Small satellite program control data fault tolerance method

Abstract

The invention provides a satellite program control data fault tolerance method, which comprises the following steps that S1, cyclic code coding is performed on an information part of each piece of program control data to obtain an error correction code of the program control data, and the information part of the program control data and the corresponding error correction code form the program control data; S2, multiple pieces of coded program control data form an up-injection program control frame, the up-injection program control frame is up-injected to a satellite service center computer, the up-injection program control frame comprises a synchronization word, a frame length, information parts and error correction codes of N pieces of program control data and a CRC check value, and N is larger than or equal to 1; s3, after receiving the up-injection program control frame, the satellite service center computer judges whether the synchronization word, the frame length and the CRC check value are correct or not, and if all are correct, N pieces of program control data are stored; otherwise, the up-injection program control frame is discarded; and S4, the satellite service center computer performs error detection and correction on each piece of stored program control data. According to the method, the original hardware structure is not changed, a hardware EDAC chip or FPGA does not need to be added, and program control data error detection and correction are achieved.

Description

technical field [0001] The invention relates to a low-cost satellite program-controlled data error correction method, which is used for error detection and error correction of small satellite program-controlled data and overcomes the space single particle effect. Background technique [0002] With the explosive growth of commercial satellite launches, the traditional 3 to 5-year large satellite research and development cycle cannot meet the business needs of commercial aerospace. The aerospace-grade devices widely used in spacecraft are often embargoed, the supply cycle is long, and the price is several times higher than that of COTS devices with the same function, and the performance is 2 to 3 generations behind, so commercial off-the-shelf (COTS) products are used instead of aerospace-grade products become a major direction of commercial aerospace development. Commercial off-the-shelf products generally face the single event upset (SEU) problem caused by space radiation w...

AI Technical Summary

Problems solved by technology

The use of TMR technology can combat SEU, but it takes up three times the storage space of the data to be protected. When the amount of data is large, it is often unacceptable, and with long-term on-orbit work, there may be accumulation of single event reversals, which will cause the failure of the 2 out of 3 method

Images