Research on Measuring Device and Method of Mass Center of Test Mass of Inertial Sensor
Inertial sensor is the key loads of space gravitational wave detection.The test mass(TM)in the inertial sensor is the inertial and measurement benchmark.The mass center offset from the geometric center of the TM generates stray force noise.Space gravitational wave detection requires less than 3.75µm for the mass center offset of the TM.Due to the need to obtain the precise the mass center of the TM,and commercial devices of measuring the mass center cannot meet the measurement accuracy of the mass center of the TM.In this paper,a novel mass center measuring device of a five-wire pendulum is designed,and the position of the mass center of the TM is obtained by measuring the free vibration frequency of the five-wire pendulum.Experimental results show that the measurement accuracy of the mass center of test mass is better than±1 µm,which satisfies requirements of the measurement accuracy of the mass center of the TM for space gravitational wave detection.
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维普
