| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a system for reducing bias in an accelerometer.SOLUTION: An accelerometer has a proof mass coupled to an accelerometer housing by a flexure suspension and a pair of negative electrostatic forcer electrodes separate from the proof mass on opposing sides. The system comprises a force rebalance servo and a negative electrostatic spring servo. The force rebalance servo provides a control signal to the proof mass in response to an electrical pickoff signal that indicates the motion of the proof mass relative to the accelerometer housing. The negative electrostatic spring servo applies a negative electrostatic spring DC voltage to the pair of negative electrostatic forcer electrodes to cancel net positive spring force of the combined flexure suspension and electrostatic spring associated with bias voltages acting on the proof mass in response to the nulling of a time varying signal in the output of the force rebalance servo.</p> |
