JPS6078899A - Multiple spin satellite - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-spin satellite having a plurality of platforms with different rotation speeds and rotation directions.

In recent years, as satellites have become larger, multi-spin satellites with multiple platforms with different rotations have come into use.

For example, a dual spin satellite includes a spin platform for stabilizing its attitude and a despan platform that includes an antenna pointing toward the Earth.

In such a satellite, the transmission of signals (e.g. telemetry, command signals) between the equipment mounted on the Despan R1s platform and the equipment mounted on the spin platform is done through slip rings and brushes because the rotation of each platform is different. It is being done. For this reason, there are electrical problems with contact characteristics, and mechanical problems such as brush wear and ring damage, which have a serious impact on the lifespan of the satellite.

An object of the present invention is to provide a highly reliable multi-spin satellite without mechanical contacts by converting electrical signals from one platform into optical signals and transmitting them to the other platform.

In order to achieve the above object, the multi-spin satellite according to the present invention rotates the plurality of platforms at different rotational speeds and directions by fitting the shaft of one platform with the hollow shaft of the other platform through a rotating member. In a multi-spin satellite configured to allow The optical input part of the 10th/E conversion circuit, the optical output part of the 2nd E10 conversion circuit, the optical output part of the 2E10 conversion circuit, and the optical input part of the 2E10 conversion circuit are related to the rotation between the platforms. They are arranged so that they always face each other, and are configured so that signals are transmitted and received between the shafts and hollow shafts between the devices mounted on each platform using optical signals.

According to the above configuration, it becomes possible to transmit and receive signals using optical signals (G), and the reliability of the satellite is improved by several steps, so that the object of the present invention can be completely achieved.

The present invention will be explained in more detail below with reference to the drawings.

FIG. 1 shows an embodiment of a multi-spin satellite according to the present invention, in which 1 is a despan section platform, 2 is a spin section platform, 3 is equipment mounted on the despan section, 4 is equipment mounted on the spin section, 5 is a second E10 conversion circuit, 6 is the 10th/E conversion circuit, 7 is the insulator, 8 is the bellow ring, 9u support, 10 is the device mounted on the despan section, the device mounted on the 1llj spin section, 12 is the IE10 conversion circuit, 13 is the 20th/E conversion circuit It is.

This figure shows a cross section of a two-way spin satellite in which a despan part platform 1 and a spin part platform 2 rotate in opposite directions via a bearing 8, which is a rotating member. The central axis of rotation is AA'. In the figure, the output of the spin unit mounting device 4 is @2 attached to the inner wall surface of the hollow shaft 2a.
E102E10 conversion is connected and the signal from the onboard equipment is the second
The E10 conversion circuit 5 converts the electrical signal into an optical signal. On the other hand, the device 3 mounted on the despan section is a support 9 built into the shaft 1a.
It is connected to the 107E conversion circuit 6 via. '4
The 107E conversion circuit 6 has a cylindrical shape and a light-receiving element is pasted on its surface, and the support 9 is arranged so that it can always receive the optical signal of the second E10 conversion circuit 5 with respect to the rotation of the A-A' shaft. is attached to the tip of the Therefore, the 2nd E10
The optical signal from the conversion circuit 5 or 1 is converted into an electrical signal by the 10th/E conversion circuit 6, and then supplied to the despan section mounted equipment 3. Note that the 1.0/E-conversion circuit 6 rotates integrally with the despan platform 1, but is electrically separated by an insulator 7.

Next, from the despan unit mounted equipment 10 to the spin unit mounted equipment 11
The case of transmitting a signal to is explained below.

The output of the equipment 10 mounted on the despan section is transmitted via the support 9 to the support 9.
It is connected to the IE10th conversion circuit 12 attached to the tip of the IE10. The 10th IE conversion circuit 12 converts the electric signal into an optical signal and sends it to the 20th/E conversion circuit 13 attached to the inner wall surface of the hollow shaft 2a of the spin section. 20th
/E conversion circuit 13 has a light-receiving element attached in a cylindrical shape, and the rotation of the despan section, that is, the 137° conversion circuit 1
It has a structure that can always receive an optical signal (T3) for 20 rotations.The electric signal converted by the @207E conversion circuit 13 is supplied to the spin unit 11.

As explained above, according to the present invention, the transmission and reception between the various platforms of the multi-spin satellite is carried out by optical signals without using mechanical contacts, resulting in highly reliable and long service life. satellites can be realized.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a sectional view of a double spin guard h↓. 1... Despan section platform 2... Spin section platform 3... Despan section mounted equipment 4... Spin section mounted equipment 5... Second E10 conversion circuit 6... First O/E Conversion circuit 7...Insulator 8...Bearing 9...Strut 10...Despan section mounted equipment 11...Spin section mounted equipment 12...@1 E10 conversion circuit 13...Second 0/E conversion circuit patent applicant Hiki Electric Co., Ltd. agent Patent attorney Inoro Hide Figure 1

Claims (1)

[Claims] In a multi-spin satellite configured to rotate multiple platforms at different rotational speeds and directions by fitting the shaft of one platform with the hollow shaft of the other platform via a rotating member, one The 10th/E conversion circuit and m1E10 conversion circuit are placed on the shaft tip of the platform, the 20th/E conversion circuit and the 2nd E10 conversion circuit are placed on the inner wall surface of the hollow shaft of the other platform, and the optical input of the $10/E conversion circuit is installed. The optical output section of the second E10 conversion circuit, the optical output section of the first E10 conversion circuit, and the optical input section of the '42B10 conversion circuit were installed in each platform so that they always faced each other regardless of rotation between the platforms. A multi-spin satellite characterized by transmitting and receiving signals between equipment shafts and hollow shafts using optical signals.