Centroid error compensation method for a star tracker under complex dynamic conditions

Tan, Weijie; Qin, Shiqiao; Myers, R; Morris, Tim; Jiang, Guangwen; Zhao, Yiwei; Wang, Xingshu; Ma, Liheng; Dai, Dahai

doi:10.1364/oe.25.033559

Cited by 15 publications

(3 citation statements)

References 15 publications

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“…e z-axis is aligned with the Earth's rotation axis and vertical to the equatorial plane. e y-axis completes a right-handed frame [16]. e ship body coordinate system (b-frame) is rigidly attached to the ship and its origin (O b ) is at the ship's mass center.…”

Section: Theory Of Avm Methods For Ship Angularmentioning

confidence: 99%

An Error Evaluation Method for the Ship Angular Flexure Measurement Based on the Principle of Relevance

Zhang

Ma²,

Qin

et al. 2019

Mathematical Problems in Engineering

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Due to the lack of true ship angular flexure data, it is difficult to evaluate its measurement error of the angular velocity matching method in practice. In this paper, the cause of the measurement error of the ship flexure angle is analyzed in theory, and an evaluation method for the ship angular flexure measurement error based on the principle of relevance is proposed. The proposed method provides a prediction formula to describe the estimation error of the static flexure angle based on the off-diagonal elements of the error covariance matrix P in Kalman filtering. In addition, the optimized coefficient F is introduced to make the prediction error range better describe the real error variation. The optimized coefficient F ensures that the proposed formula has good prediction effects in all three directions. Simulations based on the actual measured ship flexure data are carried out, and the simulation results verify the capability of the prediction formula. The proposed method can be used in the evaluation of the ship flexure measurement error.

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Section: Theory Of Avm Methods For Ship Angularmentioning

confidence: 99%

An Error Evaluation Method for the Ship Angular Flexure Measurement Based on the Principle of Relevance

Zhang

Ma²,

Qin

et al. 2019

Mathematical Problems in Engineering

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“…The gyroscope units coordinate system (denoted by g in subscript) has its

and

axes consistent with the three mutually orthogonal sensitive axes of the gyroscope units as shown in Figure 1 a [ 23 ].…”

Section: Theory Of the Comprehensive Calibration Methods For The Stmentioning

confidence: 99%

“…The image plane coordinate system (denoted by p in subscript) is a two-dimensional rectangular plane coordinate system with its origin at the detector center, and its

and

axes are parallel to the two vertical edges of the detector plane respectively as shown in Figure 1 b [ 23 ].…”

Section: Theory Of the Comprehensive Calibration Methods For The Stmentioning

confidence: 99%

A Comprehensive Calibration Method for a Star Tracker and Gyroscope Units Integrated System

Tan

Dai

et al. 2018

Sensors

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The integration of a star tracker and gyroscope units (GUs) can take full advantage of the benefits of each, and provide continuous and accurate attitude information with a high update rate. The systematic error calibration of the integrated system is a crucial step to guarantee its attitude accuracy. In this paper, a comprehensive calibration method for the star tracker and GUs integrated system is proposed from a global perspective. Firstly, the observation model of the predicted star centroid error (PSCE) with respect to the systematic errors including the star tracker intrinsic parameter errors, GUs errors and fixed angle errors is accurately established. Then, the systematic errors are modeled by a series of differential equations, based on which the state-space model is established. Finally, the systematic errors are decoupled and estimated by a Kalman filter according to the established state-space model and observation model. The coupling between the errors of the principal point and subcomponents of the fixed angles (i.e., normalΨx and normalΨy) is analysed. Both simulations and experiments indicate that the proposed method is effective at estimating the systematic errors of the star tracker and GUs integrated system with high accuracy and robustness with respect to different star centroid accuracies and gyroscope noise levels.

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Inertial information based star detection for airborne star sensor

Lei¹,

Li²,

Wei³

et al. 2023

Optics & Laser Technology

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Centroid error compensation method for a star tracker under complex dynamic conditions

Cited by 15 publications

References 15 publications

An Error Evaluation Method for the Ship Angular Flexure Measurement Based on the Principle of Relevance

An Error Evaluation Method for the Ship Angular Flexure Measurement Based on the Principle of Relevance

A Comprehensive Calibration Method for a Star Tracker and Gyroscope Units Integrated System

Inertial information based star detection for airborne star sensor

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