Relevant bibliographies by topics / Active magnetic bearing system

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Active magnetic bearing system'

Author: Grafiati
Published: 10 January 2023
Last updated: 28 January 2023

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Journal articles on the topic "Active magnetic bearing system"

1

Owusu-Ansah, Prince, Yefa Hu, and Rhoda Afriyie Mensah. "Active Magnetic Bearing as a Force Measurement System." International Journal of Materials, Mechanics and Manufacturing 5, no. 3 (August 2017): 209–12. http://dx.doi.org/10.18178/ijmmm.2017.5.3.320.

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Ma, Zhihao, Gai Liu, Yichen Liu, Zhaocheng Yang, and Huangqiu Zhu. "Research of a Six-Pole Active Magnetic Bearing System Based on a Fuzzy Active Controller." Electronics 11, no. 11 (May 29, 2022): 1723. http://dx.doi.org/10.3390/electronics11111723.

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Magnetic bearings have a series of excellent qualities, such as no friction and abrasions, high speed, high accuracy, and so on, which have fundamentally innovated traditional forms of support. In order to solve the problems of the large volume, low power density and high coupling coefficient of three-pole magnetic bearings, a six-pole AC active magnetic bearing is designed. Firstly, the basic structure and working principle of a two-degree-of-freedom (2-DOF) six-pole active magnetic bearing is introduced. Secondly, a suspension force modeling method of a 2-DOF AC active magnetic bearing based on the Maxwell tensor method is proposed, and the mathematical model of active magnetic bearing is established. Considering the fact that AC active magnetic bearing is essentially a nonlinear system, a fuzzy active disturbance rejection control (ADRC) method is designed based on fuzzy control and ADRC theory. Its control algorithm and control block diagram are given, and the fuzzy ADRC method is simulated and verified. Finally, the control block diagram of an experimental system based on the 2-DOF six-pole active magnetic bearing is given, and the experimental platform is constructed. The experimental results show that the mechanical and magnetic circuit structure of the 2-DOF six-pole active magnetic bearing is reasonable, and the fuzzy controllers can realize the stable suspension of the rotor.
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Kertész, Milan, Radko Kozakovič, Luboš Magdolen, and Michal Masaryk. "Active Displacement Control of Active Magnetic Bearing System." Scientific Proceedings Faculty of Mechanical Engineering 22, no. 1 (December 1, 2014): 32–37. http://dx.doi.org/10.2478/stu-2014-0006.

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AbstractThe worldwide energy production nowadays is over 3400 GW while storage systems have a capacity of only 90 GW [1]. There is a good solution for additional storage capacity in flywheel energy storage systems (FES). The main advantage of FES is its relatively high efficiency especially with using the active magnetic bearing system. Therefore there exist good reasons for appropriate simulations and for creating a suitable magneto-structural control system. The magnetic bearing, including actuation, is simulated in the ANSYS parametric design language (APDL). APDL is used to create the loops of transient simulations where boundary conditions (BC) are updated based upon a “gap sensor” which controls the nodal position values of the centroid of the shaft and the current density inputs onto the copper windings.
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Zong, Ming, Xiao Kang Wang, and Yang Cao. "Permanent Magnet Biased Bearing of Suspension System." Advanced Materials Research 383-390 (November 2011): 5529–35. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5529.

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PM (Permanent Magnet) biased magnetic bearing with PM to replace the magnetic field produced by electromagnet an Active Magnetic Bearing generated static bias magnetic field, it can reduce the power consumption of power amplifier to reduce the number of turns of magnet safety, reduce the volume of magnetic bearings, reducing electromagnetic coil operating current, thereby reducing the power amplifier power control system and heat sink size, magnetic bearings significantly reduce power loss, and fundamentally reduce the cost of bearing. In this paper, a kind of PM biased magnetic bearings, describes its structure and working principle, derived a mathematical model of magnetic bearing and magnetic circuit of PM biased magnetic bearings are calculated, given the specific PM biased magnetic bearing size and accordingly calculate the parameters of magnetic bearings. A magnetic model constructed using Simulink simulation method, and constructed using this method, magnetic bearing specific mathematical model simulation results show that the rotor position in the balance, X and Y decoupling between the control winding, while the deviation from equilibrium position time, X and Y control coupling between the windings, the simulation results and the calculation results.
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Cheng, Baixin, Xin Cheng, Shao Song, Huachun Wu, Yefa Hu, Rougang Zhou, and Shuai Deng. "Active Disturbance Rejection Control in Magnetic Bearing Rotor Systems with Redundant Structures." Sensors 22, no. 8 (April 14, 2022): 3012. http://dx.doi.org/10.3390/s22083012.

