Hemispherical Resonator Gyros (An Overview of Publications)

Маслов, А. А.; Maslov, D. A.; Ninalalov, I. G.; Merkuryev, I. V.

doi:10.1134/s2075108723010054

Cited by 7 publications

(2 citation statements)

References 52 publications

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“…The hemispherical resonator gyroscope (HRG) is the most accurate inertial sensor in the world [ 1 , 2 , 3 , 4 , 5 ]. In recent years, the demand for HRGs has significantly increased in aerospace and deep space exploration [ 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Multi-Population Approach for Sphericity Error Evaluation in the Manufacture of Hemispherical Shell Resonators

Zhao,

Cui,

Bian

et al. 2024

Sensors

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The performance of a hemispherical resonant gyroscope (HRG) is directly affected by the sphericity error of the thin-walled spherical shell of the hemispherical shell resonator (HSR). In the production process of the HSRs, high-speed, high-accuracy, and high-robustness requirements are necessary for evaluating sphericity errors. We designed a sphericity error evaluation method based on the minimum zone criterion with an adaptive number of subpopulations. The method utilizes the global optimal solution and the subpopulations’ optimal solution to guide the search, initializes the subpopulations through clustering, and dynamically eliminates inferior subpopulations. Simulation experiments demonstrate that the algorithm exhibits excellent evaluation accuracy when processing simulation datasets with different sphericity errors, radii, and numbers of sampling points. The uncertainty of the results reached the order of 10−9 mm. When processing up to 6000 simulation datasets, the algorithm’s solution deviation from the ideal sphericity error remained around −3 × 10−9 mm. And the sphericity error evaluation was completed within 1 s on average. Additionally, comparison experiments further confirmed the evaluation accuracy of the algorithm. In the HSR sample measurement experiments, our algorithm improved the sphericity error assessment accuracy of the HSR’s inner and outer contour sampling datasets by 17% and 4%, compared with the results given by the coordinate measuring machine. The experiment results demonstrated that the algorithm meets the requirements of sphericity error assessment in the manufacturing process of the HSRs and has the potential to be widely used in the future.

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Section: Introductionmentioning

confidence: 99%

An Adaptive Multi-Population Approach for Sphericity Error Evaluation in the Manufacture of Hemispherical Shell Resonators

Zhao,

Cui,

Bian

et al. 2024

Sensors

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“…The hemispherical resonator gyroscope (HRG) is a classic Coriolis vibration gyroscope [1][2][3][4], which utilizes the Coriolis effect on standing waves in an axisymmetric shell to measure angular velocity with respect to the inertial space. Its characteristics of high dynamics, high precision, high reliability, long service life, low power consumption and miniaturization have attracted wide attention in recent years [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Nonlinear High-Intensity Dynamic Processes on the Standing Wave Precession of a Non-Ideal Hemispherical Resonator

Cheng,

Ren,

et al. 2024

Sensors

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The properties of small size, low noise, high performance and no wear-out have made the hemispherical resonator gyroscope a good choice for high-value space missions. To enhance the precision of the hemispherical resonator gyroscope for use in tasks with large angular velocities and angular accelerations, this paper investigates the standing wave precession of a non-ideal hemispherical resonator under nonlinear high-intensity dynamic conditions. Based on the thin shell theory of elasticity, a dynamic model of a hemispherical resonator is established by using Lagrange’s second kind equation. Then, the dynamic model is equivalently transformed into a simple harmonic vibration model of a point mass in two-dimensional space, which is analyzed using a method of averaging that separates the slow variables from the fast variables. The results reveal that taking the nonlinear terms about the square of the angular velocity and the angular acceleration in the dynamic equation into account can weaken the influence of the 4th harmonic component of a mass defect on standing wave drift, and the extent of this weakening effect varies with the dimensions of the mass defects, which is very important for steering the development of the high-precision hemispherical resonator gyroscope.

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