Virtually rotated MEMS whole angle gyroscope using independently controlled CW/CCW oscillations

Abstract

This paper reports a method to apply virtual rotation to a whole angle gyroscope (WAG) using independently controlled CW and CCW mode oscillations. The method does not require any additional mechanisms for the virtual rotation, but only changes the target phase values of two phase locked loops (PLLs). The virtual rotation at about 0.163 Hz was successfully applied to the WAG, and the angle locking phenomenon could be resolved. The bias instability as small as 1.1°/hr was observed.