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Sensors 2009, 9(8), 5952-5967; doi:10.3390/s90805952
Article

Oscillation Control Algorithms for Resonant Sensors with Applications to Vibratory Gyroscopes

1,* , 2, 1 and 1
Received: 30 June 2009; in revised form: 22 July 2009 / Accepted: 27 July 2009 / Published: 27 July 2009
(This article belongs to the Special Issue Sensor Algorithms)
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Abstract: We present two oscillation control algorithms for resonant sensors such as vibratory gyroscopes. One control algorithm tracks the resonant frequency of the resonator and the other algorithm tunes it to the specified resonant frequency by altering the resonator dynamics. Both algorithms maintain the specified amplitude of oscillations. The stability of each of the control systems is analyzed using the averaging method, and quantitative guidelines are given for selecting the control gains needed to achieve stability. The effects of displacement measurement noise on the accuracy of tracking and estimation of the resonant frequency are also analyzed. The proposed control algorithms are applied to two important problems in a vibratory gyroscope. The first is the leading-following resonator problem in the drive axis of MEMS dual-mass vibratory gyroscope where there is no mechanical linkage between the two proof-masses and the second is the on-line modal frequency matching problem in a general vibratory gyroscope. Simulation results demonstrate that the proposed control algorithms are effective. They ensure the proof-masses to oscillate in an anti-phase manner with the same resonant frequency and oscillation amplitude in a dual-mass gyroscope, and two modal frequencies to match in a general vibratory gyroscope.
Keywords: oscillation control; resonant sensor; vibratory gyroscope; averaging method; automatic gain control; phase-locked loop oscillation control; resonant sensor; vibratory gyroscope; averaging method; automatic gain control; phase-locked loop
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.

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MDPI and ACS Style

Park, S.; Tan, C.-W.; Kim, H.; Hong, S.K. Oscillation Control Algorithms for Resonant Sensors with Applications to Vibratory Gyroscopes. Sensors 2009, 9, 5952-5967.

AMA Style

Park S, Tan C-W, Kim H, Hong SK. Oscillation Control Algorithms for Resonant Sensors with Applications to Vibratory Gyroscopes. Sensors. 2009; 9(8):5952-5967.

Chicago/Turabian Style

Park, Sungsu; Tan, Chin-Woo; Kim, Haedong; Hong, Sung Kyung. 2009. "Oscillation Control Algorithms for Resonant Sensors with Applications to Vibratory Gyroscopes." Sensors 9, no. 8: 5952-5967.


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