On-board data management system self fault-tolerance method

Abstract

The invention relates to an on-board data management system self fault-tolerance method. A on-board data management system self fault-tolerance mechanism is divided into three levels: data fault tolerance, part level fault tolerance and system level fault tolerance, and the operations are sequentially carried out during the fault tolerance. The data fault tolerance comprises three aspects: data protocol verification, 1553B bus interface fault tolerance and RS422 bus fault tolerance. The part level fault tolerance comprises three aspects: random-access memory (RAM) chip fault tolerance, software watchdog fault tolerance and signal clock fault tolerance. The system level fault tolerance comprises two aspects: data management computer self switching fault tolerance and remote placing unit self switching fault tolerance. The method provided by the invention provides the fault tolerance at the data level, the part level and the system level, and the fault tolerance processing can be carried out on the data, the main function module and the single machine equipment. Through the layered fault tolerance processing, the respective fault tolerance on faults at different harm degrees can be realized. Through the layered fault tolerance processing, the cost caused by faults at a low harm degree can be reduced, and the reliability is also improved because corresponding fault tolerance measures are respectively adopted for various faults.

Description

technical field [0001] The invention relates to a spacecraft data management method. Background technique [0002] Such as figure 1 As shown, the data management system is generally composed of a digital tube computer, a remote control unit, a remote unit A, a remote unit B, a remote unit C, a remote unit D and a 1553B bus. The remote control unit is responsible for distributing the remote control instructions injected by the ground system; the remote unit A, remote unit B, remote unit C, and remote unit D are responsible for collecting the telemetry of other equipment and transmitting it to the digital control computer through the 1553B bus, and executing the digital control at the same time. Indirect instructions from the computer; the remote unit A also has the function of modulating the telemetry data organized by the digital tube computer and sending it down to the ground system through the transponder. [0003] The digital tube computer is the processing core of the ...

AI Technical Summary

Problems solved by technology

However, in actual use, some errors are not enough to cause fatal damage to the system, and frequent system reconstruction will seriously affect the normal operation of the data management system

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