Resonance Vibration Control for AMB Flexible Rotor System Based on<i>µ</i>-Synthesis Controller

Ran, Shaolin; Hu, Yefa; Wu, Huachun; Cheng, Xin

doi:10.1155/2018/4362101

Cited by 11 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2. Assuming that the unbalanced force of the rotor is supported by the left and right radial magnetic bearings, so the original unbalanced force on the rotor can be equivalent to the positions of the two active magnetic bearings by using the equivalent principle [6,7] . Therefore, the aim of controlling the unbalanced force of the rotor system can be achieved by restraining the equivalent unbalanced force of bearing position.…”

Section: Principle Of the Influence Coefficient Methodsmentioning

confidence: 99%

Online unbalanced vibration suppression of a flexible rotor supported by active magnetic bearing

2020

Proceedings of 1st International Electronic Conference on Actuator Technology: Materials, Devices and Applications

Self Cite

View full text Add to dashboard Cite

A rotor supported by active magnetic bearing could offer various advantages over conventional bearings, but due to their limited force capacity, and moreover, the rotor has a mass unbalance. The vibration originated from the rotor's unbalance mass impacts on the dynamic properties, and even cause major accidents. Large unbalance is typically responsible for high energy vibrations and the consequent decrease in machine life. So unbalance compensation on the rotating machine is necessary, especially for the high speed flexible rotor. While the unbalanced vibration suppression need shutdown and phase sensor. To solve the problem of online suppress the unbalance vibration without adding additional hardware equipment in active magnetic bearingrotor system, this paper proposes an online unbalanced vibration suppression based on the crosscorrelation method and influence coefficient method. The amplitude and phase are achieved by cross-correlation method and feedback tracking control method in steady state. The active magnetic bearings are used to simulate the unbalanced excitation, the compensation amplitude of unbalance vibration signal are calculated by the influence coefficient method. The method was found to be effective and practical. An online test program was performed on a flexible rotor based on based on the Matlab/Simulink and a dSPACE real time system, which showed that the unbalanced vibration suppression could satisfy the performance and required precision of rotating machine, and the amplitude of the fundamental frequency of the unbalance vibration is significantly reduced.

show abstract

Section: Principle Of the Influence Coefficient Methodsmentioning

confidence: 99%

Online unbalanced vibration suppression of a flexible rotor supported by active magnetic bearing

2020

Proceedings of 1st International Electronic Conference on Actuator Technology: Materials, Devices and Applications

Self Cite

View full text Add to dashboard Cite

show abstract

“…A bridge circuit can control the current of one coil, but is not sufficient to control the motion of the rotor in one DOF. This is because the electromagnetic force has a strong nonlinear characteristic, so an AMB generally adopts differential control with two coils controlling one DOF motion [14], as shown in Figure 2, and the electromagnetic force can be linearized when the rotor is near the center position. Therefore, the complete suspension of the rotor requires two radial AMBs, as shown in Figure 1.…”

Section: Topologies Of Amb Amplifiersmentioning

confidence: 99%

Evaluation of Switching Power Amplifier Topology for Active Magnetic Bearings

Yang

Guo

et al. 2021

Actuators

Self Cite

View full text Add to dashboard Cite

Active magnetic bearings (AMBs) have led to great progress in the field of rotating machinery due to their many advantages, such as their non-contact and non-lubrication properties. As the key component of an AMB actuator, the switching power amplifier has an important impact on the performance of magnetic bearings and rotating machinery. In this paper, the topologies of switching power amplifiers for AMBs are introduced. The traditional half-bridge topology and two newly proposed topologies—the three-phase-half-bridge and neutralized-sharing-bridge topology—are analyzed and discussed. The volume, current output performance and cost of the power amplifier with different topologies are comprehensively evaluated, providing a theoretical basis and guidance for the selection and design of the topology of switching power amplifiers for AMBs under different conditions.

show abstract

“…For the vibration control of flexible and long rotors, an experimental and theoretical analysis is carried out in [9], and the multivariable nature of controllers is emphasized in [10]. Moreover, it has been shown that there exist controllers that suppress vibrations at resonance [11].…”

Section: Introductionmentioning

confidence: 99%

Comparing the Performance of Robust Controllers for Vibration Suppression in Long Rotor Systems

Aleyaasin

2024

Acoustics

View full text Add to dashboard Cite

In this paper, the vibration control of the multivariable model of rotor bearing systems is considered for investigation. Some simply structured controllers that can suppress vibrational disturbances are tested for their robustness via the H∞ optimality criteria. Initially, intelligent optimisation techniques are used to minimize the H∞ mixed-sensitivity norm of the Linear Fractional Transformation (LFT) of the simple two-term PI controllers acting on the rotor system models. This results in some controllers that can suppress the vibration but with a slow oscillatory response. After this, an appropriate interpretation of the Bode plot singular values of the combined sensitivity and control effort matrix is used to explain the performance shortcomings of this controller. Moreover, the existing simply structured controllers in the literature exhibiting a faster performance are examined by using singular value plots. It is shown that when the maximum singular value of the control effort matrix drops below the 0 db line, the performance will be boosted. Finally, the H∞ controllers are designed by using the robust control toolbox in MATLAB. This resulted in rapid disturbance rejection, with the vibration amplitude diminishing to zero after 0.3 s due to double-step disturbances. However, these controllers in the frequency domain have an order of eight and may not be realizable to be implemented in practice. It is concluded that examining the Bode plot of the maximum singular value of the control effort matrix is a useful tool for evaluating performance in the frequency domain. However, designing robust controllers by toolboxes in the time domain can lead to superb performance with higher-order controllers.

show abstract

Resonance Vibration Control for AMB Flexible Rotor System Based onµ-Synthesis Controller

Cited by 11 publications

References 22 publications

Online unbalanced vibration suppression of a flexible rotor supported by active magnetic bearing

Online unbalanced vibration suppression of a flexible rotor supported by active magnetic bearing

Evaluation of Switching Power Amplifier Topology for Active Magnetic Bearings

Comparing the Performance of Robust Controllers for Vibration Suppression in Long Rotor Systems

Contact Info

Product

Resources

About