摘要
为了实现空间微推力器的高精度推力测量,提出了一种电容桥式差分读出的双单摆推力测量方案,其测量频带从10-3Hz^0.016 Hz,可实现分辨率为0.1μN,量程1 mN的微推力测量。与意大利帕多瓦大学设计的双单摆微推力差分测量系统相比,方案具有更强的共模抑制能力,操作简单易行。
In order to test and calibrate electric propeller thrust with a resolution of 0. 1 μN,a design using two pendulums was propased. By subtracting the signal of the reference pendulum from the signal of measuring pendulum,most common mode noise can be rejected. By adopting capacity-bridge as displacement sensor,force from 0. 1 μN to 1 mN and frequency from 10- 3Hz to 0. 016 Hz can be measured to an accuracy of 0. 1 μN.
出处
《真空与低温》
2014年第3期136-139,共4页
Vacuum and Cryogenics
关键词
微推进器
双单摆
共模抑制
micro-thruster
double pendulum
differential mode measurement
