High-reliability in-orbit self-correction system and method for on-board computer on the basis of 1553B bus

Abstract

The invention relates to a high-reliability in-orbit self-correction system and method for an on-board computer on the basis of a 1553B bus. The method comprises the following steps of: S1: the EEPROM (Electrically Erasable Programmable Read - Only Memory) of each on-board computer adopts a triple piece redundancy structure, i.e. the EEPROM comprises three code backup areas, and the same on-board software target code independently stored in each code backup area is subjected to the two-out-of-three cycle check of each page by aiming at a first on-board computer; S2: after the cycle check is finished, the on-board computer carries out independent diagnosis according to a checking result; and S3: the on-board computer transmits an independent diagnosis result to a backup second on-board computer through the 1553B bus, and carries out processing according to a response reply. By use of the method, the self-recovery operation of a satellite is realized through the cycle check, automatic diagnosis and automatic repairing on a premise that resetting is not carried out and a satellite task is not affected by aiming at each type of single event upset generated by the EEPROM of the on-board computer, and the method does not depend on ground telemetry and telecommand and has the advantages of being high in fault-tolerant capability, flexible in design, high in adaptability, good in instantaneity, high in safety and high in reliability.

Description

technical field [0001] The invention relates to an on-orbit self-correction system and method for a space-borne computer, specifically a high-reliability on-orbit self-correction system and method for a space-borne computer based on a 1553B bus, which belongs to the satellite security fault-tolerant technology. Background technique [0002] Due to the complexity of the space application environment, electronic devices in space vehicles are often affected by single event effects, causing varying degrees of failure to satellite functions. Since EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) is a user-changeable read-only memory, and the stored data will not be lost after power failure, it is widely used in the aerospace field. The on-board computer is the core electronic equipment on the satellite. Once a single event flip occurs in the EEPROM, if the on-board software malfunctions or resets abnormally, it will...

AI Technical Summary

Problems solved by technology

[0003] The existing fault-tolerant technology mainly improves the radiation resistance performance through hardware radiation resistance reinforcement technology, but it cannot avoid the occurrence of single event flipping, cannot automatically detect the occurrence of faults through the function of the on-board software itself, and cannot automatically repair according to the state of the fault. Keep satellite operations unaffected

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