Sampled-data output feedback regulation of magnetic levitation system

Zaheer, Asim; Mehdi, Niaz

doi:10.1109/isie.2013.6563789

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…The maglev system is widely used in electric generators, the attitude control of satellite, maglev miniature motor and so on, due to its advantages of high efficiency, low cost and adaptability in special environments [1]. On the other hand, the maglev system has serious uncertain nonlinearities and belongs to the open-loop unstable class, so its control problem has received considerable attention [2,3].…”

Section: Introductionmentioning

confidence: 99%

Finite‐time stabilization of maglev system with an output constraint

Liu

Sun

Cai

et al. 2020

Asian Journal of Control

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This paper considers the problem of finite-time stabilization for the maglev system with an output constraint whose range depends on the experimental platform. A tan-type barrier Lyapunov function is introduced to guarantee that the output of the maglev system is restricted in the prescribed region and the state converges to zero in a finite time. The novelty lies in the fact that the design and the analysis for constrained and unconstrained output are unified without changing the structure of the controller. Finally, simulations are given to validate the effectiveness of the theoretical result.

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Section: Introductionmentioning

confidence: 99%

Finite‐time stabilization of maglev system with an output constraint

Liu

Sun

Cai

et al. 2020

Asian Journal of Control

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“…However, there is still a great challenge to realize the stable control for the maglev system due to its own characteristics such as open-loop instability, high nonlinearity and strong coupling. Most of papers involving maglev systems mainly focus on analyzing the system at the static state of suspension [2][3][4][5][6][7], without considering the control strategies and the dynamic response of the system in the levitating and landing process. As it is well known that few maglev control strategies have been proposed in most research on MYS, more attention has been paid to the control of maglev ball [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Maglev Yaw System of Wind Turbines and its Robust Trajectory Tracking Control in the Levitating and Landing Process Based on Ndob

Cai

Song

et al. 2018

Asian Journal of Control

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The yaw system is one of the important parts of the horizontal axis wind turbines. In this paper, a novel maglev yaw system (MYS) is introduced, a novel robust controller based on nonlinear disturbance observer (NDOB) is proposed to improve the dynamic suspension stability of the MYS in its levitating and landing process. First, the dynamic model of the MYS is built and analyzed as well as the model of the force caused by crosswind exerting on the MYS, and then the mathematical model of the MYS is derived from its dynamic model. Second, since the uncertain internal disturbance originated from the MYS itself exists, in order to realize the finite time convergence and improve the robustness of the MYS, a NDOB-based robust controller is designed via like nonsingular terminal sliding mode (LNTSM) method with the aid of backstepping design idea (BDI) to guarantee that the system output asymptotically tracks the reference trajectory, and the levitating and landing velocities of the MYS converge to their expectations globally and asymptotically in finite time. Finally, compared the conventional backstepping control (BC), the extensive simulation results show that the proposed robust controller has a better robustness and the MYS can realize smooth and reliable operations in its levitating and landing process in finite time, therefore the novel robust controller is substantiated to be effective and feasible.Key Words: Maglev yaw system (MYS), finite time, robust control, nonlinear disturbance observer based (NDOB), like nonsingular terminal sliding mode (LNTSM), backstepping design idea (BDI), backstepping control (BC).

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