Measurement System of a Magnetic Suspension System for a Jet Engine Rotor

Kurnyta-Mazurek, Paulina; Kurnyta, Artur; Henzel, Maciej

doi:10.3390/s20030862

Cited by 8 publications

(5 citation statements)

References 18 publications

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“…As mentioned above, predictive algorithms are based on several control methods. In this paper, a methodology of determining the MAC algorithm was presented as an example of non-parametric predictive controller synthesis [26]. This algorithm adopts the control system model in the following form:…”

Section: Predictive Control Methods and Theoretical Resultsmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Kurnyta-Mazurek,

Szolc,

Henzel

et al. 2021

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This paper deals with research on the magnetic bearing control systems for a high-speed rotating machine. Theoretical and experimental characteristics of the control systems with the model algorithmic control (MAC) algorithm and the proportional-derivative (PD) algorithm are presented. The MAC algorithm is the non-parametric predictive control method that uses an impulse response model. A laboratory model of the rotor-bearing unit under study consists of two active radial magnetic bearings and one active axial (thrust) magnetic bearing. The control system of the rotor position in air gaps consists of the fast prototyping control unit with a signal processor, the input and output modules, power amplifiers, contactless eddy current sensors and the host PC with dedicated software. Rotor displacement and control current signals were registered during investigations using a data acquisition (DAQ) system. In addition, measurements were performed for various rotor speeds, control algorithms and disturbance signals generated by the control system. Finally, the obtained time histories were presented, analyzed and discussed in this paper.

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Section: Predictive Control Methods and Theoretical Resultsmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Kurnyta-Mazurek,

Szolc,

Henzel

et al. 2021

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show abstract

“…The magnetic support system of a high-speed machine rotor usually consists of an electromechanical actuator, a control unit, amplifiers and sensors [ 15 , 16 , 17 , 18 , 19 , 20 ]. The electromechanical actuator is intended to support a high-speed rotor and generate electromagnetic force, providing its stable operation.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, displacement sensors are more expensive and introduce some design limitations, but their configuration and assembly are simpler than in the case of induction sensors. For this reason, displacement sensors are typically used in AMB systems [ 15 , 16 , 19 , 20 , 21 , 22 ]. In typical AMB levitated high-speed machine applications, the displacement of the rotor in the mechanical air gap is measured with commercially available eddy-current-based displacement sensors [ 16 , 17 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, displacement sensors are typically used in AMB systems [ 15 , 16 , 19 , 20 , 21 , 22 ]. In typical AMB levitated high-speed machine applications, the displacement of the rotor in the mechanical air gap is measured with commercially available eddy-current-based displacement sensors [ 16 , 17 , 19 , 20 , 21 , 22 ]. In recent years, these sensors have gained increasing scientific attention [ 23 , 24 , 25 , 26 , 27 , 28 ] due their wide range of applications in health [ 29 ], aerospace [ 30 ] and automotive [ 31 ] fields.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Magnetic Field of AMB on Eddy-Current Sensor Operation

Kurnyta-Mazurek

Kurnyta

2023

Sensors

Self Cite

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This paper presents laboratory results on the influence of the magnetic field of an active magnetic bearing (AMB) on the eddy-current sensor operation. The magnetic suspension technology enables continuous diagnostics and monitoring of a rotary machine and eliminates drawbacks of classical bearing properties. The magnetic bearing system usually consists of two radial and one axial magnetic bearing. It is combined with a control unit, amplifiers and sensors for measuring the instantaneous position of the shaft. For this purpose, eddy-current sensors are frequently used. They operate in close proximity to the electromechanical actuators; therefore, the question arises whether the actuators do not interfere with the correct operation of these sensors. In the paper, the test rig and research plan prepared for that investigation are delivered. Measurement signals were registered from four control channels for different configurations of power supplies for system elements, e.g., with sensors and AMBs turned off, with sensors turn on and at normal work. Recorded time courses are presented and discussed in the paper. For the prepared test rig and AMB/eddy-current sensor configuration, no significant influence of the generated magnetic field from the support is found for the eddy-current sensor output.

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“…The multi degree of freedom electromagnetic actuators can produce driving force in multiple directions, which are the critical components of the modular magnetic suspension platform [20,21]. According to different driving forces, the magnetically levitated actuators can be divided into the resistance magnetic actuators [22][23][24] and the Lorentz force actuators. Compared with the resistance magnetic actuators, due to the better linearity between the electromagnetic force and the control current, the Lorentz force actuators have many advantages such as no iron loss, high control precision, high bandwidth and so on [25,26].…”

Section: Introductionmentioning

confidence: 99%

A Novel 2-DOF Lorentz Force Actuator for the Modular Magnetic Suspension Platform

Yang

Zhao

et al. 2020

Sensors

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The modular magnetic suspension platform depends on multi degree of freedom of Lorentz force actuators for large bearing capacity, high precision positioning and structure miniaturization. To achieve the integration of vertical driving force and horizontal driving force, a novel 2- (two degrees-of-freedom) DOF Lorentz force actuator is developed by designing the pose of the windings and permanent magnets (PMs). The structure and the working principle are introduced. The electromagnetic force mathematical model is established by the equivalent magnetic circuit method to analyze the coupling of magnetic flux. The distribution characteristics of magnetic flux density are analyzed by the finite-element method (FEM). It is found that the coupling of the magnetic flux and the large magnetic field gradient severely reduce the uniformity of the air-gap magnetic field. The electromagnetic force characteristic is investigated by FEM and measurement experiments. The difference between FEM and experiment results is within 10%. The reasons of driving force fluctuation are explained based on the distribution of air-gap magnetic field. The actuator performance are compared under the sliding mode control algorithm and PID control algorithm and the positioning accuracy is 20 μm and 15 μm respectively. Compared with the similar configuration, the motion range and force coefficient of the Lorentz force actuator in this paper are larger. It has a certain guiding significance on the structure design of the multi degree of freed Lorentz force actuator.

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Measurement System of a Magnetic Suspension System for a Jet Engine Rotor

Cited by 8 publications

References 18 publications

Bulletin of the Polish Academy of Sciences: Technical Sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

The Influence of Magnetic Field of AMB on Eddy-Current Sensor Operation

A Novel 2-DOF Lorentz Force Actuator for the Modular Magnetic Suspension Platform

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