A new self-test and self-calibration concept for micro-machined gyroscopes

The new approach of a self-test and self-calibration concept for micro-machined gyroscopes involves the generation of a reference angular rate using an additional oscillator. This results in Coriolis forces and thus to real inertial test signals for the Coriolis vibrating gyroscope (CVG). The reference signal is used for the implementation of full self-test and re-calibration functionality and to compensate errors and drifts during operation and life time arising in both CVG mechanics as well as electronics. Beyond that, an in-mission calibration can be applied to ensure higher system accuracy and reliability. The paper describes in detail the modeling, realization and measurement results to demonstrate the feasibility and capability of the new calibration concept.