Three-computer data interaction and voting method suitable for Mars detection

Abstract

The invention discloses a three-computer data interaction and voting method suitable for Mars detection. The three-computer data interaction and voting method comprises the steps of: setting a hardware shared memory independently in a satellite-borne computer system, and enabling each computer to directly access a memory address through using an IO interface between a CPU chip and the shared memory to obtain interaction information provided by other computers and interaction information written into the computer; sequentially writing three addresses of the memory according to bytes when the interaction information of the computer is written each time, sequentially reading the interaction information from the three addresses of the memory according to the bytes when the interaction information of other computers is read each time, performing two-out-of-three voting after reading is finished, and determining the final interaction information; and after computer software reads the interaction information sent by other computer software, performing two-out-of-three voting with the information of the computer, updating control information of the computer according to the voting result,finally completing information interaction and unifying operation states of control software of the three computers.

Description

technical field [0001] The invention relates to a three-computer data interaction and voting method suitable for Mars exploration, which belongs to the on-board computer system management technology for Mars exploration, in particular to a three-computer data interaction method. Background technique [0002] my country will launch a Mars probe in 2020. During the Mars exploration process, it is required that the three computers of the on-board computer system need to exchange a large amount of control information frequently, reliably and quickly. The three computers have been guaranteed to run in the same state for a long time. In the event of a failure, the onboard computer system needs to switch computers independently and smoothly, and control software functions before and after switching to maintain continuous operation. [0003] Existing near-Earth satellite models generally carry out computer interaction and information interaction in the following two ways: 1. The auth...

AI Technical Summary

Problems solved by technology

The speed of these two types of information exchange and data exchange is limited by the hardware interface. The 1553B bus cannot exceed 2Mbps at most, and the serial port 422 cannot exceed 114.2Kbps at most. Moreover, the hardware chip involved in data exchange is weak in anti-single event effect, prone to error data, and reliable. not tall

Not suitable for the high reliability and fast data interaction requirements of Mars exploration

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