星载DC/DC转换器辐射损伤预警方案设计

Design of Radiation Damage Prognostics for Astrionic DC/DC Converters

星载DC/DC转换器是卫星、航天电子设备中辐射易损单元之一。文中采用国际上新兴的电子故障预测与健全管理方法(ePHM),设计了基于PWM的星载DC/DC转换器辐射损伤预警方案,可以在辐射致PWM损伤使基准电压漂移达到预警值时发出警报,为启动备用件赢得超前时间,避免卫星出现灾难性故障。

The DC/DC converter is one of the most damageable units in electronic systems of satellites and spacecrafts. This paper designs a scheme of radiation damage prognostics for astrionic DC/DC converters by the electronic prognostics and health management （ePHM） methodology. The system can monitor the radiation induced degradation of reference voltage in PWM to predict failures and provide warning to avoid catastrophic failure.