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Numerical Prediction on the Flow Field of Molten Steel and the Trajectory of Inclusion in Continuous Casting Mold Effected by electromagnetic Field

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Journal of Iron and Steel Research International 1999年第1期6卷 1-7页

作者： Li Baokuan Zhang Yongjie He Jicheng Northeastern University Beijing University of Science and Technology

Through coupling electromagnetic field equations with turbulent flow equations,the numerical prediction has been conducted on the flow field of molten steel and the trajectory of inclusion particle in the continuous casting mold effected by electromagnetic *** difference between the maximum and the minimum of the shear stress on mold wall is used to scale the impingement strength of molten steel discharged from immersed nozzle to the solidifying shell on the narrow wall of *** flow field of molten steel in the mold is changed greatly and the impingement strength of the jet is reduced while electromagnetic field is *** is found that the successful control of flow field depends on the current and location of *** the same time,the new floating paths of inclusion particles are formed and the upward particles that are far away from the solidifying zone on the narrow wall of mold change their moving directions with the change of flow field,so that the particles can avoid being entrapped by the solidifying shell.

关键词： continuous casting mold flow field trajectory of inclusion electromagnetic control

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Stability Analysis of the Active Disturbance Rejection controller for electromagnetically controlled Spacecraft Clusters

Stability Analysis of the Active Disturbance Rejection Contr...

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第37届中国控制会议

作者： Mingqi Yang Chengsheng Gao Min Hu Jiahui Xu Space Engineering University

An active disturbance rejection control（ADRC） method is proposed for configuration maintenance of an electromagnetically controlled spacecraft *** this paper,the stability of the ADRC controller is ***,the ADRC controller is ***,a Lyapunov function is constructed,and according to the positive definiteness of Lyapunov function matrix,a sufficient condition for ADRC controller is ***,numerical simulations are performed to verify the effectiveness of the controller,and the controller is confirmed to be Lyapunov asymptotically stable.

关键词： Spacecraft cluster electromagnetic control active disturbance rejection control(ADRC) extended state observer (ESO) Lyapunov asymptotically stable

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