Extension of measurement bandwidth in an AMB-based gyroscopic sensor

Maruyama, Yutaka; Mizuno, Takeshi; Takasaki, Masaya; Ishino, Yuji; Kameno, Hironori

doi:10.1016/j.mechatronics.2009.08.002

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…The tilted angles measured by the sensors can be described as (5) Substituting Equation (5) into (4), the equivalent dynamic equation becomes (6) Equation (6) has divided the torques into four parts, the first two items on the left side of the formula are the centrifugal moment and gyroscopic moment produced by the non-coincidence of geometric axis and rotation axis, and the last two parts are the centrifugal moment and gyroscopic moment produced by the non-coincidence of principle axis of inertia and geometric axis. Equation (6) can be represent in complex formation as (7) where , , j is the imaginary unit.…”

Section: Analysis Of Dynamic Imbalance In a Mssgmentioning

confidence: 99%

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Analysis, Modeling and Compensation of Dynamic Imbalance Error for a Magnetically Suspended Sensitive Gyroscope

Xin¹,

Cai²,

Ren³

et al. 2016

Journal of Magnetics

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Magnetically suspended sensitive gyroscopes (MSSGs) provide an interesting alternative for achieving precious attitude angular measurement. To effectively reduce the measurement error caused by dynamic imbalance, this paper proposes a novel compensation method based on analysis and modeling of the error for a MSSG. Firstly, the angular velocity measurement principle of the MSSG is described. Then the analytical model of dynamic imbalance error has been established by solving the complex coefficient differential dynamic equations of the rotor. The generation mechanism and changing regularity of the dynamic imbalance error have been revealed. Next, a compensation method is designed to compensate the dynamic imbalance error and improve the measurement accuracy of the MSSG. The common issues caused by dynamic imbalance can be effectively resolved by the proposed method in gyroscopes with a levitating rotor. Comparative simulation results before and after compensation have verified the effectiveness and superiority of the proposed compensation method.

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Section: Analysis Of Dynamic Imbalance In a Mssgmentioning

confidence: 99%

“…In recent years, researchers have begun to develop inertial sensors based on magnetically suspended rotor, named magnetically suspended sensitive gyroscope (MSSG) [5][6][7]. A levitated rotor is supported by the magnetic pulls produced by the magnetic bearings in the stator, rotating at high angular velocity.…”

Section: Introductionmentioning

confidence: 99%

Analysis, Modeling and Compensation of Dynamic Imbalance Error for a Magnetically Suspended Sensitive Gyroscope

Xin¹,

Cai²,

Ren³

et al. 2016

Journal of Magnetics

View full text Add to dashboard Cite

show abstract

“…By increasing the feedback gain, the moment of inertia of the rotor and the angular velocity of the rotor about the principal axis, and by decreasing the moment of inertia of the rotor about the orthogonal axis to the principal one, the frequency region for angular velocity detection can be expanded. Due to lack of effective error compensation, the amplitude error is as high as 10% in the angular velocity measurement [7][8][9]. Jiancheng Fang proposed a magnetically suspended control moment gyroscope, which can work in two modes of actuator and attitude sensor [10].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Drift Error from Stator of A MSSG with Double Spherical Envelope Surfaces

Xin¹,

Cai²,

Ren³

et al. 2016

Journal of Electrical Engineering and Technology

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-For the newly developing magnetically suspended sensitive gyroscope (MSSG) with double spherical envelope surfaces, it is necessary to analyze the causes of drift error to improve sensing accuracy. This paper builds the models of disturbing torques generated by stator assembly and process errors based on the geometric construction and running regularity of the MSSG, and further reveals the generation mechanism of the drift error. Then the drift error from a single stator magnetic pole is calculated quantitatively with the established model, and the key factors producing the drift error are further discussed. It is proposed that the main approaches in reducing the drift error from stator are guaranteeing the rotor envelope surface to be an ideal spherical and improving the controlling precision of rotor displacement. The common problems associated in a gyroscope with a spherical rotor can be effectively resolved by the proposed method. This analysis provides a reference for the structure optimization and error compensation of a MSSG.

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“…Their research proves the technical feasibility and shows the potential of high-precesion and high-bandwidth of MSSGs. However, due to lack of effective error compensation, the amplitude error is as high as 10% in the angular velocity measurement [6][7][8]. Fang J. et al proposed a magnetically suspended control moment gyroscope, which can work in two modes of actuator and attitude sensor [9].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Drift Error in a MSSG with Double Spherical Envelope Surfaces

Xin¹,

Cai²,

Ren³

et al. 2016

Journal of Magnetics

View full text Add to dashboard Cite

To improve the sensing accuracy of the newly developed magnetically suspended sensitive gyroscope (MSSG), it is necessary to analyze the causes of drift error. This paper build the models of disturbing torques generated by stator assembly errors based on the geometric construction of the MSSG with double spherical envelope surfaces, and further reveals the generation mechanism of the drift error. Then the drift error from a single stator magnetic pole is calculated quantitatively with the established model, and the key factors producing the drift error are further discussed. It is proposed that the main approaches in reducing the drift error are guaranteeing the rotor envelope surface to be an ideal spherical and improving the controlling precision of rotor displacement. The common problems associated in a gyroscope with a spherical rotor can be effectively resolved by the proposed method.

show abstract

Extension of measurement bandwidth in an AMB-based gyroscopic sensor

Cited by 10 publications

References 6 publications

Analysis, Modeling and Compensation of Dynamic Imbalance Error for a Magnetically Suspended Sensitive Gyroscope

Analysis, Modeling and Compensation of Dynamic Imbalance Error for a Magnetically Suspended Sensitive Gyroscope

Modeling and Analysis of Drift Error from Stator of A MSSG with Double Spherical Envelope Surfaces

Modeling and Analysis of Drift Error in a MSSG with Double Spherical Envelope Surfaces

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