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Journal of Nanomaterials
Volume 2008 (2008), Article ID 429168, 9 pages
http://dx.doi.org/10.1155/2008/429168
Research Article

Modeling and Formulation of a Novel Microoptoelectromechanical Gyroscope

Centre for Mechanics, Smart Structure and Micro-Systems, Cape Peninsula University of Technology, Cape Town 7535, South Africa

Received 20 February 2008; Accepted 12 May 2008

Academic Editor: Rakesh Joshi

Copyright © 2008 Bohua Sun et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper proposed a novel design of microgyroscope based on MEMS structures and optic interferometric microdisplacement measurement technique. The gyroscope consists of microvibrator and interferometric readout. Using Coriolis force, the vibrator transfers the system rotation into a forced vibration; the induced vibration can be sensed by the interferometric microdisplacement measurement system. The optic measurement system has two mirrors which will reflect two rays into a detector. The comprehensive studies on the formulation and analysis of the proposed gyroscope have been undertaken; two key sensor equations have been derived in the first time in the world: (1) relation between rotation and phase shift of light , (2) relation between rotation and interferometric intensity of light . The comparison of the proposed gyroscope and well-know Sagnac formulation has been investigated; it shown that the proposed model is much better than Sagnac ones. The new model has finally get rid of needing very long fiber in the case of Sagnac gyroscope. The innovative model gives a new hope to fabricate high accurate and cheaper gyroscope. To date, the proposed gyroscope is the most accurate gyroscope.