A novel multiple-axis MEMS gyroscope-accelerometer with decoupling frames
ISSN: 0260-2288
Article publication date: 26 June 2019
Issue publication date: 23 August 2019
Abstract
Purpose
Technological capabilities of manufacturing microelectromechanical system (MEMS) gyroscopes are still insufficient if compared to manufacturing high-efficient gyroscopes and accelerometers. This creates weaknesses in their mechanical structure and restrictions in the measurement accuracy, stability and reliability of MEMS gyroscopes and accelerometers. This paper aims to develop a new architectural solutions for optimization of MEMS gyroscopes and accelerometers and propose a multi-axis MEMS inertial module combining the functions of gyroscope and accelerometer.
Design/methodology/approach
The finite element modeling (FEM) and the modal analysis in FEM are used for sensing, drive and control electrode capacitances of the multi-axis MEMS inertial module with the proposed new architecture. The description is given to its step-by-step process of manufacturing. Algorithms are developed to detect its angular rates and linear acceleration along three Cartesian axes.
Findings
Experimental results are obtained for eigenfrequencies and capacitances of sensing, drive and control electrodes for 50 manufactured prototypes of the silicon electromechanical sensor (SES). For 42 SES prototypes, a good match is observed between the calculated and simulated capacitance values of comb electrodes. Thus, the mean-square deviation is not over 20 per cent. The maximum difference between the calculated and simulated eigenfrequencies in the drive channel of 11 SES prototypes is not over 3 per cent. The same difference is detected for eigenfrequencies in the first sensing channel of 17 SES prototypes.
Originality/value
This study shows a way to design and optimize the structure and theoretical background for the development of the MEMS inertial module combining the functions of gyroscope and accelerometer. The obtained results will improve and expand the manufacturing technology of MEMS gyroscopes and accelerometers.
Keywords
Acknowledgements
This work was performed in National Research Tomsk Polytechnic University. The authors like to acknowledge the financial support from the Ministry of Education and Science of the Russian Federation (Agreement N 14.578.21.0232, unique identifier RFMEFI57817X0232).
Citation
Baranov, P., Nesterenko, T., Barbin, E., Koleda, A., Tanaka, S., Tsukamoto, T., Kulinich, I., Zykov, D. and Shelupanov, A. (2019), "A novel multiple-axis MEMS gyroscope-accelerometer with decoupling frames", Sensor Review, Vol. 39 No. 5, pp. 670-681. https://doi.org/10.1108/SR-05-2018-0133
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited