A low-orbit small satellite fault-tolerant system and method

Abstract

The invention discloses a low-orbit small satellite fault-tolerant system and method. The system includes a memory component interface, first, second and third processors in parallel, first, second and third logic judgment modules in parallel, and an external interface; the three processors can be set as master, slave or cold standby; the master and slave process the data and instructions accessed by the storage component interface, and the cold standby does not work; each logic judgment module There are communication connections with two of the first, second and third processors; the output results of the two processors can be compared respectively, and an output signal is selected according to the comparison result to output to the peripheral interface and the data storage unit, Or start another remaining processor; its method is based on this system, by making two of the processors work at the same time and comparing the output signals, and starting the third processor to compare the output when the comparison fails, and finally decide the output, solve The problem of insufficient detection capability of the host computer and low reliability of output results in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of processor fault tolerance, and in particular relates to a low-orbit small satellite fault-tolerant system and method. Background technique [0002] For micro-satellites operating in orbit, processors mostly use high-tech such as micro-nano and micro-electromechanical systems. Due to the high sensitivity of processors to cosmic rays and alpha particles, transient errors will occur; due to small defects, such as high-temperature, low-pressure Specific situations such as certain situations will lead to intermittent failures of the processor; the processor is the control core of the entire satellite system, so it is necessary to design a fault-tolerant processor, and a multi-core redundant design solution is usually used to solve this problem. [0003] Chinese invention patent CN201210103767 discloses an FPGA-based soft-core fault-tolerant spaceborne computer solution, which consists of dual-redundant soft-co...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a low-orbit small satellite fault-tolerant system and method, the purpose of which is to use multiple identical processors, so that two of them can work simultaneously and perform output comparison and When the comparison fails, start another processor for output comparison, and finally decide the output, thereby solving the problems of insufficient host fault detection capability and low reliability of output results in the prior art

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