| 静电悬浮加速度计的地面重力倾角标定方法 |
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| 引用本文： | 薛大同.静电悬浮加速度计的地面重力倾角标定方法[J].宇航学报,2011,32(3). |
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| 作者姓名： | 薛大同 |
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| 作者单位： | 中国空间技术研究院兰州物理研究所,兰州,730000 |
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| 摘 要： | 静电悬浮加速度计是重力场测量卫星上的主要载荷之一,其传感头(飞行件)需要在环境试验前后进行地面重力倾角标定.由于敏感轴之间的耦合机理不同于传统加速度计,所用的模型方程亦有所差别;由于失准角远大于量程范围内的重力倾角,无法采用传统的静态标定法确定模型方程各参数.必须采取技术措施使得三阶非线性系数可以忽略,才能在专用摆台上用动态标定法大致判断标度因数和检验成对加速度计模型方程各参数的一致性,用电模拟法得到二阶非线性系数.对动态标定法,提出了防止频谱泄漏和幅度谱中压低噪声干扰幅度的措施.对电模拟法,用实例给出了具体实施方案和效果.
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| 关 键 词： | 卫星重力测量 静电悬浮加速度计 地面标定 标度因数 二阶非线性系数 |
On-Ground Calibration Methods of Electrostatically Suspended Accelerometers with Gravity Inclination |
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| XUE Da-tong.On-Ground Calibration Methods of Electrostatically Suspended Accelerometers with Gravity Inclination[J].Journal of Astronautics,2011,32(3). |
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| Authors: | XUE Da-tong |
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| Institution: | XUE Da-tong (Lanzhou Institute of Physics,CAST,Lanzhou 730000,China) |
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| Abstract: | The electrostatically suspended accelerometers is one of the main payloads in the gravity field measurement satellite.The accelerometer sensor heads(flight model) must be calibrated on-ground with gravity inclination before and after environmental test.As different coupling mechanism between sensitive axes from the conventional accelerometers,the model equation used during calibrating the accelerometers is differential.As the misalignment angles are extremely bigger than the gravitational tilt angle on-grou... |
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| Keywords: | Satellite gravity measurement Electrostatically suspended accelerometer On-ground calibration Scale factor Second order non-linearity coefficient |
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