Unbalance and Harmonic disturbance attenuation of a flexible shaft with active magnetic bearings

Noshadi, Amin; Zolfagharian, Ali

doi:10.1016/j.ymssp.2019.04.055

Cited by 15 publications

(5 citation statements)

References 38 publications

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“…Lusty et al [193] used the H∞ control method to suppress the vibration of the active magnetic actuator to the hollow shaft, reducing the vibration amplitude of the rotor in the system by more than 70%, and avoiding the excessive excitation of the flexible AMB support structure. Noshadi et al [194] proposed a control method consisting of an outer-loop H∞ controller and a repetitive disturbance observer-based controller (RDOBC). After adding RDOBC to the overall control loop, the overall vibration of the system at high speed is significantly reduced.…”

Section: Robust Controlmentioning

confidence: 99%

Magnetic Bearing: Structure, Model and Control strategy

Huang,

Li,

Zhou

et al. 2023

Preprint

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Bearings are crucial transmission components that offer support to mechanical rotating bodies. Nevertheless, traditional bearing failure due to friction and wear more easily. In scenarios involving ultra-high speeds and extreme applications, minimizing bearing losses and enhancing performance becomes especially vital. Magnetic bearings, characterized by zero friction, no need for lubrication, and high-speed capabilities, offer a viable solution to the issue of bearing failure attributed to friction. However, there is currently a shortage of comprehensive review literature that delves into the structural attributes, modeling mechanisms, and control strategies of magnetic bearings. This article will perform a comprehensive literature review on magnetic bearings, addressing the aforementioned aspects and discussing their core technologies. Firstly, from the perspective of classification and magnetic circuit structure analysis, the properties and characteristics of various magnetic bearings are discussed. Secondly, the working principle and performance of mathematical models of magnetic bearings with different structures are described, and the modeling steps and optimization schemes are summarized. Furthermore, the influence of control strategy of magnetic bearing on the control performance of magnetic bearing is summarized. Compared to PID control, modern control theory has achieved a performance improvement of nearly 50% in terms of improved position accuracy and adjustment time. Finally, the current research progress on magnetic bearings is summarized, and the current bottleneck issues are anticipated. This review contributes to a deeper understanding of the action mechanism and control method of magnetic levitation bearing, thus promoting the progress of magnetic levitation bearing technology.

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Section: Robust Controlmentioning

confidence: 99%

Magnetic Bearing: Structure, Model and Control strategy

Huang,

Li,

Zhou

et al. 2023

Preprint

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“…Srinivas et al [10] used an auxiliary AMB for fault identification and analysis of dual-coupled Jeffcott rotors supported by rolling-element bearings. The controllability of a flexible rotor against various unbalances was advanced by Noshadi and Zolfagharian [21], e.g., for unbalance and harmonic disturbance attenuation of a flexible rotor.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a High-Power AMB–Multirotor Drivetrain

Jastrzebski,

Putkonen,

Zhuravlev

et al. 2024

IEEE Trans. Ind. Electron.

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Active magnetic bearings are commonly applied in high-speed rotors in the medium to high power range to replace rolling-element or oil-film bearings. They require less maintenance and provide a number of unique benefits owing to their contactless suspension and active control. A rotor construction with integrated compressors or turbines results in predictable and controllable rotor dynamics, where model-based controllers can be used. Model-based centralized controllers outperform decoupled transfer function controllers, but they require accurate plant models. For integrated impellers on a single rotor, the control models comprise a rigid rotor and the lowest frequency bending modes. The bending mode frequency and parameters related to node locations can be identified, yielding controllers tuned to the application. This work introduces drivetrain modeling and magnetic levitation control of a 2 MW rotor and an external load attached to the electric machine rotor with a radially stiff but flexural coupling. The model-based control is tested in an experimental setup, and the drivetrain frequency responses are compared with the modeled multirotor drivetrain dynamics.

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“…[18] proposed methodology for identification of a flexible rotor. The control-lability of a flexible rotor for various unbalance was advanced in [19], e.g. for unbalance and harmonic disturbance of flexible rotor.…”

Section: Introductionmentioning

confidence: 99%