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Cheng Qian,Shuzong Chen,Changchun Hua,Kyoung-Su Park 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.5
This paper studied the fixed-time prescribed performance torsional vibration suppression control for the transmission system with actuator faults. Firstly, a novel electromechanical coupling torsional vibration model was established on the basis of the Lagrangian equation with the dissipation term and Kirchhoff’s law, which considered the nonlinear damping, nonlinear stiffness and the mechanical-electrical coupling relationship. Subsequently, an asymmetric fixed-time predetermined performance function was introduced to ensure that the state errors can converge in a given region in the fixed time, and a torsional vibration suppression control strategy with actuator faults was designed. A stability analysis indicated that the designed torsional vibration system was stable, and the performances of the transformed states were preserved. Finally, the transmission system of the rolling mill was selected as a research object for simulation testing, and the results illustrate the validity of the proposed algorithm.
Distributed Control for Uncertain Nonlinear Multiagent Systems Subject to Hybrid Faults
Chang-chun Hua,Zhijie Li,Kuo Li,Shuzong Chen,Jie Sun 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.10
This paper investigates a distributed consensus control problem for a class of uncertain nonlinear multiagent systems with hybrid faults. Most of the existing works about consensus control for multi-agent systems solely consider either actuator faults or process faults. Different from the works, the more comprehensive hybrid faults are proposed which mainly focusing on both process and actuator faults occur simultaneously. For the nonlinear multiagent systems with uncertainties, we propose a less conservative consensus strategy which relaxes the conservative condition on nonlinear terms. Subsequently, the novel distributed consensus strategy is proposed with the help of a backstepping design method. Based on the Lyapunov stability theory, it is proved strictly that the proposed controllers make the followers reach an agreement on a certain quantity of common interest. Finally, a simulation example is given to verify the effectiveness of the theoretical result.