Shock resistance of differential type ring-like resonator vibratory gyroscope

Chikovani, V. V.; Tsiruk, H. V.

doi:10.18372/1990-5548.42.8816

Cited by 3 publications

(6 citation statements)

References 2 publications

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“…In order to model MEMS gyro, first of all sensing element dynamic equations with real errors resulting from manufacturing imperfections should be accepted. There are well-known dynamic equations (5) In the rate mode of CVG operation standing wave is immovable relative to resonator. They are rotate together with the same angle rate.…”

Section: Mems Gyro Dynamic Equationsmentioning

confidence: 99%

“…Upper schematic of figure 3 represents the model of the first equation of system (5) in designations of the Simulink blocks. The second equation of system (5) model has not shown in the figure 3 because it is similar to the first one.…”

Section: Mems Gyro Dynamic Equationsmentioning

confidence: 99%

“…There is another option of choosing angle θ0 such that scale factors of the two channels are equal to each other. In this case external disturbances acting on the gyro can be effectively compensated for in difference channel [4,5]. There are also other advantages of differential mode of operation [6].…”

Section: Standing Wave Angle Controlmentioning

confidence: 99%

“…As well-known there are two mode of CVG operation -rate and rate integrating ones [2,10,11,19]. Investigations on differential mode of CVG operation have recently been appeared in the publications [4,5,6]. Differential mode of operation can effectively suppress external disturbances.…”

Section: Introductionmentioning

confidence: 99%

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Digital rate MEMS vibratory gyroscope modeling, tuning and simulation results

Chikovani

Tsiruk

2017

CyS

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This paper is dealing with modeling, tuning and simulation of standing wave control and information processing algorithm for rate MEMS ring-type vibratory gyroscope. Standing wave control algorithm is presented in the form allowing transition from rate to rate integrating and to differential modes of MEMS gyro operation by simple switching command. It enables to implement triple-mode MEMS gyro. Block diagrams of the standing wave control algorithm and resonance frequency tracking subsystem are presented. Drive and compensation signal phases tuning criteria are described and implemented. Detailed explanations to the main operations which are used in information processing algorithm are given. Also, simulation results in case of measurement of a constant and variable angle rates are presented.

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Section: Mems Gyro Dynamic Equationsmentioning

confidence: 99%

Section: Mems Gyro Dynamic Equationsmentioning

confidence: 99%

Section: Standing Wave Angle Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Digital rate MEMS vibratory gyroscope modeling, tuning and simulation results

Chikovani

Tsiruk

2017

CyS

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“…It is attracting increasingly attention in recent years because of merits of high precision, low cost and long life. An ideal balanced resonator is necessary for mode-matching of the ring vibratory gyroscope, and thus makes the gyroscope have a high sensitivity and small zero bias [4,5]. The frequency split, denoting the level of unbalanced mass and stiffness of the resonator, is a key parameter relating to the performance of the gyroscope [6,7].…”

Section: Introductionmentioning

confidence: 99%

Frequency Split Analysis of a Ring Vibratory Gyroscope Based on Harmonic Transformation of Parametric Errors

Zhang

Sun

et al. 2020

Preprint

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Ring vibratory gyroscopes are important angular rate sensors widely used in inertial navigation systems. A highly symmetrical resonator is the core part of the ring vibratory gyroscope. Frequency split is a key parameter which denotes the level of unbalanced mass and stiffness of the resonator. Many research works focus on the precise machining of the resonator for the sake of eliminating frequency split. However, for metallic ring resonators, the decrease of frequency split is not always proportional to the promotion of geometric accuracy. This paper investigates the frequency split of the ring resonator gyroscope caused by parametric errors including geometric and material imperfection via a method of harmonic transformation. The roundness error of the ring resonator is extracted, and then decomposed to a series of orders of harmonic waves. Transformation results show that for the tested resonator, its first 20 orders of harmonic waves contain the main components of the roundness error. Then a precise FEM modeling is built for frequency split analysis. The simulation result shows that the roundness error of the resonator can cause a frequency split of 0.6 Hz, which accounts for 16.2 % of the total frequency split. Based on the metallographic observation and grouping experiment of different metallic resonators, it is deduced that the main frequency split is caused by material heterogeneity. It shows that the material homogenization is as important as precise machining for the resonator of small frequency split. The proposed research provides an instruction to manufacture high quality metallic resonators.

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Micromachined Vibrating Ring Gyroscope Architecture with High-Linearity, Low Quadrature Error and Improved Mode Ordering

Gao

Jin

et al. 2020

Sensors

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A new micromachined vibrating ring gyroscope (VRG) architecture with low quadrature error and high-linearity is proposed, which successfully optimizes the working modes to first order resonance mode of the structure. The improved mode ordering can significantly reduce the vibration sensitivity of the device by adopting the hinge-frame mechanism. The frequency difference ratio is introduced to represent the optimization effect of modal characteristic. Furthermore, the influence of the structural parameters of hinge-frame mechanism on frequency difference ratio is clarified through analysis of related factors, which contributes to a more effective design of hinge-frame structure. The designed VRG architecture accomplishes the goal of high-linearity by using combination hinge and variable-area capacitance strategy, in contrast to the conventional approach via variable-separation drive/sense strategy. Finally, finite element method (FEM) simulations are carried out to investigate the stiffness, modal analysis, linearity, and decoupling characteristics of the design. The simulation results are sufficiently in agreement with theoretical calculations. Meanwhile, the hinge-frame mechanism can be widely applied in other existing ring gyroscopes, and the new design provides a path towards ultra-high performance for VRG.

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Shock resistance of differential type ring-like resonator vibratory gyroscope

Cited by 3 publications

References 2 publications

Digital rate MEMS vibratory gyroscope modeling, tuning and simulation results

Digital rate MEMS vibratory gyroscope modeling, tuning and simulation results

Frequency Split Analysis of a Ring Vibratory Gyroscope Based on Harmonic Transformation of Parametric Errors

Micromachined Vibrating Ring Gyroscope Architecture with High-Linearity, Low Quadrature Error and Improved Mode Ordering

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