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At present, magnetic bearings are a better energy-saving choice than mechanical bearings in industrial applications. However, there are strongly coupled characteristics in magnetic bearing–rotor systems with redundant structures, and uncertain disturbances in the electrical system as well as external disturbances, and these unfavorable factors degrade the performance of the system. To improve the anti-interference performance of magnetic bearing systems, this paper proposes the inverse of the current distribution matrix W−1 meaning that the active disturbance rejection control simulation model can be carried out without neglecting the current of each coil. Firstly, based on the working mechanism of magnetic bearings with redundant structures and the nonlinear electromagnetic force model, the current and displacement stiffness models of magnetic bearings are established, and a dynamic model of the rotor is constructed. Then, according to the dynamic model of the rotor and the mapping relationship between the current of each coil and the electromagnetic force of the magnetic bearing, we established the equivalent control loop of the magnetic bearing–rotor system with redundant structures. Finally, on the basis of the active disturbance rejection control (ADRC) strategy, we designed a linear active disturbance rejection controller (LADRC) for magnetic bearings with redundant structures under the condition of no coil failure, and a corresponding simulation was carried out. The results demonstrate that compared to PID+current distribution control strategy, the LADRC+current distribution control strategy proposed in this paper is able to effectively improve the anti-interference performance of the rotors supported by magnetic bearings with redundant structures.
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Xie, Zhen Yu, Hong Kai Zhou, and Xiao Wang. "Effects of the Magnetic Damper Locations on Dynamic Characteristics of the Active Magnetic Bearing System in Manufacturing Engineering." Applied Mechanics and Materials 252 (December 2012): 51–55. http://dx.doi.org/10.4028/www.scientific.net/amm.252.51.

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The magnetic damper was introduced into the high speed rotating machinery to restrain the vibration of the rotor supported by active magnetic bearings. The experimental setup, which was made up of one rotor, two radial active magnetic bearings, one axial active magnetic bearing, one magnetic damper and control system, was built to investigate the effects of the magnetic damper locations on dynamic characteristics of the system by theoretical analysis, experimental modal analysis and actual operation of the system. The results show that the vibration of the active magnetic bearing system operating at the modal frequency can be reduced more effectively if the magnetic damper is located far from the nodes of the corresponding mode shape.
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Cho, Young Man, Sriram Srinavasan, Jae-Hyuk Oh, and Hwa Soo Kim. "Modelling and system identification of active magnetic bearing systems." Mathematical and Computer Modelling of Dynamical Systems 13, no. 2 (April 2007): 125–42. http://dx.doi.org/10.1080/13873950600605250.

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Kurnyta-Mazurek, Paulina, Artur Kurnyta, and Maciej Henzel. "Measurement System of a Magnetic Suspension System for a Jet Engine Rotor." Sensors 20, no. 3 (February 6, 2020): 862. http://dx.doi.org/10.3390/s20030862.

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This paper presents laboratory results on the measurement system of a magnetic suspension bearing system for a jet engine rotor of an unmanned aerial vehicle (UAV). Magnetic suspension technology enables continuous diagnostics of a rotary machine and eliminates of the negative properties of classical bearings. This rotor-bearing system consists of two radial magnetic bearings and one axial (thrust) magnetic bearing. The concept of the bearing system with a magnetically suspended rotor for UAV is presented in this paper. Rotor geometric and inertial characteristics were assumed according to the parameters of a TS-21 jet engine. Preliminary studies of the measurement system of rotor engines were made on a laboratory stand with homopolar active magnetic bearings. The measurement system consisted of strain gauges, accelerometers, and contactless proximity sensors. During the research, strains were registered with the use of a wireless data acquisition (DAQ) system. Measurements were performed for different operational parameters of rotational rotor speed, control system parameters, and with the presence of disturbance signals from the control system. In this paper, obtained operational characteristics are presented and discussed.
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Lee, Chong-Won, Young-Ho Ha, Chee-Young Joh, and Cheol-Soon Kim. "In-Situ Identification of Active Magnetic Bearing System Using Directional Frequency Response Functions." Journal of Dynamic Systems, Measurement, and Control 118, no. 3 (September 1, 1996): 586–92. http://dx.doi.org/10.1115/1.2801184.

