Study of Concurrent Piezo Actuation and Sensing on Drift Stability of CVGs

Abstract

Vibratory gyroscopes with piezoelectric transducers have found substantial number of applications where low drift rate is easily achievable with low cost, low weight and high reliability. However, piezoelectric transducers are prone to aging effects that cannot be compensated and hence affect gyro drift and scale factor stability. In this paper, two methods of using same piezoelectric transducer element for actuation and sensing are designed and evaluated for improving gyro performance.