A general approach to improve the bias stability of NMR gyroscope

TL;DR

This paper introduces a novel, general method inspired by rotation modulation to enhance the bias stability of NMR gyroscopes without needing to identify physical bias sources, validated through simulations.

Contribution

It presents a new approach that improves NMR gyroscope bias stability by leveraging the sign behavior of bias relative to sensing direction, independent of physical source considerations.

Findings

Method effectively modulates bias sign for stability

Simulation results confirm feasibility

Applicable without detailed physical bias modeling

Abstract

In recent years, progress in improving the bias stability of NMR gyroscopes has been hindered. Taking inspiration from the core idea of rotation modulation in the strapdown inertial navigation system, we propose a general approach to enhancing the bias stability of NMR gyroscopes that does not require consideration of the actual physical sources. The method operates on the fact that the sign of the bias does not follow that of the sensing direction of the NMR gyroscope, which is much easier to modulate than with other types of gyroscopes. We conducted simulations to validate the method's feasibility.