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Complex modal testing is employed to obtain the directional frequency responses of a four-axis active magnetic bearing system. In the test, magnetic bearings are used as exciters while the system is in operation. The directional frequency response estimates are then used to effectively identify the parameters of the active magnetic bearing system. Experimental results show that the directional frequency response function, which is properly defined in the complex domain, is a powerful tool for identification of bearing as well as modal parameters of the system.
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GAHLER, Conrad, Manuel MOHLER, and Raoul HERZOG. "Magnetic Bearing. Multivariable Identification of Active Magnetic Bearing Systems." JSME International Journal Series C 40, no. 4 (1997): 584–92. http://dx.doi.org/10.1299/jsmec.40.584.

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Dissertations / Theses on the topic "Active magnetic bearing system"

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Khader, Shahbaz Abdul. "System Identification of Active Magnetic Bearing for Commissioning." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-243630.

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Active magnetic bearing (AMB) is an ideal bearing solution for high performance and energy efficient applications. Proper operation of AMB can be achieved only with advanced feedback control techniques. An identified system model is required for synthesizing high performance model based controllers. System identification is the preferred method for obtaining an accurate model. Therefore, it becomes a prerequisite for the commissioning of AMB. System identification for commissioning poses some challenges and special requirements. In this thesis, system identification of AMB is approached within the context of commissioning. A procedure for identification is developed and applied to experimental data from a prototype AMB system. The identification procedure is based on the so called prediction error method, and it has been performed in the frequency domain. A linear state-space model, along with the required parameters, is successfully identified.
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Li, Peichao. "Active touchdown bearing control in magnetic bearing systems." Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678846.

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Zhou, F. B. "Transputer-based digital control of an active magnetic bearing system." Thesis, University of Salford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360386.

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Clements, Joshua Ryan. "The Experimental Testing of an Active Magnetic Bearing/Rotor System Undergoing Base Excitation." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/35827.

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Active Magnetic Bearings (AMB) are a relatively recent innovation in bearing technology. Unlike conventional bearings, which rely on mechanical forces originating from fluid films or physical contact to support bearing loads, AMB systems utilize magnetic fields to levitate and support a shaft in an air-gap within the bearing stator. This design has many benefits over conventional bearings. The potential capabilities that AMB systems offer are allowing this new technology to be considered for use in state-of-the-art applications. For example, AMB systems are being considered for use in jet engines, submarine propulsion systems, energy storage flywheels, hybrid electric vehicles and a multitude of high performance space applications. Many of the benefits that AMB systems have over conventional bearings makes them ideal for use in these types of vehicular applications. However, these applications present a greater challenge to the AMB system designer because the AMB-rotor system may be subjected to external vibrations originating from the vehicle's motion and operation. Therefore these AMB systems must be designed to handle the aggregate vibration of both the internal rotor dynamic vibrations and the external vibrations that these applications will produce. This paper will focus on the effects of direct base excitation to an AMB/rotor system because base excitation is highly possible to occur in vehicular applications. This type of excitation has been known to de-stabilize AMB/rotor systems therefore this aspect of AMB system operation needs to be examined. The goal of this research was to design, build and test a test rig that has the ability to excite an AMB system with large amplitude base excitation. Results obtained from this test rig will be compared to predictions obtained from linear models commonly used for AMB analysis and determine the limits of these models.
Master of Science
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Perea, Fabián Carlos Antonio. "Physical parameters identification for a prototype of active magnetic bearing system." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8623.

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In this thesis the algorithms and strategies for active magnetic bearing should be analysed, implemented and simulated in Matlab as well as experimentally tested in the real-time computation system for a prototype of active magnetic bearing. Develop a general method and algorithm identi cation for active magnetic bearings prototype and get real system parameters that allow generate the equation of state of the system to control its further development. The specific objectives in this Thesis are: Develop a data acquisition system for the AMBs. Analyse the mathematical model of the system from the real system. Conduct experiments of a physical model for data collection. Develop an identification algorithm for the parameters of the real AMBs. Validate system developed by testing the prototype.
Tesis
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Aragón, Ayala Danielo Eduardo. "Optimal control for a prototype of an active magnetic bearing system." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8675.

