Articles

Performance assessment of a novel triaxis microgyroscope

[+] Author Affiliations
Nan-Chyuan Tsai

National Cheng Kung University, Department of Mechanical Engineering, Tainan 70101, Taiwan

Chung-Yang Sue

National Cheng Kung University, Department of Mechanical Engineering, Tainan 70101, Taiwan

Chih-Che Lin

National Cheng Kung University, Department of Mechanical Engineering, Tainan 70101, Taiwan

J. Micro/Nanolith. MEMS MOEMS. 7(4), 043030 (December 10, 2008). doi:10.1117/1.3033209
History: Received August 15, 2007; Revised September 19, 2008; Accepted October 03, 2008; Published December 10, 2008
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A novel triaxis microgyroscope is proposed. Three orthogonal axis angular rates for pitch, yaw, and row can be detected simultaneously by the presented microgyroscope. The coupling effect of the triaxis angular rates due to Coriolis response and nonlinearity of the high-frequency modes can be efficiently reduced by the decoupled mechanical structure design. First, a 8×8 linearized state-space representation with a “holonomic” constraint is established and the relative stability of the dynamic system is investigated. Second, the mathematical description and discussion upon performance indices for a microgyroscope, such as sensitivity, bandwidth, and resolution, are addressed. In addition, the quality factor is verified to be a significant design parameter for microgyroscopes. The performance and stability of the gyroscope could be degraded by choosing inappropriate quality factors. Moreover, the trade-off among performance indices for the gyroscope is theoretically evaluated and discussed. Finally, in order to meet most performance specifications, a pole/zero mapping design method is proposed to satisfy either large bandwidth or high-resolution requirements.

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© 2008 Society of Photo-Optical Instrumentation Engineers

Citation

Nan-Chyuan Tsai ; Chung-Yang Sue and Chih-Che Lin
"Performance assessment of a novel triaxis microgyroscope", J. Micro/Nanolith. MEMS MOEMS. 7(4), 043030 (December 10, 2008). ; http://dx.doi.org/10.1117/1.3033209


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