JPH0358503A - Expanded truss antenna - Google Patents

Abstract

PURPOSE:To prevent a torsion in a ring shape due to loosening by winding an expanding wire interlinking other end of a rib being a free end of expanded truss structure and a coupler by a pulley in the containing state and giving a tension to the expanding wire with a spiral spring at both the containing state and the expanding state. CONSTITUTION:An expanding wire 5 interlinking between couplers 2a, between couplers 2b, between couplers 2c, between couplers 2a and 2c, between couplers 2b and 2c is wound on a pulley 13 and a tension is exerted to the expanding wire 5 with a spiral spring 14. Thus, an angle theta is nearly zero in the antenna containing state, the spring 12 is compressed with a main slide hinge 3 and a synchronous slide hinge 7 and the energy of strain is constrained and preserved with a support cable. If the support cable is broken by a command from a ground station, the antenna is expanded by the spring force. Thus, no slack is caused to the expanding wire and the occurrence torsion in a ring shape due to slack is prevented.

Description

[Detailed Description of the Invention] [Field of Commercial Use] This invention relates to a lightweight deployable truss antenna that has high storage performance and deployment reliability.

[Conventional technology]

In recent years, the performance and reliability of space shuttles, Ariane rockets, etc. have improved, and the economic benefits of space utilization have begun to emerge. In particular, large deployable truss antennas are indispensable for communication in mobile bodies such as ships and vehicles, and their development has been actively carried out.

6 to 8 are diagrams showing conventional deployable truss antennas. Figure 6 shows the unfolded state of the antenna, and 0) in the figure is a mandrel with a connector {21 purple attached to its tip, and adjacent mandrels are arranged with their axes opposite to each other. 〈31 is the main sliding hinge that slides on the stem (+1, {4}
is a rib that is radially pin-coupled to the slide hinge (3) at one end and can be expanded perpendicularly to the axis of the mandrel (1).
1) It is pin-coupled to the upper connector (2》).Hereafter, the connector (2a) on the upper side of the deployable truss antenna, the connector t (2b) on the lower side. It will be named to distinguish it from the connector e(2C) located at the periphery.

(5) is the connector (2a) between each other, (2b) between each other.
(2C) Deployment wires connecting each other, (2a) and (2C), and (2b) and (2C), which are set to generate tension when the deployable truss antenna is deployed.

{6} is the connector on the top side (2a) and the connector on the bottom side (2a)
b) A diagonal member that connects , (2C) with a pin connection,
(7) is a synchronous slide hinge that slides on the shaft between the connector (21) and the main slide hinge (3), and (8) is connected to the synchronous slide hinge (7) with a pin at one end and litho { 4} The pin-coupled synchronous beam is shown above. (9)
is a conductive metal net that becomes the mirror surface of the truss antenna, and Q (1 is a net fixing tool for fixing the net {9} to the truss).

Figure 71a is an enlarged view of section C in Figure 6. (51 is the connector (2a) between each other, (2b) between each other, (2c
) Mutual. p between (2a) and (2C) and (2b) and (2
C) It is a deployment wire that connects the antennas, and is stretched between each antenna when the deployment truss antenna is deployed.

The eighth figure shows the state in which the deployable truss antenna is in the middle of being deployed.

Next, the operation will be explained. When the antenna is in the retracted state, the angle formed between the rib 141 and the mandrel (1) is almost zero, and the spring αa is connected to the main slide hinge (3) and the synchronous slide hinge (3).
7) to reduce the strain energy, and this state is restrained and held by a holding cable (not shown). The holding cable was cut by Bakukanji on command from the ground. By fully pushing and expanding the space between the main slide hinge (31) and the synchronized slide hinge (7) using the pane of spring a3, the angle formed between the rib (4) and the mandrel (1) increases and the antenna expands, and finally the main Deployment ends when the slide hinge (3) hits the strike spring αυ. When the antenna is deployed, the deploying wire 52 generates tension as the distance between the tension points at the ends of the yarn increases, which kills the free play in the hinge part. Therefore, a highly rigid structure is required.

[Problem to be solved by the invention]

In conventional deployable truss antennas, multiple thin wires are cleverly bundled together as a member of the deployable wire that connects the other end of the rib, which is the free end of the deployable truss structure, and the above-mentioned connectors. Some wires are used for delivery. However, the wire often twists in its shape when stored, creating a ring-shaped part. In many cases, a reasonable deployment becomes impossible due to reasons such as the button being stuck on the wood, etc., or the ring remaining in a lump shape after deployment. lower.

This invention was made to solve the above-mentioned problems, and provides a deployable truss antenna with high deployable reliability.

[Means to solve the problem]

In the deployable truss antenna according to one embodiment of the present invention, the deployable wire that connects the other end of the rib, which is the free end of the deployable truss structure, and the above-mentioned connectors is wound around a boob when stored. By applying tension with a spiral spring and pulling it out from the boot during deployment, it is possible to prevent ring-shaped torsion from occurring, which can easily cause problems with deployment.

