We propose a theoretical method of detection of angular velocity based on a two-mode mechanical resonator placed on a rotating platform. The Coriolis force induced by rotation provides the coupling between the two intrinsic mechanical modes, which oscillate along two orthogonal directions perpendicular to the rotating axis of the platform. According to the relationship between the frequencies of mechanical normal modes and the angular velocity, the angular velocity of the rotating platform can be deduced by detecting the frequencies of the mechanical normal modes. It is also shown that our method is applicable to detection of high angular velocities and can protect against thermal drift of mechanical frequencies in the case of degenerate intrinsic mechanical modes.

• Received 23 March 2018
• Revised 30 July 2018

DOI:https://doi.org/10.1103/PhysRevA.98.023862