RU1818281C - Collapsible space antenna - Google Patents

Abstract

The invention relates to the field of space technology. The purpose of the invention is to increase the folding reliability during the mutual rotation of long flat panels deformed under the influence of solar heating. - is achieved in that in an antenna containing two long panels 1,2 connected by central and peripheral hinge assemblies, a folding drive, latches 7, levers 14, 15 of the peripheral hinge assembly are mounted on axes 16, 17 located on the flanges 12, 13, secured

Description

The invention relates to the field of space technology, in particular to systems for opening panel expandable space antennas.

The purpose of the invention is to increase the folding reliability during the mutual rotation of long flat panels deformed under the influence of solar heating, mainly when the drive and the antenna mount are located in the plane of its central section.

Figure 1 shows a folding space antenna in the working (unfolded) position; figure 2 - antenna in the folded position (arrows C indicate the direction of the heat flux); in Fig.3-bent under the influence of heat flux, the antenna in the initial stage of disclosure; figure 4 is a design diagram of a peripheral hinge assembly; in Fig.5 - node I in Fig.Z; Fig.6 is a diagram of the operation of the peripheral hinge assembly in the position of the antenna shown in Fig.5; Fig. 7 is a diagram of a hinge assembly in the open position of the panels at a folding angle of about 90 °; Fig.8 is a diagram of the hinge assembly in the working position of the panels; figure 9 is a section bB in figure 2; in FIG. 10 is a section AA from figure 1.

The folding space antenna consists of two panels 1, 2 connected by central 3 and peripheral 4 hinge assemblies. The central part of the lanel 1 is fixed to the space object using the adapter frame 5. The folding drive is installed on the central panel 1, In the working position, the panels 1 and 2 are connected by clamps 7. The hinge assemblies 3, 4 and clamps 7 are mounted on flanges 8 9.10.11 panels 1.2. To the flanges 10, 11 of the panels 1, 2, the flanges 12 are rigidly attached. 13 levers 14.15. Levers 14, 15

mounted on axles 16, 17 and can rotate on them, and the axles 16, 17 themselves are rigidly connected to the flanges 12, 13 of the levers 14, 15. The arms of the levers 14, 15 are connected by a common axis 18,

moreover, the lever arm 15 is connected to it through the bearing 19. The second arms 20, 21 of the levers 14, 15 are pressed against the thrust surfaces 22, 23 of the flanges 12,13 of the levers 14, 15 by the springs 24 through the balls 25. Springs 24

fasten in machines 26, rigidly attached to the flanges 12, 13 of the levers 14,15, and are regulated by nuts 27. Docking flanges 28, 29 are made on the levers 14, 15. The device operates as follows.

In the folded position, the antenna is in space for some time under the influence of the solar heat flux (Fig. 2). In the most unfavorable case

the solar flux is directed perpendicular to the plane of the panels. Due to the difference

temperature across the thickness of the panels

the antenna bends. In this position, she

begins to unfold (Fig. 3). In this case, the axis

18 together with the arms of the levers 15, 16 moves in the relative movement of the panels along an arc of small curvature along the plane of the panels 2 approximately normal to the axis of the hinge assembly 18, while the lever 15, turning on the axis 17 with the shoulder 21, presses the spring 24 in the cup 26, turning the lever 15 and moving the hinge axis 18, the distance between the axles 16.17 and the hinge axis 18 will not come in one line, and then

decreases, but not more than to the initial distance between the axles 16, 17.

Thus, the integrity of the protruding parts 30 of the antenna (emitters) located on

the plane of the panels. The rotation of the lever 15 occurs in all peripheral hinge nodes with different values of the angle of rotation and

different moves of the second shoulder 21, corresponding to the movement of the hinge axis 18.

In the opposite direction of the solar heat flux, the bending panels break in the other direction. In this case, the panel 2 is displaced with the lever 15, and the lever 14 is rotated.

At an opening angle of about 90 °, the spring 24 expands and returns the lever 14 to its original position. After the deployment is complete, the levers 14.15, in contact with the docking flanges 26 and 27, ensure the hinge assembly is stationary relative to the panels. The inability to reverse movement (folding) is provided by the latch 7, rigidly connecting the opposite edges of the panels 1,2 in the working position.

Claims (1)

Formula invented and Folding space antenna containing two flat panels interconnected by a central and peripheral articulated of assemblies, a drive for unfolding panels and clamps, which means that, in order to increase the reliability of the folding out during the mutual rotation of long flat panels deformed under the influence of solar heating, mainly when the drive and the antenna mount are located in the plane of its central section , in it, each peripheral hinge assembly is made in the form of two levers, each of which is axially fixed to the corresponding password with the possibility of limited rotation in the direction of the mount panel, p In this case, the first shoulder-pointed lever is connected by a pivot axis to the first shoulder of the adjacent lever, and the second shoulder interacting with the supporting surface is provided with a return spring, and the axis of the levers and the pivot axis are formed with an obtuse triangle when the panels are folded. I 4 2 FIG. i. to. 3 FIG. 4  gchg FIG. 6 H d FIG. 7 FIG. 8