Offset-Free Model Predictive Control for a cone-shaped active magnetic bearing system

Molina, Luis M. Castellanos; Bonfitto, Angelo; Galluzzi, Renato

doi:10.1016/j.mechatronics.2021.102612

Cited by 23 publications

(3 citation statements)

References 22 publications

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“…The AMB unit with a distributed actuation model was designed to support a thin-walled rotor, and the dynamics of the AMB-rotor system were analyzed, results showed that the coupling effect between radial suspension force and axial suspension force was mitigated [32,33]. The AMB unit with a cone-shaped airgap was designed for a turbo compressor in an aircraft [34], and the conical AMB was compliant with a turbo compressor's specific stability requirement. However, the intrinsic coupling among magnetic forces in different DoFs still existed, and the complex model predictive control was designed to handle this problem.…”

Section: Introductionmentioning

confidence: 99%

Dynamic performance of three-DoF conical magnetic bearing in Vernier gimballing MSFW

Xiang,

Wang,

Liu

et al. 2024

Nonlinear Dyn

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For the 5-DoF gimballing magnetically suspended flywheel (MSFW), a three degrees of freedom (DoF) active magnetic bearing (AMB) with a conical gap is used as an electromagnetic actuator to suspend the flywheel (FW) rotor, so the gyro moment of gimballing MSFW is improved by actively deflecting FW rotor with the conical AMB. Firstly, the dynamic models of the FW rotor with the 3-DoF conical AMB are investigated, and the magnetic forces using the equivalent magnetic circuit and the FEM model are analyzed. Moreover, the coupling effect among three controllable DoFs of conical AMB is investigated when the position of the FW rotor sets at different values. Furthermore, the negative torques of conical AMB are studied when the FW rotor is stably suspended at the equilibrium position. The experimental results indicate that the controllable deflection angle of 3-DoF conical AMB reaches 1º, the coupling ratio among three controllable DoFs is reduced to 9%, and the negative torque during the active deflecting process is 0.02 Nm. Compared to the normal AMB with the planar gap, the designed 3-DoF conical AMB has a wide deflection angle, minor coupling effect, and tiny negative torque. Therefore, the 3-DoF conical AMB causes slight influences on the FW rotor during the suspension and deflection control of gimballing MSFW, and it is more suitable for the gimballing MSFW.

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Section: Introductionmentioning

confidence: 99%

Dynamic performance of three-DoF conical magnetic bearing in Vernier gimballing MSFW

Xiang,

Wang,

Liu

et al. 2024

Nonlinear Dyn

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“…Moreover, AMBs enable the rotor to rotate at extremely high speeds. Therefore, AMBs are wellsuited for high-speed motors, [1][2][3][4][5] turbo machinery, [6][7][8][9][10] high-speed compressors, [11][12][13][14][15] Flywheel Energy Storage Systems, [16][17][18][19][20] and aerospace fields. [21][22][23][24] The dynamics of AMBs are inherently unstable.…”

Section: Introductionmentioning

confidence: 99%

Real-time application of a dynamic disturbance suppression control approach for an axial active magnetic bearing system

Chiu

2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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Active Magnetic Bearings (AMBs) use magnetic forces to suspend the rotor, allowing contactless operation and the ability to adjust stiffness and damping. However, compared to mechanical bearings, magnetic bearings are much weaker in terms of rigidity. A large external force can lead to rotor/stator collision. This study proposes a Dynamic Stiffness Controller (DSC) for AMBs. The DSC dynamically adjusts the AMB stiffness to counter external disturbance forces in real-time. Experimental results show the effective change of AMB stiffness by DSC based on the magnitude of the external load. Furthermore, not only the AMB stiffness can be real-time adjusted to counterbalance disturbances but the steady-state energy consumption is improved as there is little disturbances applied to the system. The AMB-DSC system exhibiting only 33% energy consumption compared to AMBs with constant stiffness. DSC for AMB systems offers benefits like lower risk of rotor-stator collisions, preventing coil burnouts, and improved energy efficiency.

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“…Giap et al., (2020) utilized Mamdani FIS to create a fuzzy sliding mode control (FSMC) to minimise the disturbance effect on AMB system [18]. Other than fuzzy logic‐based control some other control strategies [19–27] are listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Modelling, simulation and performance comparison of different membership functions based fuzzy logic control for an active magnetic bearing system

Gupta

Biswas⃰

Aljafari

et al. 2023

The Journal of Engineering

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In-house prototype model of an active magnetic bearing is built and using its physical parameter values a linearized transfer function of order two, is mathematically obtained for a specific point of operation. In this work, a closed loop active magnetic bearing system is proposed and controller for this closed loop is designed using fuzzy logic control. Two different fuzzy inference systems: Mamdani and Sugeno fuzzy inference system constructed individually with eleven different types of membership functions separately. The considered membership functions are-linear, generalized bell-shaped, Gaussian distribution based, quadratic, cubic polynomial and sigmoidal curve-based membership functions. Calculating the transient state and steady state parameter values together with the controller output allows to see how these various membership functions perform on the proposed closed loop active magnetic bearing system. Observed data shows that changing the fuzzy inference system for a specific membership function will result in 67.41% reduction in the overshoot value, 29.70% reduction in settling time value, 10.42% change in rise time value and 2.91% variation is peak time value. Practicality of all membership functions are analysed based on calculated data and their performances with the proposed model.

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Offset-Free Model Predictive Control for a cone-shaped active magnetic bearing system

Cited by 23 publications

References 22 publications

Dynamic performance of three-DoF conical magnetic bearing in Vernier gimballing MSFW

Dynamic performance of three-DoF conical magnetic bearing in Vernier gimballing MSFW

Real-time application of a dynamic disturbance suppression control approach for an axial active magnetic bearing system

Modelling, simulation and performance comparison of different membership functions based fuzzy logic control for an active magnetic bearing system

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