航天器上的处理器

1 概述

空间环境对电子信号的最大威胁就是电离辐射，其能使本来是1的数字信号“翻转”变成0，反之亦然

因此航天处理器的主要性能指标就是抗辐射性、容错性，还有就是可靠、稳定

2 MIPS

2.1 Mongoose-V

Feature

        Radiation hardened
        10~15 MHz version of the MIPS R3000
        Developed by Synova, Inc.

Applications

• NASA's Earth Observer 1 (EO-1) satellite (launched in Nov. 2000) --- Main flight computer
• NASA's Microwave Anisotropy Probe (MAP), (launched in June 2001) --- Main flight computer similar to that on EO-1.
• NASA's three microsatellites of Space Technology 5 (ST5) (launched in Mar. 2006) --- Onboard flight computer (the Command & Data Handling system)
• NASA's New Horizons spacecraft --- Two computer system, the Command and Data Handling system and the Guidance and Control processor. Each of the two systems is duplicated for redundancy, giving a total of four computers.

Reference

• [1] Speer, D. and G. Jackson and D. Raphael, "Flight Computer Design for the Space Technology 5 (ST-5) Mission," Proceedings of the 2002 IEEE Aerospace Conference, Big Sky, MT, March 2002.
• [3] http://www.synova.com/proc/mg5.html
• [4] http://en.wikipedia.org/wiki/Mongoose-V
• [5] http://en.wikipedia.org/wiki/New_Horizons#Flight_computer