As the key measurement load of Taiji-1 satellite, inertial sensor detects the acceleration disturbance of test mass (TM) under nonconservative force in line with the basic principle of capacitive sensing, while keeping the TM in equilibrium position through electrostatic drive. In order to ensure the smooth progress of the mission, it is necessary to test and evaluate the performance of inertial sensor on the ground. In this paper, a torsion pendulum system is designed to eliminate the influence of the Earth’s gravity so as to meet the requirements of ground test. The experimental results show that the inertial sensor in closed-loop control mode can stably keep the TM at equilibrium position. At the same time, the ground detection of acceleration resolution of inertial sensor is greatly affected by ground vibration noise. If the inertial sensor operates normally in space, its acceleration resolution can reach3.96 × 10−9m/s2/Hz, thus meeting the requirement of Taiji-1.

中文翻译：

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基于扭摆系统的太极一号卫星高精度惯性基准实现及地面评价

惯性传感器作为太极一号卫星的关键测量负载，按照电容传感的基本原理，在非保守力作用下检测待测质量（TM）的加速度扰动，同时通过静电驱动使待测质量保持在平衡位置。为了保证任务的顺利进行，需要对惯性传感器的地面性能进行测试和评估。本文设计了一种扭摆系统，以消除地球重力的影响，以满足地面试验的要求。实验结果表明，惯性传感器在闭环控制模式下可以稳定地保持TM处于平衡位置。同时，惯性传感器的加速度分辨率地面检测受地面振动噪声影响较大。3.96 × 10-9米/s2/赫兹，从而满足太极一号的要求。