Modeling and control of a flexible rotor system with AMB-based sustentation

Arredondo, I.; Jugo, J.; Etxebarria, V.

doi:10.1016/j.isatra.2007.04.004

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…In general, the latter one is more stable [32,33]. The model of the flexible rotor was obtained by dividing its length into n segments for the lateral rotor dynamic analysis, as shown in Fig.…”

Section: Rotor Dynamic Modeling and Analysismentioning

confidence: 99%

“…Thus, to stabilize the rotor position, a closed-loop control with an adequate phase lead has to be applied. In many cases, particularly in industrial practice, PID regulators are implemented for this purpose [12][13][14]. However, using a PID controller without additional compensation would lead to power amplifier voltage saturation and insufficient damping for the flexible rotor when passing the bending critical speed.…”

Section: Introductionmentioning

confidence: 99%

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Active Vibration Control of the Flexible Rotor to Pass the First Bending Critical Speed in High Energy Density Magnetically Suspended Motor

Tang

Fang

Zheng

et al. 2015

Journal of Engineering for Gas Turbines and Power

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In order to minimizing the rotor displacement and the amplifier current mainly caused by the unbalance forces when the flexible rotor passes the first bending critical speed, the optimal controller is presented in this paper. The accurate modeling method for the flexible rotor based on the sine sweeping measurements is investigated. The design of the Kalman estimator and the choice of the variance matrix elements have been described. The optimal state feedback regulator with an integral controller has been used for stabilizing the system and the determination of the weight matrices has been investigated in detail. The influences of the specific elements of the weight matrices on the resonance peak of the flexible rotor when passing the first bending critical speed are analyzed. Finally, the running up test of the flexible rotor is implemented and the result shows the effectiveness of linear quadratic Gaussian (LQG) controller minimizing the rotor displacement and the amplifier current nearby the first bending critical speed. Furthermore, the comparison between the proportional-integral-differential (PID) controller with phase lead compensator and the LQG controller verifies the superiority of LQG controller in reducing the amplifier currents.

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Section: Rotor Dynamic Modeling and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active Vibration Control of the Flexible Rotor to Pass the First Bending Critical Speed in High Energy Density Magnetically Suspended Motor

Tang

Fang

Zheng

et al. 2015

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

show abstract

“…Though they are theoretically equivalent, the latter one is usually more stable [36,37]. The model of the flexible rotor can be obtained by dividing its length into n segments for the lateral rotor dynamic analysis, as shown in Fig.…”

Section: Modeling Of Flexible Rotormentioning

confidence: 99%

“…Due to these advantages, AMB has been applied successfully in some areas such as flywheels [2][3][4] control moment gyros [5,6], turbo molecular pumps [7,8], and high-speed motors [9][10][11]. In industrial applications, rigid rotors are widely used in low power motors.…”

Section: Introductionmentioning

confidence: 99%

Active Vibration Control of the Flexible Rotor in High Energy Density Magnetically Suspended Motor With Mode Separation Method

Tang

Fang

Han

2015

Journal of Engineering for Gas Turbines and Power

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Since the mass of the rotor in high energy density magnetically suspended motor (HEDMSM) is always large and there are only three balancing planes on the flexible rotor restricted by the structure of the motor, which means that the second bending mode cannot be balanced using N þ 1 planes method which is always applied to balance the flexible rotor. Then, the rotor displacements maybe large and this situation will make the system consume large amplifier currents when the rotor passes the first bending critical speed. Therefore, the mode separation method is proposed to separate the first and the second bending modes in rotor displacement and reconstruct the displacement signal nearby the first bending mode. Then, the original rotor displacement signal used by the digital controller is substituted by the reconstructed displacement signal and the amplifier current is reduced a lot when the rotor passes the first bending critical speed. Finally, the experiment of mode separation is carried out in 100 kW magnetically suspended motor and the experiment results show the effectiveness and superiority of the mode separation method in reducing the amplifier current when the rotor passes the first bending critical speed.

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“…Since magnetic levitation does not use long reaching and joint parts, wear and maintenance problem caused by friction are completely eliminated. Magnetic levitation has been used in magnetic bearings [1][2][3][4][5], vibration suspension [6][7][8][9] and position tracking [10]. Furthermore, different types of control techniques have been used in magnetic levitation systems.…”

Section: Introductionmentioning

confidence: 99%

Dual LQG-PID control of a highly nonlinear magnetic levitation system

El-Sinawi

Emam

2011

2011 Fourth International Conference on Modeling, Simulation and Applied Optimization

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A study of one-dimensional position control of a light iron ball levitated by one electromagnet is proposed in this work. The vertical position of the ball is the target of the proposed control strategy. It is assumed that the position measurement of the ball is inaccessible and thus, estimates of the position are utilized as the feedback signal to the controller. Control of the ball's position is carried out using LQG-based controller with the objective of manipulating the electromagnet current to drive the ball to steady state with minimal error. The integrity of the controller as well as accuracy of the system's model is evaluated via simulation.

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Modeling and control of a flexible rotor system with AMB-based sustentation

Cited by 15 publications

References 12 publications

Active Vibration Control of the Flexible Rotor to Pass the First Bending Critical Speed in High Energy Density Magnetically Suspended Motor

Active Vibration Control of the Flexible Rotor to Pass the First Bending Critical Speed in High Energy Density Magnetically Suspended Motor

Active Vibration Control of the Flexible Rotor in High Energy Density Magnetically Suspended Motor With Mode Separation Method

Dual LQG-PID control of a highly nonlinear magnetic levitation system

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