A Two-Stage Synchronous Vibration Control for Magnetically Suspended Rotor System in the Full Speed Range

Peng, Cong; Zhu, Mengting; Wang, Kun; Ren, Yuan; Deng, Zhiquan

doi:10.1109/tie.2018.2890498

Cited by 51 publications

(17 citation statements)

References 31 publications

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“…One is automatic balance, and the other is unbalance compensation. The unbalance compensation method extracts the vibration signal with the same frequency as the rotation speed to generate a certain control force to balance the unbalance force and make the rotor rotate around its geometric axis [9,10]. In order to suppress synchronous vibration of the magnetic bearing rotor with gyroscopic effect and coupling, a novel cross-feedback notch filter is proposed in [11].…”

Section: Introductionmentioning

confidence: 99%

A Feed-Forward Control Strategy for Compensating Rotor Vibration of Six-Pole Radial Hybrid Magnetic Bearing With Fuzzy Adaptive Filter

Zhu¹,

Tang²

2021

PIER C

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In order to solve the problem that the unbalance vibration caused by rotor mass eccentricity of the six-pole radial hybrid magnetic bearing (HMB) seriously affects stability and security of the system, a feed-forward compensation control strategy for rotor unbalance vibration based on fuzzy leastmean-square (LMS) algorithm is proposed. Firstly, the structure, operation principle, and mathematical model of the six-pole radial HMB are introduced, and the cause of rotor vibration is analyzed and the dynamic equation of rotor deduced. Secondly, an LMS self-adapting filter is improved by using a fuzzy inference system, and the step size of the LMS algorithm is combined with the fuzzy control theory. By using the Takagi-Sugeno (TS) fuzzy inference machine system to adjust the step size of the algorithm, the filter output can approach the unbalance vibration signal smoothly and quickly, and realize the vibration compensation of the rotor. Finally, the simulations and experiments are carried out to verify that the proposed method can not only effectively suppress the unbalance vibration of the six-pole radial HMB rotor in real time but also have good compensation accuracy. The results show that the vibration compensation effect of fuzzy LMS algorithm is better than that of fixed step size filtering algorithm.

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Section: Introductionmentioning

confidence: 99%

A Feed-Forward Control Strategy for Compensating Rotor Vibration of Six-Pole Radial Hybrid Magnetic Bearing With Fuzzy Adaptive Filter

Zhu¹,

Tang²

2021

PIER C

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show abstract

“…Measures to reduce mass imbalance and bearing friction at the source were taken. Magnetic bearings, which have the advantage of no friction, and the capacity of active vibration control have been proposed to suppress harmonic vibrations based on notch filters (Peng et al, 2020). The vibration of the flywheel can also be supressed by mounting it on a vibration isolator.…”

Section: Introductionmentioning

confidence: 99%

High-frequency disturbance force suppression mechanism of a flywheel equipped with a flexible dynamic vibration absorber

Huang

Wang

et al. 2020

Journal of Vibration and Control

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Flywheels generate speed-related disturbances and induce micro-vibrations that influence the performance of high-sensitivity instruments on board. This study addresses dynamic modeling and disturbance force suppression of the flywheels due to its inherent characteristic structural modes. The disturbance force transmission of a rotating flywheel due to a unit radial force applied at the rim of the wheel body is reported using the three-dimensional finite element method and frequency response function–based substructuring method. The characteristic structural modes for the radial and axial disturbance forces are identified. The axial deformation–dominated flapping mode and the radial deformation–dominated transverse mode will contribute most to the axial and radial disturbance forces, respectively. A flexible ring structure, which is rested on the arms of the wheel body through independent viscoelastic pads and simultaneously in contact with the inner rim of the wheel body by independent resilient cushion members, is proposed to function as a damped dynamic vibration absorber. The modes of the dynamic vibration absorber and the modes of the flywheel equipped with the dynamic vibration absorber are analyzed. It is shown that the dynamic vibration absorber is effective to suppress both the radial and axial disturbance forces at the characteristic structural modes under different rotational speeds, provided that the loss factor of the complex elastic modulus for the viscoelastic pads is larger than 0.2 and the proportional damping constant for the stiffness matrix is larger than 6 Ns/m. Experimental analyses are conducted on a flywheel with a well-designed dynamic vibration absorber to validate the theoretical findings. Modal tests and disturbance force measurements are carried out for the flywheel with/without the dynamic vibration absorber. It is shown that the identified characteristic structural modes will contribute remarkable peaks for the radial and axial disturbance forces. The proposed dynamic vibration absorber is capable to suppress the high-frequency disturbance forces efficiently under different rotational speeds.

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“…More recently, Yu et al (2019) designed and implemented the cross-feedback control on an AMB-flywheel system and eliminated the instability caused by the gyroscopic effects. Similarly, Peng et al (2020) utilized the cross-feedback control to suppress gyroscopic effects on a hybrid axial-radial AMB with a rigid rotor. Later, AMB systems were modeled as linear parametervarying (LPV) models, and LPV controllers were investigated.…”

Section: Introductionmentioning

confidence: 99%

Robust control of active magnetic bearing systems with an add-on controller to cancel gyroscopic effects: Is it worth it?

Sahinkaya

Sawicki

2020

Journal of Vibration and Control

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One of the performance-limiting factors in the design of robust controllers for active magnetic bearing systems is the fact that the controller needs to be robust to the gyroscopic effects, that is rotational speed-dependent dynamics of the system. Studies in the literature show that better performance and stability can be achieved when gyroscopic effects are explicitly handled by a cross-feedback control for rigid rotor-active magnetic bearing systems. For flexible rotor-active magnetic bearing systems, gyroscopic effects are mainly dealt by defining the rotational speed as an uncertain parameter of the model or with linear parameter-varying controllers. This study explores the novel idea of compensating gyroscopic effects of a flexible rotor-active magnetic bearing system with an add-on controller and investigates its effects on the achieved performance of μ-controllers. The study is carried out on an experimental active magnetic bearing test rig with relatively high gyroscopic effects. An add-on controller is designed to compensate the gyroscopic effects of the first and second flexible modes of the rotor. Two μ-controllers are designed for the system: (1) benchmark controller that is designed using a standard control approach for active magnetic bearing systems and (2) controller designed with a modified model of the system in which the gyroscopic effects for the first and second flexible modes are reduced because of the presence of the add-on controller. Both controllers are implemented, and their performances are compared for initial levitation, run-up test from 0 to 10,000 r/min, orbit sizes at various speeds, and the computational cost of implementing each controller. The results suggest that better performance is potentially possible at the cost of significant increase in the computational complexity of the controller.

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A Two-Stage Synchronous Vibration Control for Magnetically Suspended Rotor System in the Full Speed Range

Cited by 51 publications

References 31 publications

A Feed-Forward Control Strategy for Compensating Rotor Vibration of Six-Pole Radial Hybrid Magnetic Bearing With Fuzzy Adaptive Filter

A Feed-Forward Control Strategy for Compensating Rotor Vibration of Six-Pole Radial Hybrid Magnetic Bearing With Fuzzy Adaptive Filter

High-frequency disturbance force suppression mechanism of a flywheel equipped with a flexible dynamic vibration absorber

Robust control of active magnetic bearing systems with an add-on controller to cancel gyroscopic effects: Is it worth it?

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