Dynamic Performance of A Novel Tilting Angle Measurement System Using Three Acceleromenters

In this paper, the dynamic performance of a novel tilting angle measurement system based on three MEMS (Micro-electromechanical System) accelerometers is studied. The sensitive range of angle measurement is expanded to 360 degrees through a proper arrangement of the accelerometers. The dynamic performance of the measurement system is characterized on a standard vibrating table with a different excitation. Measurement error is reduced by using Kalman filtering algorithm and the data fusion technique. It was found that the tilt error rotating around a circle is 0.9 degrees under the sine excitation at a frequency of 20Hz and a peak acceleration of 0.2g, while tilt error rotating around a circle is 0.43 degrees under the random excitation condition that the excitation frequency range is from 20 to 100 Hz, the effective acceleration is 8.94982 m/s(2) and power spectrum density 1 (m/s boolean AND 2)/root Hz. The minimum resolution is found to be 0.03 degrees by the tilt sensor under the random excitation with a peak value is 0.8g and the vibration frequency is 25Hz. The minimum resolution of the measurement system has a tendency to become worse when the vibration intensity becomes higher.