Abstract: Inertial sensor assembly is a high accuracy measure assembly in the spacecraft attitude control system. It needs not only to detect and dispose lowpower level signal, but also to export the highpower signal to control temperature and to drive motor. Electromagnetic compatibility design is a key technique which determines the performance of the product. According to the development experience of products, the way of controlling inner and outer interferential sources in products is proposed by analyzing typical case.

Key words: inertial attitude sensor, EMC, intermodulation interferece