A transfer alignment method for inertial attitude correction of spherical motor on moving base

Dai, Wang; Zhang, Chao; Mao, Yao; Bai, Kun

doi:10.1088/1361-6501/ac0e5e

Cited by 3 publications

(2 citation statements)

References 24 publications

(33 reference statements)

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“…On the other hand, the master and slave INSs are respectively installed on the carrier and payload, and the flexible deformation between these two INSs changes with various factors such as the structural characteristics of carrier, maneuver condition and external random interference [16,17]. Therefore, flexible deformation is another key factor that constrains the transfer alignment accuracy [4,18,19].…”

Section: Introductionmentioning

confidence: 99%

A high-accuracy system model and accuracy evaluation method for transfer alignment

Yang,

Wang,

Wang

et al. 2024

Meas. Sci. Technol.

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With the increasing demand for high-accuracy navigation, distributed payloads put forward higher requirements for the initial alignment accuracy of their equipped slave inertial navigation systems (INSs). However, the existing transfer alignment models have poor compensation effect on flexible deformation, resulting in low alignment accuracy. Moreover, these models cannot accurately evaluate the accuracy of transfer alignment due to ignoring the errors of the master INS. To address these two problems, a new high-accuracy transfer alignment system model is established by comprehensively considering errors of the master and slave INSs. Further, the propagation characteristics of the master and slave inertial sensor errors in transfer alignment are analyzed, and the relationship expression between the master and slave inertial sensor accuracy and the transfer alignment accuracy is derived. Thus, the accuracy of transfer alignment can be pre-evaluated according to the master and slave inertial sensor accuracy. The experiment results show that the alignment accuracy of the proposed method is improved by more than 71.56% compared with the traditional methods, and the relative errors between the proposed accuracy evaluation method and the Monte Carlo simulations are less than 9.14%. Thus, the correctness, effectiveness and superiority of the proposed method are verified.

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Section: Introductionmentioning

confidence: 99%

A high-accuracy system model and accuracy evaluation method for transfer alignment

Yang,

Wang,

Wang

et al. 2024

Meas. Sci. Technol.

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“…In recent decades, the identification of spherical rotation direction and angle measurement techniques have been researched and developed [ 11 , 12 ]. Several measurement methods based on different principles have emerged, which mainly include optical [ 13 , 14 ], magnetic [ 15 ], and inertial fields [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Combined Method for Measuring the Three-Dimensional Rotational Angle of a Spherical Joint

Yang,

Ouyang,

Yang

et al. 2023

Sensors

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To improve the measurement accuracy of the three-dimensional rotation angle of a spherical joint, a novel approach is proposed in this study, which combines magnetic detection by a Hall sensor and surface feature identification by an eddy current sensor. Firstly, a permanent magnet is embedded in the ball head of a spherical joint, and Hall sensors are set and distributed in the ball socket to measure the variation in the magnetic flux density when the spherical joint rotates, which are related to the 3D rotation angle. In order to further improve the measurement accuracy and robustness, we also set grooves on the ball head and use eddy current sensors to synchronously identify the rotation angle of the ball head. After the combination of two signals is performed, a measurement model is established using the RBF neural network by training, and the real-time measurement of the 3D rotation angle of the spherical joint is realized. The feasibility and superiority of this method are validated through experiments. The experimental results indicate that the measurement accuracy is substantially promoted compared to the preliminary measurement scheme based on spherical coding; the average measurement error of the single axis is reduced by 9′9″. The root mean square errors for the measurements of the 3D rotation angles in this proposed method are as follows: pitch angle α has an error of 1′8″, yaw angle β has an error of 2′15″, and roll angle γ has an error of 29′6″.

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Comparative Study of CKF and UKF in Dimensionality Reduction Fast Transfer Alignment of Inertial Navigation Systems of Shipborne Equipment

Wang,

Xu,

2024

2024 7th International Conference on Advanced Algorithms and Control Engineering (ICAACE)

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A transfer alignment method for inertial attitude correction of spherical motor on moving base

Cited by 3 publications

References 24 publications

A high-accuracy system model and accuracy evaluation method for transfer alignment

A high-accuracy system model and accuracy evaluation method for transfer alignment

A Novel Combined Method for Measuring the Three-Dimensional Rotational Angle of a Spherical Joint

Comparative Study of CKF and UKF in Dimensionality Reduction Fast Transfer Alignment of Inertial Navigation Systems of Shipborne Equipment

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