JP2727843B2 - Space release structure retention and release system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding and releasing a space deployable structure, and more particularly to releasing and operating a space deployable structure which is mounted on an artificial satellite and deployed and operated in outer space. The present invention relates to a system for holding and releasing a space deployable structure to be provided to a ship.

[0002]

2. Description of the Related Art Conventionally, as a system for holding and releasing a space deployable structure of this type, there is a system for holding and releasing a deployable solar cell paddle shown in FIG.

In this method, a solar battery paddle 1 folded as shown in FIG. 5 is held on an artificial satellite 7 by a tensioned restraining cable 2, and when releasing the holding state, the restraining cable 2 is cut off. The cable cutter 3 that uses a pyrotechnic to detonate is detonated, and the restraining cable 2 is cut.

[0004]

In the above-mentioned conventional solar cell paddle holding and releasing method, if the solar cell paddle breaks down, the satellite cannot secure power and becomes completely inoperable. Equipped with a plurality (usually two) of cable cutters that use an industrial product provides redundancy against a pyrotechnic failure.

[0005] However, as shown in the above example,
Even when two cable cutters are provided, when the cable cutter cannot completely cut the restraining cable and the restraining cable is caught between the blades of the cable cutter, as shown in FIG. There is a drawback that it is unavoidable that the restraining cable which cannot be separated from the satellite cannot be entangled with the satellite, which may cause a serious failure of the satellite.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a space deployment structure holding and releasing system which eliminates the above-mentioned drawbacks and provides redundancy for reliably releasing a holding state of a restraining cable for restraining a space deployment structure. It is in.

[0007]

SUMMARY OF THE INVENTION A system of the present invention is a method for holding and releasing a space deployment structure which is deployed and operated in space to release the holding state of the space deployment structure to an operation state. A plurality of cables that use a pyrotechnic in outer space by tying a restraining cable that holds the deployable structure for space to each of a pair of two pulleys on which cables are arranged and tensioning the loop-shaped cable. A structure is provided in which the loop-like cable is broken by a cutter to ensure the release of the space deployable structure.

[0008]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a front view of one embodiment of the present invention. In FIG. 1, 1 is a folded solar cell paddle, 2
Is a restraining cable for holding the solar battery paddle 1 on the satellite 12, and 3 is two cable cutters using pyrotechnics.

FIG. 2 is a front view showing part A of FIG. 1 in detail.

In FIG. 2, reference numeral 4 denotes a pulley;
Is connected to the terminal of the restraining cable 2. Reference numeral 6 denotes a loop cable hung outside the pulley 4. Reference numeral 3 denotes two cable cutters that use a pyrotechnic to cut the loop-shaped cable 6.

When the solar battery paddle 1 is released, the two cable cutters 3 are detonated and the loop-shaped cable 6 is cut.

When the loop-shaped cable 6 is cut, FIG.
As shown in (2), the pulley 4 attached to the end of the restraint cable 2 is in a free state, the restraint cable 2 is released, and the solar battery paddle 1 is released.

If one of the two cable cutters 3 cannot cut the loop-shaped cable 6 and gets stuck on the blade of the pyrotechnic,
When the other cable cutter 3 cuts the loop-shaped cable 6, the loop-shaped cable 6 is disengaged from the pulley 4, and the restraining cable 2 is separated as shown in FIG.

In this way, it is possible to ensure complete redundancy even for the failure of the pyrotechnic of the cable cutter 3, to reliably break the restraining cable 2, and to reliably open the space deployable structure. it can.

[0016]

As described above, according to the present invention, a restraining cable for holding a space deployable structure is connected to a looped cable tightened by two pulleys, and the looped cable is made of a pyrotechnic. By having a mechanism to cut with the cable cutter, even if the cable gets stuck in the blade due to a pyrotechnic failure of the cable cutter,
There is an effect that it is possible to ensure the redundancy that enables the release of the desired restraint cable.

[Brief description of the drawings]

FIG. 1 is a front view of a space deployment structure holding and releasing system according to an embodiment of the present invention.

FIG. 2 is a front view showing part A of FIG. 1 in detail.

FIG. 3 is an explanatory diagram showing a normal operation state in the embodiment of FIG. 1;

FIG. 4 shows one of the cable cutters 3 in the embodiment of FIG.
FIG. 9 is an explanatory diagram showing a situation in which one is malfunctioning.

FIG. 5 is a front view of a conventional space release structure holding and releasing system.

FIG. 6 is an explanatory diagram showing a situation where one of the cable cutters 3 of FIG. 5 is malfunctioning.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solar panel 2 Restraint cable 3 Cable cutter 4 Pulley 5 Terminal fitting 6 Loop cable 7 Artificial satellite

Claims (1)

(57) [Claims] 1. A space deployment structure holding and releasing system for releasing a holding state of a space deployment structure deployed and operated in space to an operating state, a pair of two pulleys provided with a loop-shaped cable. Tying the restraining cable holding the space deployable structure to each of them, tensioning the loop-shaped cable, and breaking the loop-shaped cable with a plurality of cable cutters utilizing pyrotechnics in outer space. A space release structure holding and releasing method, wherein the space deployment structure is reliably released by the above method.