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Sensors 2019, 19(3), 730; https://doi.org/10.3390/s19030730

Design of a 1-bit MEMS Gyroscope using the Model Predictive Control Approach

1
Intelligent Space Systems Laboratory, School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW 2006, Australia
2
Centre for Quantum Technologies, National University of Singapore, Singapore 117543, Singapore
3
School of Engineering, Sun Yat-sen University, Guangzhou 510275, China
*
Author to whom correspondence should be addressed.
Received: 11 December 2018 / Revised: 24 January 2019 / Accepted: 3 February 2019 / Published: 11 February 2019
(This article belongs to the Special Issue MEMS Technology Based Sensors for Human Centered Applications)
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Abstract

In this paper, a bi-level Delta-Sigma modulator-based MEMS gyroscope design is presented based on a Model Predictive Control (MPC) approach. The MPC is popular because of its capability of handling hard constraints. In this work, we propose to combine the 1-bit nature of the bi-level Delta-Sigma modulator output with the MPC to develop a 1-bit processing-based MPC (OBMPC). This paper will focus on the affine relationship between the 1-bit feedback and the in-loop MPC controller, as this can potentially remove the multipliers from the controller. In doing so, the computational requirement of the MPC control is significantly alleviated, which makes the 1-bit MEMS Gyroscope feasible for implementation. In addition, a stable constrained MPC is designed, so that the input will not overload the quantizer while maintaining a higher Signal-to-Noise Ratio (SNR). View Full-Text
Keywords: MEMS gyroscope; digital control; model predictive control; sigma delta modulation MEMS gyroscope; digital control; model predictive control; sigma delta modulation
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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 (CC BY 4.0).
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Wu, X.; Xie, Z.; Bai, X.; Kwan, T. Design of a 1-bit MEMS Gyroscope using the Model Predictive Control Approach. Sensors 2019, 19, 730.

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