Abstract: Unlike customary vibrating mass gyros which operate by exciting a first fundamental mode of vibration of the vibrating mass and by detecting the effect of the Coriolis force on a second fundamental mode of vibration of the vibrating mass orthogonal to the first mode, this gyro operates by giving its suspended mass a circular motion alternately in the forward and reverse directions and by deducing the gyrometric effect from the difference between the apparent frequencies of the circular motion of the suspended mass in one direction and in the other. This allows a considerable reduction in the drafting of the heading measurement obtained with this type of gyro.

Abstract: The invention relates to a gyrometer based on a vibrating structure, produced by micromachining in a thin planar wafer, including two symmetrical moving assemblies coupled by a coupling structure connecting these two assemblies in order to allow transfer of mechanical vibration energy between them, each moving assembly comprising three moving elements, a first inertial moving element intended to vibrate in two orthogonal directions Ox and Oy in the plane of the wafer, a second moving element intended to vibrate along Oy and connected to the first moving element and to fixed anchoring zones, by first linking means which allow the vibration movement of the first moving element along Oy to be transmitted to the second moving element without permitting movement of the second element along the Ox direction and a third moving element intended to vibrate along Oy and connected to the second moving element and to fixed anchoring zones by second linking means which allow the vibration movement of the second moving ele

Abstract: The invention relates to a gyrometer based on a vibrating structure, produced by micromachining in a thin planar wafer. It comprises four moving assemblies placed at the vertices of a virtual rectangle, each moving assembly being coupled to two moving assemblies located at neighboring vertices via a coupling structure and comprising an inertial first moving element connected to the coupling structure and intended to vibrate in two orthogonal directions in the plane of the wafer, namely an excitation direction and a detection direction, and a second moving element intended to vibrate in the detection direction and connected, on one side, to the first moving element and, on the other side, to anchoring zones via linking means.

Abstract: Unlike customary vibrating mass gyros which operate by exciting a first fundamental mode of vibration of the vibrating mass and by detecting the effect of the Coriolis force on a second fundamental mode of vibration of the vibrating mass orthogonal to the first mode, this gyro operates by giving its suspended mass a circular motion alternately in the forward and reverse directions and by deducing the gyrometric effect from the difference between the apparent frequencies of the circular motion of the suspended mass in one direction and in the other. This allows a considerable reduction in the drafting of the heading measurement obtained with this type of gyro.