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Shufan Wu

 

Shufan Wu

Shanghai Jiao Tong University, China

Abstract Title:Key Technologies of Inertial Sensor for Space Gravitational Wave Detection

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Space inertial sensor is one of the key science payloads in space gravitational wave detection missions, aiming to detect infinitesimal change in gravitational waves. The detection principle, key technologies and research progress of the inertial sensor are introduced and discussed in this paper to illustrate its technical challenges. The key technologies of inertial sensor design are illustrated from three aspects: capacitance displacement sensing, electrostatic feedback control, and ground evaluation. Then, the development and research status of inertial sensors worldwide are reviewed and summarized. It can be seen that the residual acceleration noise is the key indicator of the inertial sensor. It reached 10-15 orders of magnitude abroad. There are three orders of magnitude deficit between domestic and abroad. Thus, the study on high-precision space inertial sensors has great strategic and scientific significance. To meet the needs of inertial sensors in China's future space gravitational wave detection missions, the research can focus on key technologies such as high-precision and low-noise sensing and control strategies of inertial sensors, test mass charge control, and ground verification.