In the deployable truss antenna according to another embodiment of the present invention,
As a member of the deployment wire that connects the other end of the rib, which is the free end of the deployment truss structure, and the above connectors. By using a wire whose part or all is in the shape of a coil spring.
By generating tension on the deployment wire both when stowed and when deployed. It is possible to prevent ring-shaped peeling from occurring, which tends to cause failure in expansion.

[Operation] Regarding one embodiment of this invention. When storing the deploying wire that connects the other end of the rib, which is the free end of the deployable truss structure, and the above-mentioned connectors, wrap it around a pulley and set it aside.
When the deployment wire is pulled out during deployment, the spiral spring applies tension to the deployment wire, thereby preventing the deployment wire from loosening. This can prevent ring-shaped twisting that occurs due to slack in the wire for deployment. If a ring-shaped part is formed, it may damage other structural members, etc., or the ring may leak like a lump after deployment, resulting in an obstruction to sufficient deployment. This can easily happen, but it can be prevented.

In another embodiment of the present invention, the button is partially or entirely shaped like a coil spring as a member of the deploying wire that connects the other end of the rib, which is the free end of the deployable truss structure, and the connectors. By using a wire that is , it is possible to generate tension in the deployment wire and prevent the deployment wire from loosening.

Two cabinets b. Ring-shaped twisting that occurs due to slack in the deployment wire can be prevented. Once a ring-shaped part is formed, it may hang onto other components, or it may remain in a lump-like shape after being expanded. It is possible to prevent this from becoming a hindrance to adequate development.

[Embodiment] FIGS. 1 to 3 and 5 are diagrams showing an embodiment of the present invention.

Figure 1 shows the unfolded state of the antenna. In the figure (11 is a mandrel with a connector (21) 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 shaft +11. (The reference numeral 41 denotes a rib whose one end is pin-coupled to the main slide hinge (3) in a radial manner, and which can be expanded directly to the axis of the mandrel, and which is arranged in the opposite direction to the mandrel (1).
vl is pin-coupled to the connector (2) on the centrifugal rod fll.

Thereafter, the connector on the top side of the above-mentioned deployable truss antenna will be connected to (2a
)． The connector on the lower surface side is designated as (2b), and the connector located on the periphery of the upper and lower surfaces of the above-mentioned deployed Toranu antenna is designated as (2C).
). (5) is the connector (
2a) Mutual. (2b) between each other, (2C) between each other, between (2a) and (2C), and between (2b) and (2c) with deployment wires that are set to generate tension when the deployable truss antenna is deployed. It is something that (6) is the connector (2a) on the top side and the connector (zb) on the bottom side,
(2c) is a diagonal member that connects by pin connection, (7) is a synchronous slide hinge that slides on the shaft between the connector (21) and the main slide hinge (3). {8I has one end connected to the synchronous slide hinge (7) with a pin, and the other end connected to the rib (4).
1 shows a pin-coupled synchronous beam. (9) is a conductive metal net that becomes the mirror surface of the truss antenna;
aO is a net fixture for fixing the net (9) to the truss.

Figure 2 is an enlarged view of part A in Figure 1, where the main slide hinge (31) is the stopper that determines the bottom dead center when the antenna is deployed, +13 is the coil panel that provides the driving force for deployment, and θ is the axis +11 and the rib. This shows the angle formed by (4).It is set to be around 90 degrees when the antenna is deployed.

FIG. 3 is an enlarged view of section B in FIG. +51 #'
i connector (2a) between each other j (2b) between each other # (2'
) Mutual. Between (2a) and (2C) and (2b) and (2
c) It is a deploying wire that connects between
The wire for deployment is configured to generate tension at +51 K so that no slack occurs.

Next, the operation will be explained. In the stowed state of the antenna, the angle θ shown in Fig. 2 is almost zero, and the spring a is compressed by the main slide hinge (31) and the synchronous slide hinge (7), and the strain energy 'fI: D is accumulated. is restrained and held by a time-keeping cable (not shown).The holding cable is cut by a detonator, etc. in response to a command from the ground, and the main slide hinge {
3) and the synchronous slide hinge f71, the angle θ increases and the antenna expands.Finally, the main slide hinge (31) hits the stop flange αυ and the expansion ends. Figure 5 shows the expansion of the deployable truss antenna. Although state D is shown in the middle, there is no slack in the deployment wire, so the reliability of deployment is very high.

Next, other embodiments of the invention will be shown. 1, 2, 4 and 5 show other embodiments of the invention.

FIG. 1 shows the unfolded state of the antenna. In the figure, fi+ is a mandrel with a connector (2) housed at 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 (11), +41 is a rib whose one end is radially pin-coupled to the main slide hinge f31 and can be expanded perpendicular to the axis of the mandrel (11); ) is placed in the opposite direction.
Connector +21 on 4 centrifugal rods +11 K-pin connected.

