| 摘要 |
<p>Three perpendicular axes define a spin axis (z) of a rotor (10), a gimbal axis (x) of a gimbal (20) mounting the rotor, and an input axis (y) for angular rate to be measured. The rotor has opposed masses (17) which render it unsymmetrical, although statically and dynamically balanced. The gimbal is coupled to a support (30) by cantilever springs (40). A pair of piezoelectric crystals (50,50 min ) are mounted to one spring to sense angular movement between the gimbal and the support caused by torque applied about the gimbal axis by an oscillatory Coriolis force due to the input angular rate and the spinning unsymmetrical rotor. The gimbal coupling is tuned to twice rotor frequency to increase sensitivity to the Coriolis force. The device achieves reduction of certain gyroscopic instabilities, imbalances and errors, and is useful in navigation instruments.</p> |