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First applications of the electromagnetic suspension principle have been in experimental physics, and suggestions to use this principle for suspending transportation vehicles for high-speed trains go back to 1937. There are various ways of designing magnetic suspensions for a contact free support, the magnetic bearing is just one of them [BCK+09]. Most bearings are used in applications involving rotation. Nowadays, the use of contact bearings solves problems in the consumer products, industrial machinery, or transportation equipment (cars, trucks, bicycles, etc). Bearings allow the transmition of power from a motor to moving parts of a rotating machine [M+92]. For a variety of rotating machines, it would be advantageous to replace the mechanical bearings for magnetic bearings, which rely on magnetic elds to perform the same functions of levitation, centering, and thrust control of the rotating parts as those performed by a mechanical bearing. An advantage of the magnetic bearings (controlled or not) against purely mechanical is that magnetic bearings are contactless [BHP12]. As a consequence these properties allow novel constructions, high speeds with the possibility of active vibration control, operation with no mechanical wear, less maintenance and therefore lower costs. On the other hand, the complexity of the active (controlled) and passive (not controlled) magnetic bearings requires more knowledge from mechanics, electronics and control [LJKA06]. The passive magnetic bearing (PMB) presents low power loss because of the absence of current, lack of active control ability and low damping sti ness [FM01, SH08]. On the other hand, active magnetic bearing (AMB) has better control ability and high sti ness, whereas it su ers from high power loss due to the biased current [JJYX09]. Scientists of the 1930s began investigating active systems using electromagnets for high-speed ultracentrifuges. However, not controlled magnetic bearings are physically unstable and controlled systems only provide proper sti ness and damping through sophisticated controllers and algorithms. This is precisely why, until the last decade, magnetic bearings did not become a practical alternative to rolling element bearings. Today, magnetic bearing technology has become viable because of advances in microprocessing controllers that allow for con dent and robust active control [CJM04]. Magnetic bearings operate contactlessly and are therefore free of lubricant and wear. They are largely immune to heat, cold and aggressive substances and are operational in vacuum. Because of their low energy losses they are suited for applications with high rotation speeds. The forces act through an air gap, which allows magnetic suspension through hermetic encapsulations [Bet00].
Tesis
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Gouws, Rupert. "Condition monitoring of active magnetic bearing systems / R. Gouws." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1305.

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Vogel, Deon Edward. "Embedded controller for a fully suspended active magnetic bearing system / D.E. Vogel." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1121.

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The industrial application of active magnetic bearings is expanding. This expansion is a driving force in the integration of AMBs. The Magnetic Bearing Modelling and Control (MBMC) research group in the School of Electrical, Electronic and Computer Engineering, North-West University is accordingly compelled to expand their research to the application of embedded control systems. The aim of this study is to develop an embedded controller for an active magnetic bearing in order to establish a DSP platform for future research in embedded control systems. The embedded controller developed during this study is required to be capable of actively controlling a spindle with a rotational speed of 60 000 rpm. It is further required that the embedded controller is capable of stand-alone operation, scalable in terms of the number of axes controlled and flexible in terms of the control algorithm implementation. A TMS320F2812 DSP is selected for its processing speed, on-chip peripherals and available development tools such as the eZdsp® TMS320F2812 DSP Starter Kit, VisSim® Embedded Controls Developer and Code Composer Studio®. The interface of the embedded controller is designed for an existing double radial AMB model, which allows for the performance of the embedded controller to be compared to the existing PC-based controller. The AMB system exhibits a slightly higher second order equivalent stiffness and damping when using the embedded controller as opposed to the existing PC-based controller. The AMB system is also slightly less sensitive when using the embedded controller. This embedded controller establishes a DSP platform which can be used for further research into embedded control systems and advanced control algorithms. The knowledge gained and controller developed for this study serves as essential stepping stones towards the ultimate goal of AMB integration through the progression from a DSP to an FPGA and eventually an ASIC.
Thesis (M. Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2006.
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Combrinck, Angelique. "Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4457.

