Impact analysis of convected motion on the carrier frequency of a carrier-driven gyroscope signal

Abstract

A carrier-driven gyroscope, which is a new type of MEMS angular velocity gyroscope, is driven by carrier spin in its operation when transverse angular velocity is inputted (i.e., yaw or pitch in the direction of the vertical spin axis). The sensitive element of the gyroscope (i.e., silicon plate) will then generate the Coriolis effect and output a voltage signal. The carrier frequency in the gyroscope output signal is not completely identical to the spin frequency of the rotating carrier. The uncertainty of the motion trail synthesized by the carrier yaw or pitch will exert different levels of influence on the carrier frequency of the gyroscope output signal. Analyzing the influence of this convected motion on the output signal of the gyroscope installed on a spinning carrier can determine the accuracy of a carrier-driven gyroscope in solving carrier attitude information through experimental and numerical simulations of multiple scenarios of convected motion. The different levels of influence exerted by the carrier frequency of the carrier-driven gyroscope are obtained after the analysis. Experimental results and numerical analysis indicate that the carrier frequency of the carrier-driven gyroscope is the carrier spin frequency, which is obtained through the superposition of the convected motion frequency caused by the transverse angular velocity.