VI: FUTURE CONCEPTS: Attitude and Drag Control: An Application to the GOCE Satellite

Canuto, Enrico; Martella, P.; Sechi, G.

doi:10.1023/a:1026139811741

Cited by 20 publications

(2 citation statements)

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“…The gold wire discharge method provides a solution to the problem of charge accumulation in TM [28], which is used in tasks such as GRACE [29] and GOCE [30]. However, it is difficult to meet the index requirements of spaceborne gravitational wave detection owing to the mechanical connection stiffness and additional loss of the gold wire.…”

Section: Introductionmentioning

confidence: 99%

Test mass charge estimation for the space inertial sensor with extended Kalman filter

Gu,

Cheng,

Hong

et al. 2024

Meas. Sci. Technol.

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Charge Management System (CMS), aimed at mitigating charge-induced noise on an isolated free-falling test mass (TM), is a crucial component of space inertial sensors in various spaceborne gravitational missions. The estimation of TM charge is one of the tasks of CMS, directly impacting CMS performance. However, current methods for TM charge estimation suffer from slow response and significant estimation errors. This paper presents a new charge estimation method that combines the force modulation principle with an extended Kalman filter (EKF). We analyzed the relationship between the TM surface potential and TM motion, then established a mathematical model. The estimation of TM charge is accomplished through the EKF algorithm. A charge estimation simulation model was developed in Simulink, and experiments were conducted to evaluate the performance of the charge estimation methods under varying charge conditions. The experimental results demonstrate that the EKF method obtains more accurate estimation results and faster convergence rates, compared with Kalman Filter (KF) and Quadrature Demodulation (QD) methods. The KF and QD methods show larger errors when the estimated charge is greater than 106e order, meanwhile the QD method exhibits slower convergence rates. The presented method is expected to be beneficial for the CMS of on-orbit inertial sensors.

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Section: Introductionmentioning

confidence: 99%

Test mass charge estimation for the space inertial sensor with extended Kalman filter

Gu,

Cheng,

Hong

et al. 2024

Meas. Sci. Technol.

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“…are determined by the gradiometer; secondly, the non-conservative forces acting on the satellite are precisely compensated by the dragfree ion thruster (DFIT) associated with the attitude data of the satellite platform. [36] Because the influence of the non-conservative force is efficiently deducted from the SGG observations, the accuracy of the Earth's gravitational field recovery is highly improved. Since Eötvös [37] designed the first gradiometer (Eötvös torsion balance) at the beginning of the 20th century, the gradiometers have developed from monoaxial rotation to triaxial orientation, from room temperature to low temperatures (below 4.2 K) and from torsion and electrostatic suspension to superconduction and cold-atom interferometry, and the measurement accuracy of the gradiometer has also been increasingly improved.…”

Section: Introductionmentioning

confidence: 99%

A contrastive study on the influences of radial and three-dimensional satellite gravity gradiometry on the accuracy of the Earth's gravitational field recovery

Zheng¹,

Hsu²,

Zhong³

et al. 2012

Chinese Phys. B

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The accuracy of the Earth's gravitational field measured from the gravity field and steady-state ocean circulation explorer (GOCE), up to 250 degrees, influenced by the radial gravity gradient Vzz and three-dimensional gravity gradient Vij from the satellite gravity gradiometry (SGG) are contrastively demonstrated based on the analytical error model and numerical simulation, respectively. Firstly, the new analytical error model of the cumulative geoid height, influenced by the radial gravity gradient Vzz and three-dimensional gravity gradient Vij are established, respectively. In 250 degrees, the GOCE cumulative geoid height error measured by the radial gravity gradient Vzz is about 2½ times higher than that measured by the three-dimensional gravity gradient Vij. Secondly, the Earth's gravitational field from GOCE completely up to 250 degrees is recovered using the radial gravity gradient Vzz and three-dimensional gravity gradient Vij by numerical simulation, respectively. The study results show that when the measurement error of the gravity gradient is 3 × 10−12/s2, the cumulative geoid height errors using the radial gravity gradient Vzz and three-dimensional gravity gradient Vij are 12.319 cm and 9.295 cm at 250 degrees, respectively. The accuracy of the cumulative geoid height using the three-dimensional gravity gradient Vij is improved by 30%–40% on average compared with that using the radial gravity gradient Vzz in 250 degrees. Finally, by mutual verification of the analytical error model and numerical simulation, the orders of magnitude from the accuracies of the Earth's gravitational field recovery make no substantial differences based on the radial and three-dimensional gravity gradients, respectively. Therefore, it is feasible to develop in advance a radial cold-atom interferometric gradiometer with a measurement accuracy of 10−13/s2−10−15/s2 for precisely producing the next-generation GOCE Follow-On Earth gravity field model with a high spatial resolution.

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ESO Based Adaptive Fault-Tolerant Control for Drag-Free Satellite

Mao

2023

Lecture Notes in Electrical Engineering

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VI: FUTURE CONCEPTS: Attitude and Drag Control: An Application to the GOCE Satellite

Cited by 20 publications

References 1 publication

Test mass charge estimation for the space inertial sensor with extended Kalman filter

Test mass charge estimation for the space inertial sensor with extended Kalman filter

A contrastive study on the influences of radial and three-dimensional satellite gravity gradiometry on the accuracy of the Earth's gravitational field recovery

ESO Based Adaptive Fault-Tolerant Control for Drag-Free Satellite

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