Publication

Mode coupling aspects in a vibrating gyroscope

Philippe Renaud
1997
Journal Articles

Abstract

In this paper a new method for gyroscopic sensitivity evaluation of a vibrating angular rate sensor is presented. This method is used to evaluate the angular rate sensitivity of a four-beam-bridge gyroscope realized at IMT Neuchatel [ii. The frequency splitting between the excitation and the detection mode due to mechanical mode coupling is investigated. A design variant with optimized dimensions is proposed in order to reduce frequency splitting and increase the angular rate sensitivity. (C) 1997 Elsevier Science S.A.

Official source

https://infoscience.epfl.ch/entities/publication/e9a5f9c4-5da7-49dd-af23-d0b39a944f09

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Philippe Renaud
1997
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/e9a5f9c4-5da7-49dd-af23-d0b39a944f09

About this result

Related concepts (13)

Vibrating structure gyroscope

A vibrating structure gyroscope, defined by the IEEE as a Coriolis vibratory gyroscope (CVG), is a gyroscope that uses a vibrating structure to determine the rate of rotation. A vibrating structure gyroscope functions much like the halteres of flies (insects in the order Diptera). The underlying physical principle is that a vibrating object tends to continue vibrating in the same plane even if its support rotates. The Coriolis effect causes the object to exert a force on its support, and by measuring this force the rate of rotation can be determined.

Gyroscope

A gyroscope (from Ancient Greek γῦρος gŷros, "round" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientation and angular velocity. It is a spinning wheel or disc in which the axis of rotation (spin axis) is free to assume any orientation by itself. When rotating, the orientation of this axis is unaffected by tilting or rotation of the mounting, according to the conservation of angular momentum.

Inertial navigation system

An inertial navigation system (INS) is a navigation device that uses motion sensors (accelerometers), rotation sensors (gyroscopes) and a computer to continuously calculate by dead reckoning the position, the orientation, and the velocity (direction and speed of movement) of a moving object without the need for external references. Often the inertial sensors are supplemented by a barometric altimeter and sometimes by magnetic sensors (magnetometers) and/or speed measuring devices.

Related publications (1)

Mode coupling aspects in a vibrating gyroscope

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