China Three Gorges University

Yunli Xu

Chao Wang

Sheng Zheng

Mingxue Shao

Min Liu

Guangduo Lu

Hua Zhao

Chao Zhang

Xianwei Yang

Hongguang Piao

Qiongying Ren

Liqing Pan

Zhihui Luo

Chao Tan

Xiufeng Huang

A high-precision magnetic suspension accelerometer for measuring the linear acceleration of a spacecraft is provided, comprising a magnetically shielded vacuum chamber system, a magnetic displacement sensing system, a magnetic suspension control system and a small magnetic proof mass. A optical coherence displacement detection technique is utilized for precisely measuring the position and the posture of the small magnetic proof mass in real time, and a magnetic suspension control technique is utilized for precisely controlling the position and the posture of the small magnetic proof mass to be brought back to the origin, so as to keep the small magnetic proof mass in the center of the systemic inner chamber. When the spacecraft is subject to a non-conservative force, the magnitude and direction of the acceleration can be precisely measured via the measurement of currents in the position control coils due to the acceleration of the spacecraft proportional to the currents of the position control coils. The accelerometer of the invention can avoid the technical bottleneck of high-precision machining, is easy to be produced and can achieve more high-precision measurement of the acceleration vector.

High-precision magnetic suspension accelerometer

Growing community of inventors

Yichang, China

Yunli Xu