MODELING AND ANALYSIS FOR SPACECRAFT DATABASE OF ELECTROMAGNETIC COMPATIBILITY

摘要

This paper focuses on system level EMC database modeling of spacecraft. Since there are many electromagnetic interference sources for the sensitive electron devices on the spacecraft, kinds of different EMI sources will be discussed at the beginning. The EMI radiated sources such as strong electromagnetic pulse, various payloads radiated emissions and high-power AC/DC conducted emissions etc will be analyzed in details. After that, as for sensitive devices easily to be interfered by others.types of EMI sources, the EMI estimation formulae will be deduced. Following that, according to deduced EMI estimation formula, the EMI prediction models for sensitive devices will be given out. Because of several of sensitive devices on the spacecraft, different database estimation model should be made according to the allowed EMI safeguard levels. Based on which has been discussed spacecraft database of EMC, the subsystem (equipment) level devices EMC prediction can be simulation under this model. This design methodology can be used in spaceflight project of the various payloads to ensure compliance with the stringent EMI requirements.