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• W2626524254 abstract "Abstract Dual-arm space robots are more capable of implementing complex space tasks compared with single arm space robots. However, the dynamic coupling between the arms and the base will have a serious impact on the spacecraft attitude and the hand motion of each arm. Instead of considering one arm as the mission arm and the other as the balance arm, in this work two arms of the space robot perform as mission arms aimed at accomplishing secure capture of a floating target. The paper investigates coordinated control of the base's attitude and the arms' motion in the task space in the presence of system uncertainties. Two types of controllers, i.e. a Sliding Mode Controller (SMC) and a nonlinear Model Predictive Controller (MPC) are verified and compared with a conventional Computed-Torque Controller (CTC) through numerical simulations in terms of control accuracy and system robustness. Both controllers eliminate the need to linearly parameterize the dynamic equations. The MPC has been shown to achieve performance with higher accuracy than CTC and SMC in the absence of system uncertainties under the condition that they consume comparable energy. When the system uncertainties are included, SMC and CTC present advantageous robustness than MPC. Specifically, in a case where system inertia increases, SMC delivers higher accuracy than CTC and costs the least amount of energy." @default.
• W2626524254 created "2017-06-23" @default.
• W2626524254 creator A5008606566 @default.
• W2626524254 creator A5063247063 @default.
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• W2626524254 date "2017-09-01" @default.
• W2626524254 modified "2023-09-29" @default.
• W2626524254 title "Robust coordinated control of a dual-arm space robot" @default.
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• W2626524254 doi "https://doi.org/10.1016/j.actaastro.2017.06.009" @default.
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