Gimballed vibrating wheel gyroscope having strain relief...

Details Gimballed vibrating wheel gyroscope having strain relief... Gimballed vibrating wheel gyroscope having strain relief...

G - Physics

01

C

G01C 19/56 (2006.01) G01P 15/08 (2006.01) G01P 15/125 (2006.01)

Patent

CA 2220773

A gimballed vibrating wheel gyroscope (10) for detecting rotational rates in inertial space. The gyroscope (10) includes a support (20) oriented in a first plane and a wheel assembly (12) disposed over the support (20) parallel to the first plane. The wheel assembly (12) is adapted for vibrating rotationally at a predetermined frequency in the first plane and is responsive to rotational rates about a coplanar input axis (32) for providing an output torque about a coplanar output axis (34). The gyroscope (10) also includes a post assembly (18a, 18b) extending between the support (20) and the wheel assembly (12) for supporting the wheel assembly (12). The wheel assembly (12) has an inner hub (24), an outer wheel (26), and spoke flexures (28a-28d) extending between the inner hub (24) and the outer wheel (26) and being stiff along both the input and output axes (32, 34). A flexure (22a, 22b) is incorporated in the post assembly (18a, 18b) between the support (20) and the wheel assembly inner hub (24) and is relatively flexible along the output axis (34) and relatively stiff along the input axis (32).

Gyroscope (10) à roue vibratoire monté sur cardan destiné à détecter des vitesses de rotation dans un espace inertiel. Ce gyroscope (10) comprend un support (20) orienté dans un premier plan et un ensemble roue (12) situé au-dessus du support (20) et parallèle au premier plan. L'ensemble roue (12) est adapté pour vibrer en rotation à une fréquence prédéterminée dans le premier plan et réagit à des vitesses de rotation autour d'un axe d'entrée coplanaire (32) afin de produire un couple de sortie autour d'un axe de sortie coplanaire (34). Ce gyroscope (10) comprend également un ensemble montants (18a, 18b) s'étendant entre le support (20) et l'ensemble roue (12) afin de supporter ledit ensemble (12). Ledit ensemble roue (12) possède un moyeu intérieur (24), une roue extérieure (26) et des rayons incurvés (28a, 28d) s'étendant entre le moyeu intérieur (24) et la roue extérieure (26) et présentant une rigidité le long des axes d'entrée et de sortie (32, 34). Une incurvation (22a, 22b) est incorporée dans l'ensemble montants (18a, 18b) entre le support (20) et le moyeu intérieur (24) de l'ensemble roue et présente une souplesse relative le long de l'axe de sortie (34), ainsi qu'une rigidité relative le long de l'axe d'entrée (32).

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