Satellite-borne computer autonomously computer switching system based on field programmable gata array (FPGA)

Abstract

The invention relates to a satellite-borne computer autonomously computer switching system based on an FPGA, which monitors the working state of the current working computer by adopting a hardware watch dog, a dog biting counting module and a continuous dog biting identification module; when dog biting for one time is monitored, the current working computer is reset; when the second-time dog biting is monitored continuously in a certain time period t, the current working computer is switched into a standby engine; when the time interval of two-time dog biting is more than t, only the current working computer is reset and the computer switching is not implemented; the system also monitors the accumulated faults of the current working computer by adopting a dog biting accumulating counting module; and when the accumulated fault times are more than the set value N, the computer switching is implemented. The system can effectively monitor the faults of the satellite-borne computer, and effectively reduce the time for the computer switching on the basis of eliminating faults.

Description

technical field [0001] The invention relates to an FPGA-based on-board computer autonomous switching system, which belongs to the technical field of satellite on-board electronics. Background technique [0002] The on-board computer is the core component of the electronic system on the satellite. It is usually responsible for the management and control tasks of the entire satellite, and its reliability directly affects the reliability of the entire satellite. The operation of a large number of satellites in orbit shows that due to the influence of the space environment, even if a series of anti-irradiation measures are taken, the on-board computer system will inevitably have logic anomalies or failures due to space environment factors. Safe and reliable, the onboard computer usually adopts the dual-machine backup method of the main machine and the standby machine. When the main machine fails, it will switch to the standby machine, and when the standby machine fails, it will ...

AI Technical Summary

Problems solved by technology

[0004] The existing on-board computer switching machine mainly monitors the cumulative occurrences of the dog bite signal through the watchdog. As long as the cumulative number of times reaches 2, the master and backup machines will be switched. However, in actual situations, often when the first dog bite signal appears , the on-board computer can work normally for a long time. At this time, the on-board computer can be regarded as being in a normal state all the time. If there is another dog bite signal, the processing method of the prior art will directly execute the on-board computer. Shutdown, but this is unnecessary. As a result, the occurrence of shutdown cannot be effectively reduced, and the shutdown will cause the loss of the working data of the currently working on-board computer, and it is necessary to re-upload relevant information on the ground to continue working. Therefore, it will Increase the workload of satellite in-orbit operation management

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