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The School of Electrical, Electronic and Computer Engineering at the North-West University in Potchefstroom has established an active magnetic bearing (AMB) research group called McTronX. This group provides extensive knowledge and experience in the theory and application of AMBs. By making use of the expertise contained within McTronX and the rest of the control engineering community, an adaptive controller for an AMB flywheel system is implemented. The adaptive controller is faced with many challenges because AMB systems are multivariable, nonlinear, dynamic and inherently unstable systems. It is no wonder that existing AMB models are poor approximations of reality. This modelling problem is avoided because the adaptive controller is based on an indirect adaptive control law. Online system identification is performed by a neural network to obtain a better model of the AMB flywheel system. More specifically, a nonlinear autoregressive with exogenous inputs (NARX) neural network is implemented as an online observer. Changes in the AMB flywheel system’s environment also add uncertainty to the control problem. The adaptive controller adjusts to these changes as opposed to a robust controller which operates despite the changes. Making use of reinforcement learning because no online training data can be obtained, an adaptive critic model is applied. The adaptive controller consists of three neural networks: a critic, an actor and an observer. It is called an observer-based adaptive critic neural controller (ACNC). Genetic algorithms are used as global optimization tools to obtain values for the parameters of the observer, critic and actor. These parameters include the number of neurons and the learning rate for each neural network. Since the observer uses a different error signal than the actor and critic, its parameters are optimized separately. When the actor and critic parameters are optimized by minimizing the tracking error, the observer parameters are kept constant. The chosen adaptive control design boasts analytical proofs of stability using Lyapunov stability analysis methods. These proofs clearly confirm that the design ensures stable simultaneous identification and tracking of the AMB flywheel system. Performance verification is achieved by step response, robustness and stability analysis. The final adaptive control system remains stable in the presence of severe cross-coupling effects whereas the original decentralized PD control system destabilizes. This study provides the justification for further research into adaptive control using artificial intelligence techniques as applied to the AMB flywheel system.
Thesis (M.Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2011.
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Van, Rensburg Jacques Jansen. "An integrated controller for an active magnetic bearing system / by Jacques Jansen van Rensburg." Thesis, North-West University, 2007. http://hdl.handle.net/10394/2306.

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Books on the topic "Active magnetic bearing system"

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Eliseo, DiRusso, Provenza A. J, and United States. National Aeronautics and Space Administration., eds. An active homopolar magnetic bearing with high temperature superconductor coils and ferromagnetic cores. [Washington, D.C.]: National Aeronautics and Space Administration, 1995.

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Eliseo, DiRusso, Provenza A. J, and United States. National Aeronautics and Space Administration., eds. An active homopolar magnetic bearing with high temperature superconductor coils and ferromagnetic cores. [Washington, D.C.]: National Aeronautics and Space Administration, 1995.

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National Aeronautics and Space Administration (NASA) Staff. Estimator Based Controller for High Speed Flywheel Magnetic Bearing System. Independently Published, 2018.

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V, Brown Gerald, Jansen Ralph H, and NASA Glenn Research Center, eds. Estimator based controller for high speed flywheel magnetic bearing system. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Eliseo, DiRusso, Provenza A. J, and United States. National Aeronautics and Space Administration., eds. An active magnetic bearing with high T[subscript c] superconducting coils and ferromagnetic cores. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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NPSAT1 Magnetic Attitude Control System Algorithm Verification, Validation, and Air-Bearing Tests. Storming Media, 2004.

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T, Flowers George, Trent Victor S, and United States. National Aeronautics and Space Administration., eds. Dynamic modelling and response characteristics of a magnetic bearing rotor system including auxiliary bearings. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Magnetic Refrigeration at Room Temperature : design, construction and evaluation of a reciprocating demonstrator and a rotary prototype : Numerical modelling and analysis of an active magnetic regenerator system. Prensas de la Universidad de Zaragoza, 2019.

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Runhaar, Jos, and Sita M. A. Bierma-Zeinstra. Lifestyle. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199668847.003.0012.

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Modern lifestyles put a great burden on the human musculoskeletal system. Since 1980, the worldwide prevalence of obesity has tripled in many European countries. Obesity is known to affect both weight-bearing and non-weight-bearing joints due to a combination of mechanical overload and systemic inflammation. On the other hand, both to combat the obesity pandemic and to increase or maintain the quality of life, physical activity and sports are encouraged next to a healthy diet. Although both have a positive influence on cardiovascular risk factors, physical activity and especially sporting activities do lead to increased loading of the active joints and increased risk for joint injuries, which might lead to osteoarthritis development. This chapter provides an overview of the current knowledge on lifestyle risk factors for the development and progression of osteoarthritis as published in recent systematic reviews, complemented with several narrative reviews.
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Book chapters on the topic "Active magnetic bearing system"

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Hisatani, Masujiro. "Identification and Optimization of Active Magnetic Bearing Systems Using Measured Nyquist Diagrams." In Magnetic Bearings, 273–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-51724-2_25.

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Gähler, C., M. Mohler, and R. Herzog. "Multivariable Identification of Active Magnetic Bearing Systems." In Solid Mechanics and Its Applications, 127–34. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5778-0_16.

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Zhang, Xiaoshen, Zhe Sun, Wolfgang Seemann, Lei Zhao, Zhao Jingjing, and Zhengang Shi. "Analysis of Nonlinear Behaviors in Active Magnetic Bearing-Rotor System." In NODYCON Conference Proceedings Series, 649–59. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81162-4_56.

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Huynh, Van Van, and Bach Dinh Hoang. "Second Order Sliding Mode Control Design for Active Magnetic Bearing System." In AETA 2015: Recent Advances in Electrical Engineering and Related Sciences, 519–29. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27247-4_44.

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Mabrouk, Abdelileh, Olfa Ksentini, Nabih Feki, Mohamed Slim Abbes, and Mohamed Haddar. "LQR Optimization of an Eight-Pole Radial Active Magnetic Bearing System." In Lecture Notes in Mechanical Engineering, 606–15. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-14615-2_68.

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Castellanos Molina, Luis M., Renato Galluzzi, Angelo Bonfitto, Salvatore Circosta, and Ricardo A. Ramirez-Mendoza. "Grey-Box Identification of a Cone-Shaped Active Magnetic Bearing System." In Advances in Automation and Robotics Research, 148–63. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-90033-5_17.

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Yue, Zhuangzhuang, Huimin Ouyang, Guangming Zhang, Lei Mei, and Xin Deng. "Unbalance Suppression for Active Magnetic Bearing Rotor System Based on Disturbance Observer." In Proceedings of the 11th International Conference on Modelling, Identification and Control (ICMIC2019), 249–61. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0474-7_24.

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Yang, Kuang-Shine, and Chi-Cheng Cheng. "Robust Adaptive Control for Circuit-controlled Active Magnetic Bearing with Flywheel System." In 2011 International Conference in Electrics, Communication and Automatic Control Proceedings, 721–28. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-8849-2_91.

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Bisht, Shishir, Nitin Kumar Gupta, and G. D. Thakre. "Control Techniques and Failure Mode of Active Magnetic Bearing in Machine Tool System." In Lecture Notes in Mechanical Engineering, 45–53. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5151-2_5.

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Soni, Tukesh, J. K. Dutt, and A. S. Das. "Stability of Parametrically Excited Active Magnetic Bearing Rotor System Due to Moving Base." In Lecture Notes in Mechanical Engineering, 293–305. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5701-9_24.

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Conference papers on the topic "Active magnetic bearing system"

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Overstreet, Ross W., George T. Flowers, and Gyorgy Szasz. "Design and Testing of a Permanent Magnet Biased Active Magnetic Bearing." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8282.

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Abstract Magnetic bearings provide rotor support without direct contact. There is a great deal of current interest in using magnetic bearings for active vibration control. Conventional designs use electrical current to provide the bias flux, which is an integral feature of most magnetic bearing control strategies. Permanent magnet biased systems are a relatively recent innovation in the field of magnetic bearings. The bias flux is supplied by permanent magnets (rather than electrically) allowing for significant decreases in resistance related energy losses. The use of permanent magnet biasing in homopolar designs results in a complex flux flow path, unlike conventional radial designs which are much simpler in this regard. In the current work, a design is developed for a homopolar permanent magnet biased magnetic bearing system. Specific features of the design and results from experimental testing are presented and discussed. Of particular interest is the issue of reduction of flux leakage and more efficient use of the permanent magnets.
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Belskii, Grigorii V., Aleksandr P. Rastorguev, and Aleksandr A. Lyamkin. "Active Magnetic Bearing System Research." In 2019 III International Conference on Control in Technical Systems (CTS). IEEE, 2019. http://dx.doi.org/10.1109/cts48763.2019.8973368.

