Design, Manufacturing and Testing of a Cylindrical Vibrating Gyroscope

Document Type : Article

Authors

1 Faculty of Industrial Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran.

2 Faculty of Aerospace Engineering, Tarbiat Modares University, Tehran, Iran.

3 Faculty of Electronic Engineering, Shahed University, Tehran, Iran.

4 Faculty of Mechatronic Engineering, Iran University of Science and Technology, Tehran, Iran.

Abstract

A resonating gyroscope with a cylindrical resonator is designed using finite element method with the aim of achieving the maximum oscillation amplitude. The gyroscope is manufactured with a resonator made of maraging steel and piezoelectric forcers and pick-offs. In order to investigate the effects of material and manufacturing method defects in the resonator frequency split and phase shift of the resonator are measured at the desired excitation frequency and mode shape. By measuring natural frequencies of two main axes in the desired mode shape, the frequency split of the resonator is measured and the factors affecting the accuracy of measurement have also been investigated experimentally. Also, the vibration pattern of the resonator has been recorded using an acoustic wave mechanism and the phase shift of the resonator has been measured. Measurement of frequency split showed that the resonator experiences a frequency split of about 1 Hz. In addition, the use of the acoustic wave mechanism showed a good efficiency in recording the position and shape of the vibration pattern. Measurement of the phase shift with the help of the acoustic mechanism has shown the presence of a 4-degrees phase shift. Finally, in order to prove the gyroscopic phenomenon, the effect of the resonator rotation rate on the vibration wave persistence was investigated and it has shown a suitable linear approximation.

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