Multi-axes gyroscope
First Claim
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1. A multi-axes vibration monolithic gyroscope comprising:
- a mounting post fixedly attached to a base and defining a first axis;
a planar mass having a first portion fixedly attached to the post for limited relative rotational movement about two orthogonal axes and a second portion fixedly attached to the first portion for relative vibrational movement and the first and second portions being positioned in a plane perpendicular to the post, the mass defining second and third axes mutually perpendicular to each other and to the first axis;
driving apparatus mounted adjacent to the second portion of the mass for causing the second portion of the mass to move in a vibrational motion along the second axis; and
sensing apparatus positioned adjacent to the first portion of the mass for sensing movement of the first portion of the mass about the third axis in response to forces produced by rotational motion and for sensing movement of the first portion of the mass about the first axis in response to forces produced by rotational motion.
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Abstract
A vibration gyroscope with a mass mounted for vibrational movement on a central post. Sensing capacitors are mounted adjacent the mass for sensing vibrational movement in two perpendicular axes. The mass includes a pair of elements mounted between the parallel arms of an H shaped frame and powered for equal and opposite vibrations so that no movement is imparted to the frame except that caused by forces induced by rotational movement.
215 Citations
10 Claims
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1. A multi-axes vibration monolithic gyroscope comprising:
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a mounting post fixedly attached to a base and defining a first axis; a planar mass having a first portion fixedly attached to the post for limited relative rotational movement about two orthogonal axes and a second portion fixedly attached to the first portion for relative vibrational movement and the first and second portions being positioned in a plane perpendicular to the post, the mass defining second and third axes mutually perpendicular to each other and to the first axis; driving apparatus mounted adjacent to the second portion of the mass for causing the second portion of the mass to move in a vibrational motion along the second axis; and sensing apparatus positioned adjacent to the first portion of the mass for sensing movement of the first portion of the mass about the third axis in response to forces produced by rotational motion and for sensing movement of the first portion of the mass about the first axis in response to forces produced by rotational motion. - View Dependent Claims (2, 3)
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4. A multi-axes vibration monolithic gyroscope comprising:
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a mounting post fixedly attached to a base and defining a first axis; a mass including a frame and a pair of mass elements affixed to the frame by resilient members for vibratory movement along a second axis relative to the frame, the mass being positioned in a plane perpendicular to the post, the mass defining second and third axes mutually perpendicular to each other and to the first axis; springs affixed at one end to the post and at another end to the frame of the mass for symmetrically attaching the frame of the mass to the post for rotational movement about the first and third axes; driving apparatus mounted adjacent to the mass elements for causing the mass elements to move in a vibrational motion along the second axis; and sensing apparatus positioned adjacent to the mass frame for sensing movement of the mass frame about the third axis in response to forces produced by rotational motion and for sensing movement of the mass frame about the first axis in response to forces produced by rotational motion. - View Dependent Claims (5, 6, 7, 8)
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9. A multi-axes vibration monolithic gyroscope comprising:
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a substrate having a generally planar surface; a central mounting post fixedly attached to the planar surface of the substrate, generally perpendicular to the planar surface of the substrate and defining a first axis; a mass including a frame having a central opening therethrough and positioned symmetrically about the post in a plane parallel to the planar surface of the substrate, the mass further including a pair of mass elements affixed to the frame by resilient members for vibrational movement relative to the frame along a second axis perpendicular to the first axis and in the parallel plane; generally helical springs affixed at one end to the post and at another end to the frame of the mass within the central opening, and mounting the mass for vibrational movement relative to the post; vibrational motion driving apparatus mounted adjacent to the pair of mass elements for causing the pair of mass elements to move in a vibrational motion, in opposite directions along the second axis; and sensing capacitors, positioned adjacent the mass and defining a third axis mutually perpendicular to the first and second axes, for sensing movement of the mass in the first axis and in the third axis due to forces produced by rotational motion. - View Dependent Claims (10)
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Specification