinge (3) and can be expanded perpendicular to the axis of the mandrel. , is pin-coupled to a connector (2) on an adjacent mandrel (1) arranged in an opposite direction to the mandrel (1). Hereinafter, the connector on the top side of the deployable truss antenna will be referred to as (2a), the connector on the bottom side as (2b), and the connector located on the periphery of the upper and lower surfaces of the deployable truss antenna as (2c). I decided to. (5
) is the connector (2a) between each other, (2b) between each other, (2
c) Deployment wires connecting each other, between (2a) and (2c) and between (2b) and (2c), which are set to generate tension when the deployable truss antenna is deployed. (6) is a diagonal member that connects the connector (2a) on the top side, the connector (2b) on the bottom side, and (2c) by pin connection, and (7) is the connector (2) and the main slide hinge (3). The synchronous slide hinge (8) slides on the shaft between the synchronous slide hinges (8) indicates a synchronous beam having one end pin-connected to the synchronous slide hinge (7) and the other end pin-connected to the rib (4). (
9) is a conductive metal net that becomes the mirror surface of the truss antenna main reflector (13), and (1G) is a net fixture for fixing the net (9) to the truss.

Figure 3 is an enlarged view of part C in Figure 2, where (11) is a stopper that determines the bottom dead center of the main slide hinge (3) when the antenna is deployed, (12) is a coil spring that provides the deployment driving force, and θ is It shows the angle between the stem (1) and the rib (4), which is set to be around 90 degrees when the antenna is deployed.

Figure 4 shows the stowed state of the antenna, with the sub-reflector (14)
is stored in the storage area of the main reflector (13). Figure 6 shows the stored state of the boom (15) that holds the sub-reflector (14), and (18) in Figure 2 shows the extension of the boom (15). The power motor (19) is the motor (18) and boom (15).
), and (20) is a boom that determines the degree of freedom of the boom extension wire (19).

Next, the operation will be explained. First, in the main reflector (13), when the antenna is in the retracted state, the angle θ shown in FIG. is accumulated, and this state is restrained and held by a holding cable (not shown). In response to a command from the ground, the holding cable is cut by a detonator, etc., and the above spring (1
The angle θ increases by expanding the gap between the main slide hinge (3) and the synchronized slide hinge (7) with the spring force in step 2), and the sunset mirror (13) unfolds, and finally The slide hinge (3) hits the stopper (11) and the expansion of the main reflecting mirror 03) is completed. Main reflection #a (13
) The motor (18) starts turning [r+7] by a command from behind the development path γ.

The boom extension wire (19) is wound up via the pulley (20), and the boom (15) is extended by the tension of the boom extension wire (19), and the sub-reflector held by the boom (■5) When the sub-reflector (14) moves to a predetermined position, the rotation of the motor (18) is stopped and the deployment of the antenna is completed.

〔Effect of the invention〕

As described above, in one embodiment of the present invention, in addition to the highly efficient expansion/storage function of the main reflector, the boom holding the sub-reflector is provided with an extension function using an air pack, so that the sub-reflector also mirrors the main reflector. It can be stored within the storage area. This has the effect of realizing a deployable transformer antenna with even higher storage efficiency.

In another embodiment of the present invention, in addition to the highly efficient expansion and storage function of the main reflector, the boom holding the sub-reflector is provided with an extension function using a motor and boom extension wire, so that the sub-reflector also mirrors the main reflector. It can be stored within the storage area. This has the effect of realizing a deployable truss antenna with even higher storage efficiency.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of a deployable truss antenna after deployment showing one embodiment and another embodiment of the present invention, and FIG.
FIG. 3 is an enlarged view of part 0 of FIG. 2, showing the structure of the main mirror 1 in one embodiment and other embodiments of the present invention. FIG. 4 is a conceptual diagram of the deployable truss antenna when it is stored, showing one embodiment and other embodiments of the present invention. FIG. A diagram showing a stored state of a boom holding a sub-reflector in an embodiment of the present invention,
FIG. 6 is a diagram showing a retracted state of a boom holding a sub-reflector in another embodiment of the invention. Fig. 7 is a diagram of the shape of the deployable truss antenna after deployment in the conventional example, Fig. 8 is an enlarged view of section A in Fig. 7 and is a diagram showing the configuration of the 1L reflector in the conventional example, and Fig. 9 is a diagram showing the configuration of the 1L reflector in the conventional example. This is an enlarged view of part 0 of FIG. 8, showing the member coupling portion of the seven reflectors in the conventional example, and FIG. 10 is a diagram showing the stored state of the deployable truss antenna in the conventional example. In the figure, (1) is the mandrel, (2) is the connector, (3) is the main slide hinge, (4) is the rib, (5) is the deployment wire, (6) is the diagonal member 1 (7) is the synchronous slide Hinge, (8
) is a synchronous beam (9) is a metal net, (10) is a net fixed F, , (u) is a stopper, (12) is a coil spring,
(+3) is the L reflector, (14) is the sub-reflector, (+5
) is boom, (1,8) is center huff', (+7
) is an air pack, (1, 8) is a motor, and (+9) is an extension wire (20) is a boolean. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A mandrel to which a connector having a pin joint portion is coupled at one end and a stopper at the other end, a main slide hinge that slides the mandrel, one end of which is radially pin-coupled to the main slide hinge; six ribs that can be expanded in directions perpendicular to the axial direction of the mandrel, a synchronous slide hinge that slides between one end of the mandrel and the main slide hinge, one end of which is radially pin-coupled to the synchronous slide hinge, and six synchronous beams whose other ends are pin-coupled to the six ribs, and a coil spring provided between the main slide hinge and the synchronous slide hinge, and the axles are arranged in opposite directions. The ribs are arranged in such a way that the ribs, excluding the rib that becomes the free end of the deployable truss structure, are connected by connectors on the mandrels that are oriented in opposite directions, and the connectors on the mandrels that are in opposite directions are connected by diagonal members. a main reflecting mirror made up of a plurality of skeletons made up of a plurality of skeletons, a deploying wire that connects the other end of the rib serving as a free end of the deployable truss structure and the connectors, and a conductive metallic net; A sub-reflector paired with the above-mentioned main reflector;
A deployable truss antenna comprising: a boom that holds the sub-reflector after deployment; and an airbag that extends the boom. (2) a mandrel to which a connector having a pin joint portion is coupled at one end and a stopper at the other end; a main slide hinge that slides the mandrel; one end is radially pin-coupled to the main slide hinge; six ribs that can be expanded in directions perpendicular to the axial direction of the mandrel, a synchronous slide hinge that slides between one end of the mandrel and the main slide hinge, one end of which is radially pin-coupled to the synchronous slide hinge, and six synchronous beams whose other ends are pin-coupled to the six ribs, and a coil spring provided between the main slide hinge and the synchronous slide hinge, and the axles are arranged in opposite directions. The ribs are arranged in such a way that the ribs, excluding the rib that becomes the free end of the deployable truss structure, are connected by connectors on the mandrels that are oriented in opposite directions, and the connectors on the mandrels that are in opposite directions are connected by diagonal members. a main reflecting mirror made up of a plurality of skeletons made up of a plurality of skeletons, a deploying wire that connects the other end of the rib serving as a free end of the deployable truss structure and the connectors, and a conductive metallic net; A sub-reflector paired with the above-mentioned main reflector;
A boom that holds the secondary reflector after deployment, a motor that extends the boom, a boom extension wire that converts the rotational force of the motor into boom extension force, and a pulley that determines the degree of freedom of the boom extension wire. A deployable truss antenna characterized by: