Reduction of the High-Speed Magnetically Suspended Centrifugal Compressor Harmonic Vibration Using Cascaded Phase-Shifted Notch Filters

He, Jiaxi; Deng, Zhiquan; Peng, Cong; Li, Kexiang

doi:10.1109/jsen.2020.3017953

Cited by 14 publications

(3 citation statements)

References 21 publications

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“…In 2016, Cui et al proposed a multichannel phase-shift notch filter to suppress harmonic currents in magnetically suspended flywheel system [39]. In 2020, He et al proposed a cascade phase notch filter to suppress harmonic vibration in high-speed magnetically centrifuges [40], in which a resonant controller is used in parallel to each frequency to form a multi-resonant controller. Peng et al proposed a novel multi-resonant controller to suppress harmonic current in the magnetically suspended flywheel system [41].…”

Section: Control Methods Of Harmonic Vibration Of Magnetically Suspen...mentioning

confidence: 99%

Review on Active Vibration Control Method of Magnetically Suspended System

Han,

Cai,

Han

et al. 2023

IEEE Access

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Recently, magnetic bearings have been widely used in inertial actuators of spacecraft. Aiming at the problem of unbalanced vibration in magnetically suspended system, the research status of active vibration control method is described in detail. Firstly, the structure and working principle of magnetically suspended system are introduced, and the causes of unbalanced vibration are expounded. Then, the research status of active vibration control methods at home and abroad is introduced from two aspects of synchronous vibration and harmonic vibration, and the advantages and disadvantages of each control method are summarized. Finally, the future development trend of active vibration control technology for magnetically suspended system is prospected.

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Section: Control Methods Of Harmonic Vibration Of Magnetically Suspen...mentioning

confidence: 99%

Review on Active Vibration Control Method of Magnetically Suspended System

Han,

Cai,

Han

et al. 2023

IEEE Access

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show abstract

“…Additionally, it will cause the casing to vibrate and generate noise, which reduces the service life of machinery. In addition, the rotor unbalance can even result in the saturation of the magnetic actuator due to the limited force capacity [9,10]. There are methods to suppress the unbalanced centrifugal forces while the rotor is spinning.…”

Section: Introductionmentioning

confidence: 99%

Field Dynamic Balancing for Magnetically Suspended Turbomolecular Pump

Chen

Li²

2023

Sensors

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A field dynamic balancer is crucial to the applications of magnetically suspended turbomolecular pumps. Therefore, this paper presents a novel field dynamic balancing method based on autocentering control mode without any additional instrumentation. Firstly, the dynamics of the active magnetic bearing rotor system with unbalance are modeled. Through model analysis, it was found that making the rotor rotate around the geometric axis can improve the accuracy of dynamic balancing. Secondly, the relationship between the correcting masses and the synchronous currents based on the influence coefficient method is established. Then, an autocentering controller is designed to make the rotor rotate around the geometric axis. The synchronous currents can be detected and extracted by the current transducers to calculate the unbalance correction mass. Finally, the experimental results show that this novel field dynamic balancing method can effectively eliminate the majority of rotor unbalance. Compared with the original unbalance of a rotor, the synchronous current in the A-end has been reduced by 71.4% and the synchronous current in the B-end, by 90.8% with the proposed method.

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“…These methods can effectively restrain the current oscillation. In practice, AMB's rotor might contain current oscillations of multi-frequencies, and the most common method is applying multiple notch filters to the AMB controller [11]- [14].…”

mentioning

confidence: 99%

Vibration Suppression for Active Magnetic Bearings Using Adaptive Filter with Iterative Search Algorithm

Ye,

Shi,

et al. 2024

Trans. Electr. Mach. Syst.

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Active Magnetic Bearing (AMB) is a kind of electromagnetic support that makes the rotor movement frictionless and can suppress rotor vibration by controlling the magnetic force. The most common approach to restrain the rotor vibration in AMBs is to adopt a notch filter or adaptive filter in the AMB controller. However, these methods cannot obtain the precise amplitude and phase of the compensation current. Thus, they are not so effective in terms of suppressing the vibrations of the fundamental and other harmonic orders over the whole speed range. To improve the vibration suppression performance of AMBs, an adaptive filter based on Least Mean Square (LMS) is applied to extract the vibration signals from the rotor displacement signal. An Iterative Search Algorithm (ISA) is proposed in this paper to obtain the corresponding relationship between the compensation current and vibration signals. The ISA is responsible for searching the compensating amplitude and shifting phase online for the LMS filter, enabling the AMB controller to generate the corresponding compensation force for vibration suppression. The results of ISA are recorded to suppress vibration using the Look-Up Table (LUT) in variable speed range. Comprehensive simulations and experimental validations are carried out in fixed and variable speed range, and the results demonstrate that by employing the ISA, vibrations of the fundamental and other harmonic orders are suppressed effectively.

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Reduction of the High-Speed Magnetically Suspended Centrifugal Compressor Harmonic Vibration Using Cascaded Phase-Shifted Notch Filters

Cited by 14 publications

References 21 publications

Review on Active Vibration Control Method of Magnetically Suspended System

Review on Active Vibration Control Method of Magnetically Suspended System

Field Dynamic Balancing for Magnetically Suspended Turbomolecular Pump

Vibration Suppression for Active Magnetic Bearings Using Adaptive Filter with Iterative Search Algorithm

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