2-DOF Controller Design for Precise Positioning a Spindle Levitated with Active Magnetic Bearings

Arredondo, I.; Jugo, J.

doi:10.3166/ejc.18.194-206

Cited by 12 publications

(4 citation statements)

References 14 publications

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“…Additionally closed-loop feedback control is needed to attenuate imbalance induced vibrations as well as to reject disturbance arising from sensor run-out. The proportional-integral-derivative type controllers and its variants have found applications in many systems supported by magnetic bearings [4,17,18]. The controller used for magnetic bearing supported rotor in the current study is the classical proportional-derivative (PD) type controller.…”

Section: Amb Dynamic Model and Suspension Controlmentioning

confidence: 99%

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Vibration Induced Failure Analysis of a High Speed Rotor Supported by Active Magnetic Bearings

Ahmad

Mohamed²

2015

Transactions of the Canadian Society for Mechanical Engineering

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Active Magnetic Bearings (AMBs) are increasingly used in various industries and a quick re-levitation of AMBs supported high speed flexible rotor is necessary in case of vibration induced failure. A robust fault diagnosis algorithm is presented to detect suspected saturation type of nonlinearity associated with a power amplifier. A five degree-of-freedom AMB system consisting of four opposing pair of radial magnets and a pair of axial magnets is considered. In this paper failure of an industrial grade AMB system is investigated using Sinusoidal Input Describing Function (SIDF) method. SIDF predicts the gain and frequency at which failure occurs. It is demonstrated that the predicted frequency is in agreement with the frequency at which failure occurs.

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Section: Amb Dynamic Model and Suspension Controlmentioning

confidence: 99%

“…where K a is the power amplifier gain. Substituting (18) in (16) and also considering the unbalance force term yields…”

Section: Amb Dynamic Model and Suspension Controlmentioning

confidence: 99%

Vibration Induced Failure Analysis of a High Speed Rotor Supported by Active Magnetic Bearings

Ahmad

Mohamed²

2015

Transactions of the Canadian Society for Mechanical Engineering

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“…There are many research fruits in the field of unmolded dynamics and actuator faults and unknown output of the control system [9]- [11], iterative feedback tuning [12], [13]. Furthermore, besides conventional PID controller, 2-degree of freedom (DOF) controller, nonlinear smooth feedback control method and linear parameter varying controller were studied for AMB [14]- [16]. But these feedback control methods were designed for the stability of the system, not for periodic vibrations produced by rotor imbalance.…”

Section: Introductionmentioning

confidence: 99%

A Model-Free Control Method for Synchronous Vibration of Active Magnetic Bearing Rotor System

Zheng

Zhou

et al. 2019

IEEE Access

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The unbalanced force on the active magnetic bearing (AMB) rotor system is the main reason of system vibrations, which always have periodic repetitive characteristics. However, the closed-loop feedback control system (CFCS) is difficult to achieve effective control of these repetitive problems. In this paper, we firstly analyzed the synchronous vibration by taking AMB rotor mass imbalance as an example. Then, we proposed a model-free control (MFC) method based on the Newton-type ILC algorithm, and the key of this MFC is to use a partial derivative (P-D) of the output with respect to the input. The simplicity of this algorithm lies in that and the P-D is calculated by only using the input and output (I/O) data of the system and then used to adjust the ILC gain. Subsequently, we proposed a parallel plug-in control scheme based on existing AMB control system to suppress synchronous vibration. Finally, we carried out the simulation and experiment to research the control method mentioned in this paper. The results show that the MFC has a good control effect on AMB synchronous vibration. Notably, this MFC for synchronous vibration has the advantages of being without system model, simple design and good portability, and can provide theoretical and experimental basis for the application of AMB in high precision and high speed fields.INDEX TERMS Active magnetic bearing, synchronous vibration, model-free, iterative learning control parallel control scheme.

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“…In the overwhelming majority of cases, however, the overall control performance could not be satisfied, as the MB system is a non-linear plant with the unmeasured timevarying parameters as well as the unavoidable disturbances. In recent years, the decoupling control methods have been widely used for MB systems and other magnetic levitation drive systems (Arredondo and Jugo, 2012;Park and Lee, 2010). On the whole, the decoupling control schemes can be divided into intelligent decoupling approaches (Gao et al, 2014;Leu et al, 2014;Li et al, 2013;Mahmoodabadi et al, 2014) and linearization and decoupling methods (Grabner et al, 2010;Hung et al, 2003;Lindlau and Knospe, 2002;Min and Knospe, 2005).…”

Section: Introductionmentioning

confidence: 99%

Radial position control of a magnetically suspended rotor system in a direct-driven spindle using inverse system scheme

Sun

Xue

Chen

et al. 2016

Transactions of the Institute of Measurement and Control

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Direct-driven spindles have no mechanical transmission trains and gears, and are the key actuators for computerized numerical control machine tools. These magnetically suspended rotor systems are required to provide fast response and high precision. However, these systems are non-linear and strongly coupled. The traditional proportional, integral, derivative (PID) control method has been widely used for such systems owing to its relative simple realization. However, the tracking, disturbance rejection and robustness properties of the controlled plant may not be satisfied. To solve these problems, this paper presents a decoupling control strategy based on an inverse system scheme and combines it with the internal model control method to guarantee system robustness to the parameter uncertainty and external disturbance. By introducing an inversion of the magnetically suspended rotor system into the original system, a new pseudolinear system is developed. It can be shown that this addition effectively eliminates the influence of the unmodelled dynamics, and improve the accuracy and robustness of the whole system. The simulation and experimental results show that when compared with the traditional control scheme, the proposed control scheme provides good decoupling and robustness performance for the magnetically suspended rotor system in different operating conditions.

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2-DOF Controller Design for Precise Positioning a Spindle Levitated with Active Magnetic Bearings

Cited by 12 publications

References 14 publications

Vibration Induced Failure Analysis of a High Speed Rotor Supported by Active Magnetic Bearings

Vibration Induced Failure Analysis of a High Speed Rotor Supported by Active Magnetic Bearings

A Model-Free Control Method for Synchronous Vibration of Active Magnetic Bearing Rotor System

Radial position control of a magnetically suspended rotor system in a direct-driven spindle using inverse system scheme

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