De-spinning of tethered space target via partially invariable deployment with tension control

Wen, Hao; Jin, Dongping

doi:10.1007/s11071-019-04811-2

Cited by 19 publications

(1 citation statement)

References 23 publications

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“…The monotonicity condition of the cost function of a constrained MPC is guaranteed if any of the following terminal conditions is applied (i) terminal equality constraints, (ii) terminal set constraints, and (iii) terminal penalty function [31,32]. It is known that the terminal penalty function is superiority to the first two methods due to its wider feasible region [31,34]. where np K is the optimal Gain of an LQR controller with the same mpc Q and mpc P weighting matrices, which is obtained by solving the corresponding Riccati equation [31,32].…”

Section: Stability Analysis Of Proposed Mpc Problemmentioning

confidence: 99%

Model predictive control for electrodynamic tether geometric profile in orbital maneuvering with finite element state estimator

Zhu

2021

Nonlinear Dyn

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This paper studies the control of geometric profile of a librating electrodynamic tether by model predictive control using the induced electric current in tether only. First, a high-fidelity multiphysics model of an electrodynamic tether system is built based on the nodal position finite element method and the orbital-motion-limited theory. Second, a state estimator is proposed to estimate the geometric profile of a librating electrodynamic tether, where only the positions and velocities at the tether ends are measurable. The non-measurable geometric profile of tether between two ends is estimated by the high-fidelity multiphysics model with the input of the measurement at tether ends in the spatial domain. To avoid the singularity or ambiguity in the estimation, the geometric profile of tether is then propagated in the time domain by the extended Kalman filter. Third, the problem of controlling the geometric profile of a librating electrodynamic tether is converted into a trajectory tracking problem of the underactuated electrodynamic tether system, where the induced electric current in the tether is the only control input. The control input

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