一种星载DSP软件的在轨编程方法

摘要

The Digital Signal Processor（DSP）,which is widely used in outer space system,needs on-board programming ability to acquire high reliability and flexibility against the space radicalization.The on-board software update and multi-system boot are realized by modifying the code of the Bootloader according to the boot principle of DSP,which makes long-distance problem solving and function expanding possible.Experiments show that this system can improve the reliability of system and decrease the probability of system crash due to some failure.%数字信号处理器在空间系统中已得到广泛应用,为了应对空间辐照等特殊环境,满足系统可扩展性、高可靠性的要求,要求系统具备在轨编程能力。根据数字信号处理器的引导启动原理,通过修改引导启动软件代码,可实现数字信号处理器的软件在轨升级和多系统启动,从而完成星载软件的远程故障修复和功能扩展。经实验室仿真验证,此方法可提高系统的可靠性,降低由于软件失效导致整个系统崩溃的可能性。