A Satellite-Oriented Rotational On-board Computer Fault Tolerance System

Abstract

A switch type on-board computer tolerant system facing a satellite comprises a control module, a storage module and three single machines, the control module comprises a control unit and a voter, the control module obtains state information parameters from the outside world to set the state modes of the three single machines and sets a current tolerant system working mode after receiving task major parameters sent by the three single machines, and the voter conducts voting after reading the processing results of the three single machines from the storage module and outputs the most of the same results; the three single machines obtain on-board task data, extract task major parameters, send the task major parameters to the control unit, conduct processing on the on-board task data, and send the processing results to the storage module; the storage module receives the processing results of the three single machines and conducts storage. By means of the switch type on-board computer tolerant system facing the satellite, the task level and the backup idea are fused, the real-time performance and the reliability are achieved, the problems that transient faults and permanent faults may occur in the on-board computer can be well solved, and the service time of a system is prolonged.

Description

technical field [0001] The invention relates to the technical field of fault-tolerant satellite-borne computers, in particular to a satellite-oriented alternate fault-tolerant satellite-borne computer system. Background technique [0002] The onboard computer works for a long time in a complex space environment full of high-energy charged particles. When electronic devices are attacked by radiation, transient failures (recoverable failures) and permanent failures (non-recoverable failures) will occur due to single event effects and total dose effects. failure), so it is very important to design a scientific and efficient central computer fault-tolerant strategy. [0003] Traditional on-board computer fault-tolerant systems usually have the following types: two-machine cold backup fault-tolerant structure, two-machine hot backup fault-tolerant structure, three-machine hot backup fault-tolerant structure (including multi-machine hot backup fault-tolerant structure), for the ab...

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Problems solved by technology

[0003] Traditional on-board computer fault-tolerant systems usually have the following types: two-machine cold backup fault-tolerant structure, two-machine hot backup fault-tolerant structure, three-machine hot backup fault-tolerant structure (including multi-machine hot backup fault-tolerant structure), for the above three fault-tolerant schemes, The power of the hot backup system is large, while the real-time performance of the cold backup system is poor, and the overhead of three-machine hot backup is larger than that of two-machine

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