The research on adaptive measurement of angular acceleration for photoelectric servo turntable

Abstract

The paper proposes a new measurement method of angular acceleration for photoelectric servo turntable. Piezoelectric angular acceleration sensor is used to measure angular acceleration directly, Adaptive FIR filter based on LMS algorithm is established on DSP, by which angular acceleration signal can be filtered and corrected errors adaptively, then angular acceleration signals can be measured adaptively. This method avoids measurement errors and calculation noise by computing angular acceleration indirectly, thus improving measurement precision and making measurement results better than traditional methods. The gotten angular acceleration can be sent to servo control mechanism as feed forward control signals to improve control effects of servo turntable significantly.