JPS59223875A - Data handling system for satellite - Google Patents

Abstract

PURPOSE:To improve the efficiency of a data handling system at being loaded on a satellite by storing all functions of a function exclusive decentralized computer and an interface module into a single case. CONSTITUTION:All functions of an exclusive interface module 2 corresponding to an external device IU1, a function exclusive computer module 3 of a data editing function, a command function, etc., a host control unit 4 which controls the modules 2 and 3, and an interface module which exchange data directly with each device IU1 are stored into a single case 7. When the data is exchanged between the modules 2 and 3, a control unit MCU4 and the module 3 and between modules 3 respectively, the bus line between desired modules is used with activation of a bus adaptor 6.

Description

[Detailed Description of the Invention] The present invention is installed on an artificial satellite, etc., and each device (referred to as IU)
The function of editing and processing observation data (analog/digital) from The present invention relates to data handling system equipment that realizes data management and control of satellites by using microconbeaters.

Block diagrams of the prior art are shown in FIGS. 1 and 2.

Figure 1 shows that the encoder (BNC) unit edits analog and digital signals from each device IUs1 to Sn, and the command decoder (CMD) generates real-time command signals.
) section, program the generation of the program command signal.
It is a system device in which independent functions are organically combined into one box (1 to 1), which is performed by a timer (PRT) section. The disadvantage of this system is that the number of analog/digital signal lines and the number of command signal lines differ depending on the device.
The problem is that the instrumentation wiring becomes complicated.

Figure 2 shows that dedicated interface devices LU÷1 to n are prepared for each device IU≠1 to n, and the collection of analog/digital signals from each device and the generation of commands to the devices are performed centrally. This is a system performed by an interface device LU dedicated to each device, which is controlled by a control device MU. The drawbacks of this system are as follows.

(1) Since a dedicated interface device is required for each onboard device, the weight of the satellite increases and the size of the satellite becomes excessively large, resulting in poor system efficiency when installed in the satellite.

(2) Various devices IU and dedicated interface equipment L'
The U-to-U instrumentation wiring still suffers from the drawbacks of the prior art of FIG. 1 described above.

(3) Dedicated interface device LU and central controller 5M
A serial interface is used between U and U, which has the advantage of requiring less instrumentation wiring, but on the other hand, an extra interface circuit is required to deal with data synchronization and pit errors caused by external noise.

(4) Although the MU has a built-in computer and performs centralized control, the interrupt processing and software become complicated due to the single computer processing system.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art as described above and to provide a data handling system with high system efficiency when incorporated into a satellite.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 shows an implementation example of the present invention, 1 is an external device IU,
2 is a dedicated interface module (IOM) that corresponds to external equipment, 3 is a conheat module dedicated to functions such as data compilation function and command b function, and 4 is a dedicated computer module that manages and integrates distributed computer modules dedicated to functions. My control unit consists of a converter module or heartwarming system. 5 is for each combination
3' HAS adapter (BA) for data bus/address bus pipe 34i between module (IOM), 6 is internal parallel bus, 7
The above units 2 to 6 are combined into one box to form one box.
A data handling system device (DH8) is integrated and housed in the base, and 8 indicates a signal instrumentation line connecting D) Is and IU1.

An outline of the operation is shown below.

Observation data from each instrument (IU) 1 is dedicated to data collection 1;
is collected into the internal memory of the CPU≠1 (FDS) through the signal instrumentation line 8 and the internal parallel bus 6 by activating the appropriate IOM 2 under the control of the CPU. CPr1l (FDS) sends a data transfer request to the dedicated IOM of each device according to a predetermined time sequence, and edits it into a predetermined formant according to the above operation.

Command generation to each device (IU) is controlled by the computer module CPU+2 (CDS) dedicated to the command function, which activates the corresponding IOM and sends it to the device via the internal parallel bus, engineering OM, and signal instrumentation line. be done. Activation of the data editing and command generation is managed by the management control unit MCU4.

Data calculation processing of a specific external device (IU) is performed by a combination module CPU 3 (ALU) dedicated to calculation processing, and data collection and calculation processing are performed via a specific IOM. When simply transmitting the results of calculation processing by telemetry, the results are transferred to CPU S1 (FDS) under the control of MCU4. -1, If it is necessary to issue a command to a specific device based on the result of calculation processing, the command is requested to CPU+2 (CDS) under the control of MCU4. Management of the distributed computer modules 3 and data exchange between the computer modules 3 are all performed by the MCU 4, which is a host model.

Bus adapter (8 people) 6 is computer module 3
When data is exchanged between MCU4, computer module 3, and computer module 3, activate the necessary module node (sline) and set the other module's (sline) to high impedance. Data exchange between computer modules is still managed and controlled by the MCU of the higher-level model, so the structure is such that data conflicts do not occur.

The data handling system according to the present invention has the following advantages.

(1) The number of analog/digital signal lines and command signal lines between external equipment and system equipment can be unified, simplifying instrumentation wiring and reducing weight.

(2) Since a dedicated interface with external equipment is built into the equipment on a module-by-module basis, weight reduction can be achieved.

(3) Since the data editing function, command function, and calculation processing function are distributed to dedicated computer modules, software and interrupt processing can be simplified.

(4) Since the external device dedicated interface module and the computer module are connected inside the system device by the computer's original parallel interface, the drawbacks of the serial interface are eliminated.

In summary, according to the present invention, a distributed computer dedicated to functions such as an observation data editing function, a command (real-time command/log command) generation function, and a calculation processing function, and an upper control unit that manages and controls them, each Because it is a new device that integrates all the functions of an interface module that directly exchanges data with external devices in a single box case, and has a wider variety of functions than before,
A data handling system with high cost performance can be realized.

Therefore, it is particularly useful for data handling systems mounted on scientific satellites, deep space probes, etc., which require small size and light weight.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of conventionally used data handling system equipment, FIG. 2 is a block diagram of a conventionally considered data handling system, and FIG. 3 is a block diagram of data handling system equipment of the present invention. In the diagram, C...command signal, D...music analog/digital signal, IU/music/external device, IOM
...Input/output module, BA...Bus adapter, CPU...Computer module, MCU...Management control unit, D
H8... Data handling system equipment. fl 1 1゜Representative Patent Attorney Usui Uchihara

Claims (1)

[Claims] Distributed processing computer means that performs each function of editing and calculating observation data and command generation, and upper control computer or control software means that manages and controls the distributed computers. A device-specific interface module means connected to the means for exchanging data with an external device, and a bus adapter means for connecting each of the means to a bus are housed in one case. handling system.