Abstract
In this work, we present a new control scenario for the adaptive drag-free control of gravity field satellites in displacement mode, where the control objective is to lock the position between the test mass and the outer satellite. The un-stability caused by the static electricity, the uncertainty of the sensors and actuators, and the disturbance of the attitude movement propose great challenge for the controller design of the drag-free loop. Characteristic model is introduced to simplify the modeling of the complicated nonlinear dynamics. Then, a novel adaptive control strategy is developed, which is constituted by an extended state-and-parameter estimator and a modified all-coefficient controller. The scheme can not only stabilize the unstable plant, but cope with the uncertainties as well as measurement noises, providing a simple and effective solution for practical applications. Finally, simulations are performed on a gravity field satellite, illustrating that our approach yields good control performance.
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Acknowledgements
The work is supported by National Key R&D Program of China under Grant 2018YFA0703800, and Foundation of Science and Technology on Space Intelligent Control Laboratory under Grant ZDSYS-2018-04.
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Wang, L., Gou, X., Liu, Q., Meng, B. (2022). Adaptive Drag-Free Control of Gravity Field Satellites via a Modified Characteristic Model-Based Approach. In: Yan, L., Duan, H., Yu, X. (eds) Advances in Guidance, Navigation and Control . Lecture Notes in Electrical Engineering, vol 644. Springer, Singapore. https://doi.org/10.1007/978-981-15-8155-7_43
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DOI: https://doi.org/10.1007/978-981-15-8155-7_43
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