From now on, the bonding metal (2a
). The connector on the bottom side is (2b), and the connector located at the periphery on the upper and lower surfaces of the above deployable truss antenna is (2b).
C). {51 is a deployment wire that connects between the connectors (2a), (2b), (2c), (2a) and (20), and (2b) and (2C), and is used to connect the above deployment truss. It is set so that tension is generated when the antenna is expanded.{6} is the connector (2a) on the top side and the connector (2b) on the bottom side.
(2C) is a diagonal member that connects the pins together, (7) is a synchronous slide hinge that slides on the shaft between the connector (2} and the main slide hinge (3), and (8) is the synchronous slide hinge ( Pin one end to 7) and attach the other end to lino (4).
Sync pinned on 1 indicates SY. (9) is a conductive metal net that becomes the mirror surface of the truss antenna, and αI is a net fixture that fixes the net (9} to the truss.

The second section is an enlarged view of the first section A, where αυ is a stop that determines the bottom dead center of the main slide hinge (3) when the antenna is deployed. α is a coil spring that provides the deployment driving force. θ indicates the angle formed between the shaft 0) and the rib {41. The antenna is set so that it will be around 90 degrees when deployed.

FIG. 4 is an enlarged view of section B in FIG. (5) is the connector (2a) between each other, (2b) between each other, (2c)
Between each other, (2a) and (2C) and (2b) and (2C
), some or all of which forms a coiled spring. This coil spring portion always generates tension in the deployment wire +51 both during storage and deployment, so that the deployment wire (5) does not become slack.

Next, the operation will be explained. In the stowed state of the antenna, the angle θ shown in Fig. 2 is almost zero, and the spring α2 is compressed by the main slide hinge {3) and the synchronous slide hinge (7) and accumulates strain energy. It is held captive 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 main slide hinge {
31 and the synchronized slide hinge (7), the angle θ increases and the antenna is deployed.Finally, the main slide hinge (3) hits the stop flange αυ and the deployment is completed. Figure 5 shows the deployable truss antenna in the middle of deployment. Since there is no slack in the deployment wire, reliability in deployment is extremely high.

〔Effect of the invention〕

As described above, in one embodiment of the present invention, the deploying wire connects the other end of the rib, which is the free end of the deployable truss structure, and the connectors. When it is stored, it is wound around the pulley, and a spiral spring generates tension on the deployment wire both when it is stored and when it is deployed. It can be stored compactly and prevents the ring from twisting due to loosening. If a ring-shaped part is formed, it may rub off against other structural members, or it may remain in a lump-like shape after deployment, making it difficult to fully deploy it. It is easy to become a disorder, but it has the effect of preventing this.

In another embodiment of the present invention, it is used as a member of a deploying wire that connects the other end of the rib, which is the free end of the deployable truss structure, and the connectors. By using a wire that is partly or completely a coil spring, tension is constantly generated. This has the effect of preventing ring-shaped torsion from occurring due to loosening, and preventing obstacles to expansion caused by the formation of ring-shaped parts.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of a deployable truss antenna after deployment showing one embodiment and other embodiments of the present invention, and FIG. 2 is a diagram showing A of FIG. 1.
In the ward that expanded the department. FIG. 3 is a diagram showing a connecting portion of members according to an embodiment and other embodiments of the present invention. Figures 3 and 4 are
This is an enlarged view of part B in the figure, and FIG. 3 shows the shape of the deploying wire in one embodiment of the present invention, and FIG. 4 shows the shape of the deploying wire in another embodiment of the present invention. figure.
FIG. 5 is a diagram showing a state in the middle of deployment of the deployable truss antenna in one embodiment and another embodiment of the present invention. Figure 6 is a diagram of the shape of the conventional deployable truss antenna after deployment, and
The figure shows the shape of the deploying wire in the conventional example, and FIG. 8 is a diagram showing the state of the deployable truss antenna in the process of being deployed in the conventional example. In the figure, 0》 is the mandrel, 《2) is the connector, {3) is the main slide hinge, (41 is the rib. (51 is the deployment wire.
{61 is a diagonal member. (7) is a synchronous slide hinge, (81
is a synchronous beam. (9) is a metal net. αa is a net fixture.
αυ is the stopper, α4 is the coil panel, Q3 is the pulley,
a4 is a spiral spring. In the figure. The same reference numerals indicate the same or equivalent 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 plurality of skeletons formed of a plurality of frames, a deployment wire that connects the other end of the rib serving as a free end of the deployment truss structure and the connectors, a pulley that winds up the deployment wire when stored, and a pulley that winds up the deployment wire when it is deployed. A deployable truss antenna comprising: a spiral spring that applies tension to the deployable wire pulled out from the pulley; and a conductive metal net. (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 plurality of skeletons formed by the above-mentioned deployable truss structure; a deployable wire whose part or all is a coil spring that connects the other end of the rib serving as the free end of the deployable truss structure and the connectors;
A deployable truss antenna characterized by comprising a conductive metal net.