基于八对差分电容极板的静电悬浮加速度计的设计

DESIGN OF ELECTROSTATIC SUSPENSION ACCELEROMETER BASED ON EIGHT PAIRS OF DIFFERENTIAL CAPACITANCE ELECTRODES

针对GOCE重力梯度卫星中使用的静电悬浮加速度计,对其采用的八对电容极板冗余设计的位移传感与反馈控制组合策略进行了讨论,并分析了其相对于CHAMP和GRACE重力卫星中使用的同类型加速度计的可靠度改善程度。

The capacitance sensing and feedback control combination algorithm for redundant design based on eight-pair capacitance electrodes,which is employed to the electrostatic suspension accelerometers in the GOCE gravity gradient satellite,is discussed,and then the pre-proposal on failure recovery for some possible faults of an accelerometer in orbit is formulated.Finally,its improvement reliability compared to similar accelerometers but with six-pair electrodes for the CHAMP and the GRACE missions is presented.