Large motion tracking control for thrust magnetic bearings with fuzzy logic, sliding mode, and direct linearization

Minihan, Thomas; Lei, Shuliang; Sun, Guoqiang; Palazzolo, Alan; Kascak, Albert F.; Calvert, T.

doi:10.1016/s0022-460x(02)01066-0

Cited by 25 publications

(8 citation statements)

References 9 publications

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“…Some scholars have studied the position tracking performance of the rotor controlled by radial magnetic bearings, and studied proportionalintegral-derivative (PID) control and advanced robust control such as μ-Synthesis. Minihan et al (2003) investigated the position tracking of large axial gaps using a nonlinear control algorithm. In this paper, the classical algorithm, PID control, is applied to designing the magnetic bearing controller, and the position control performance of the magnetic thrust bearing is carried out.…”

Section: Control Performance Of a Magnetic Thrust Bearing Systemmentioning

confidence: 99%

Influence of different operating conditions on centrifugal compressor surge control with active magnetic bearings

Guan

Zhou

Jin

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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The purpose of this paper is to study the surge control effects of centrifugal compressors with active magnetic bearings (AMBs) under several operating conditions. First, the working principle of the magnetic thrust bearing is introduced, and the tracking performance of the rotor under the low frequency is verified by experiments. Then, the Greitzer model of centrifugal compressor is established. The relationship between tip clearance and the performance of compressor is derived, and the proportional-integral-derivative surge controller is designed based on the mass flow feedback. Finally, the surge control platform of the centrifugal compressor with active magnetic bearings is set up, and the surge control experiment of the magnetic bearing system is carried out. The influence of different speeds and different throttle valve openings on surge control performance is analyzed. The experimental results illustrate that speed has little effect on surge control, and the different throttle valve opening sizes have a certain influence on surge. The surge controller designed in this paper has a good control effect on different throttle valve opening sizes. Thus, the magnetic thrust bearing is effective in surge control by adjusting the tip clearance of the compressor.

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Section: Control Performance Of a Magnetic Thrust Bearing Systemmentioning

confidence: 99%

Influence of different operating conditions on centrifugal compressor surge control with active magnetic bearings

Guan

Zhou

Jin

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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“…Marshall et al [12] and Kasarda et al [13] used constant derating factor, calculated with initial readings, in multi-point technique. Minihan et al [14] considered a constant fringe factor in the control of a magnetic thrust bearing. Rao and Tiwari [15,18] implemented multi-objective genetic algorithms (MOGAs) for the optimization of active magnetic thrust bearings (AMTB) with pure electromagnets and hybrid active magnetic thrust bearings (HAMTB) with permanent and electromagnets considering constant loss factors.…”

Section: List Of Symbolsmentioning

confidence: 99%

Experimental analysis on force and correction factor of an active magnetic thrust bearing

Kondaiah

Rao

2018

J Braz. Soc. Mech. Sci. Eng.

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Active magnetic thrust bearing (AMTB) is a device which is used to support an object by controlling the magnetic field. In practice, there is lot of difference between theoretical force and actual force developed between the stator and rotor of an AMTB. This difference is mainly due to fringing, leakage, variation in material properties, misalignments, vibrations, and temperature effects, etc. The difference is also varying with the air gap between stator and rotor and the current supplied. In this work, an experimental approach has been proposed to study the loss factor and efficiency of an Active Magnetic Thrust Bearing. A prototype of AMTB has been made and experimented at different air gaps. Based on the study of single acting actuator, the control performance of a double actuator has been studied. From the study of single acting actuator efficiency and double acting actuator control performance, an optimum air gap has been suggested. Keywords Active magnetic thrust bearings Á Correction factor Á Magnetic levitation Á Control system Á Air gap 1 Introduction An active magnetic bearing works on the principle of electromagnetic suspension. An active magnetic thrust bearing (AMTB) is a non-laminated circular magnetic actuator having

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“…The control action in a sliding mode controller is designed to force the system trajectory to reach the sliding surface (reaching or hitting phase) and to slide along it (sliding phase) or to remain in its vicinity [9][10][11][12]. The outstanding merit of the sliding mode controller is robustness against structured and unstructured uncertainties during the sliding phase [13][14][15]. However, during the reaching phase the system states are pushed toward the switching surfaces.…”

Section: Introductionmentioning

confidence: 99%

Sliding mode fuzzy control of a skid steer mobile robot for path following

Nazari

Naraghi

2008

2008 10th International Conference on Control, Automation, Robotics and Vision

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In this paper, robust sliding mode fuzzy logic control of a four-wheel differentially driven skid steer mobile robot, for path following is considered. This approach combines basic principles of Sliding Mode Control (SMC) with Fuzzy Logic Control (FLC). The path comprises a sequence of discrete waypoints. A novel approach in path extraction interpolates waypoints by means of quadratic curve to generate a continuous reference path. The positional data of waypoints are obtained using a vision system mounted on the mobile robot. Experimental study has been carried out to evaluate the performance of the proposed controller and to compare its performance with a conventional fuzzy logic controller performance. The experimental results show that the proposed controller has achieved superior performance in the presence of model uncertainties and external disturbances with minimum reaching time, minimum distance error, and smooth control actions.

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Large motion tracking control for thrust magnetic bearings with fuzzy logic, sliding mode, and direct linearization

Cited by 25 publications

References 9 publications

Influence of different operating conditions on centrifugal compressor surge control with active magnetic bearings

Influence of different operating conditions on centrifugal compressor surge control with active magnetic bearings

Experimental analysis on force and correction factor of an active magnetic thrust bearing

Sliding mode fuzzy control of a skid steer mobile robot for path following

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