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Sensors 2017, 17(5), 1017;

Analysis of the Damping Characteristics of Cylindrical Resonators Influenced by Piezoelectric Electrodes

College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
Authors to whom correspondence should be addressed.
Academic Editor: Debbie G. Senesky
Received: 21 March 2017 / Revised: 24 April 2017 / Accepted: 24 April 2017 / Published: 4 May 2017
(This article belongs to the Section Physical Sensors)
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The cylindrical resonator gyroscope (CRG) is a typical Coriolis vibratory gyroscope whose performance is mostly influenced by the damping characteristic of the cylindrical resonator. However, the tremendous damping influences caused by pasting piezoelectric electrodes on the gyroscope, which degrades the performance to a large extent, have rarely been studied. In this paper, the dynamical model is established to analyze various forms of energy consumption. In addition, a FE COMSOL model is also created to discuss the damping influences of several significant parameters of the adhesive layer and piezoelectric electrodes, respectively, and then explicit influence laws are obtained. Simulation results demonstrate that the adhesive layer has some impact on the damping characteristic, but it not significant. The Q factor decreases about 30.31% in total as a result of pasting piezoelectric electrodes. What is more, it is discovered that piezoelectric electrodes with short length, locations away from the outside edges, proper width and well-chosen thickness are able to reduce the damping influences to a large extent. Afterwards, experiments of testing the Q factor are set up to validate the simulation values. View Full-Text
Keywords: damping characteristic; FE model; piezoelectric electrodes; adhesive layer damping characteristic; FE model; piezoelectric electrodes; adhesive layer

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Sun, J.; Wu, Y.; Xi, X.; Zhang, Y.; Wu, X. Analysis of the Damping Characteristics of Cylindrical Resonators Influenced by Piezoelectric Electrodes. Sensors 2017, 17, 1017.

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