Calibration of Coupling Errors for Scale Factor Nonlinearity Improvement in Navigation-Grade Honeycomb Disk Resonator Gyroscope

Wang, Peng; Li, Qingsong; Xu, Yi; Zhang, Yongmeng; Xi, Xiang; Wu, Yulie; Wu, Xuezhong; Xiao, Dingbang

doi:10.1109/tie.2022.3187598

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…Generally, mode-matched sensors have better performance than split-mode sensors, but they exhibit a narrower bandwidth and a higher power consumption, requiring more complex electronics to guarantee matching stability over temperature and time. Regarding the state-of-the-art, the best-performing prototypes of MEMS gyroscopes are mode-matched disk resonating gyroscopes with a BIS slightly less than 0.01 • /h, measured at room temperature [98], [99]. A dual mass modematched MEMS gyroscope with special encapsulation achieving a BIS < 0.03 • /h was reported in [100].…”

Section: A Silicon-based Mems Gyroscopesmentioning

confidence: 99%

Miniaturization of Interferometric Optical Gyroscopes: A Review

Dell’Olio,

Natale,

Wang

et al. 2023

IEEE Sensors J.

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Gyroscopes are inertial sensors whose field of application is rapidly expanding. The growing interest in autonomous systems, CubeSats as well as their constellations, and unmanned vehicles is stimulating a strong interest in miniaturized gyroscopes for integration in inertial units with a volume smaller than 100 cm 3 . Some of these applications require gyroscopes that are highly immune to disturbances, especially vibrations, mechanical shocks, and radiation. In these application contexts, the use of microelectromechanical gyroscopes is often avoided in favor of sensors without moving parts, such as optical gyroscopes based on the Sagnac effect. The technology of interferometric optical gyroscopes is currently considered to be potentially capable of enabling the development of highly innovative angular velocity sensors, which are simultaneously inertial grade and miniaturized. This paper critically examines the scientific and R&D activity aimed at miniaturization of interferometric optical gyroscopes, focusing on recent results, perspectives, and physical limitations. Interferometric optical gyroscopes with dimensions similar to those of microelectromechanical gyroscopes and better performance than the latter in terms of immunity to disturbances have not yet been demonstrated, but this paper shows how this goal could be realistically achieved in the medium term through the use of integrated microphotonics. This paper compares the technology being analyzed with the competitive technologies, highlighting their strengths and limitations.

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Section: A Silicon-based Mems Gyroscopesmentioning

confidence: 99%

Miniaturization of Interferometric Optical Gyroscopes: A Review

Dell’Olio,

Natale,

Wang

et al. 2023

IEEE Sensors J.

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“…SF nonlinearity serves as a critical indicator of gyroscope stability, correlating with the measurement range and requiring careful consideration [ 23 ]. It is caused by errors within the system, including stiffness coupling, system phase error, readout module phase shift, and velocity amplitude mismatch.…”

Section: Introductionmentioning

confidence: 99%

Interactive Errors Analysis and Scale Factor Nonlinearity Reduction Methods for Lissajous Frequency Modulated MEMS Gyroscope

Li,

Wang,

Yan

et al. 2023

Sensors

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Although the Lissajous frequency modulated (LFM) mode can improve the long-term and temperature stability of the scale factor (SF) for mode mismatch MEMS gyroscopes, its SF nonlinearity poses a significant limitation for full-scale accuracy maintenance. This paper examines the interaction effects among stiffness coupling, system phase delay, readout demodulation phase shift, and velocity amplitude mismatch within the control process. Based on the completion of frequency difference control and demodulation phase matching, we clarify that the remaining stiffness coupling and residual system phase error are the primary factors influencing SF nonlinearity. Furthermore, SF nonlinearity is reduced through error compensation. On one hand, this paper suppresses stiffness coupling through the observation of the instantaneous frequency difference and the application of the quadrature voltage. On the other hand, system phase error is compensated by observing the amplitude control force and tuning the reference in the Phase-Locked Loops (PLLs). Subsequent simulations of these methods demonstrated a remarkable 97% reduction in SF nonlinearity within the measurement range of ±500°/s. In addition, an observed rule dictates that maintaining a sufficiently large frequency split effectively constrains the SF nonlinearity.

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