MEMS ACCELEROMETER CALIBRATION AT LOW FREQUENCIES

摘要

The accelerometer calibration at low frequencies and low acceleration values requires a specificinstrument not easy to find on the market.To solve this problem a system based on a pendulum has been realized in order to reach frequenciesless than 1 Hz and low acceleration values down to 0.01ms~2.The system does not require a reference accelerometer, as traditional calibration systems need. Thefundamental equation of a physical pendulum is used to obtain the reference acceleration values,which are function only of the angle 9 (between the gravity direction and the rod).