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Wajnert, D., and J. Zimon. "Control system design for active magnetic bearing." In 2009 2nd International Students Conference on Electrodynamic and Mechatronics (SCE 11). IEEE, 2009. http://dx.doi.org/10.1109/iscon.2009.5156103.

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Lee, Chong-Won, Young-Ho Ha, Cheol-Soon Kim, and Chee-Young Joh. "Modal Testing and Parameter Identification of Active Magnetic Bearing System." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0502.

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Abstract Complex modal testing is employed for parameter identification of a four-axis active magnetic bearing system. In the test, magnetic bearings are used as exciters while the system is in operation. The experimental results show that the directional frequency response function, which is properly defined in the complex domain, is a powerful tool for identification of bearing as well as modal parameters.
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Saket, Fawaz Y., M. Necip Sahinkaya, and Patrick S. Keogh. "Touchdown Bearing Contact Forces in Magnetic Bearing Systems." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95510.

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Under contact-free levitation, rotors supported by active magnetic bearings have many advantages such as allowing near frictionless rotation and high rotational speeds. They also provide the designer the capability to achieve increased machine power density. However, magnetic bearings possess limited load capacity and operate under active control. Under certain operational conditions, the load capacity may be exceeded or a transient fault may occur. The rotor may then make contact with touchdown bearings and the ensuing rotor dynamics may result in transient or sustained contact dynamics. The magnetic bearings may have the capability to restore contact-free levitation, though this will require appropriate control strategies to be devised. An understanding of the contact dynamics is required, together with the relationship between these and applied magnetic bearing control forces. This paper describes the use of a contact force measurement system to establish the force relationship. The contact force components measured by the system are calibrated against forces applied by an active magnetic bearing. The data generated can be used to validate non-linear dynamic system models and aid the design of control action to minimize or eliminate contact forces.
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Kim, Hyun-Sik, Ha-Yong Kim, Chong-Won Lee, and Tae-Ha Kang. "Stabilization of Active Magnetic Bearing System Subject to Base Motion." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48546.

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The active magnetic bearing (AMB) systems mounted in moving vehicles are exposed to the disturbances due to the base motion, often leading to malfunction or damage as well as inaccurate positioning of the systems. Thus, in the controller design of such AMB systems, robustness to base disturbances becomes an essential requirement. In this study, effective control schemes are proposed for the homo-polar AMB system, which uses permanent magnets for generation of bias magnetic flux, when it is subject to base motion, and its control performance is experimentally evaluated. The base motion of AMB system is modeled as the dynamic disturbances in the gravity and base excitation forces. To effectively compensate for the disturbances, the angle feed-forward controller based on the inverse dynamic model and the acceleration feed-forward controller based on the normalized filtered-X LMS algorithm and the inverse dynamic model are proposed. The performance test of the prototype AMB system is carried out, when the system is mounted on a six degrees-of-freedom motion platform. The experimental results show that the performance of the proposed controllers for the AMB system is satisfactory in compensating for the disturbances due to the base motion.
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Russell, Thomas E., Crystal Heshmat, and Dennis Locke. "Hybrid Magnetic/Foil Bearing System for an Oil-Free Thrust Bearing Test Rig." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0025.

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A novel, high-speed, high temperature, oil-free, foil thrust bearing test rig has been developed with a critical element being a double-acting, active magnetic thrust bearing. The magnetic thrust bearing is used to react against loads applied to the foil thrust bearing under test. The magnetic bearing has the capability of reacting against thrust loads of up to 2224 N (500 pounds) at speeds to 80,000 rpm, while the rotor is supported by foil journal bearings. Two issues that are especially challenging for this test rig are magnetic material selection and the electronic control system. The magnetic material selection is critical due to the high centrifugal stresses that occur at 80,000 rpm. The electronic control system must handle the non-linear variation in stiffness and damping that is seen by the magnetic thrust bearing as the foil thrust bearing is loaded, as well as maintain rotor system stability as the foil bearing is purposefully overloaded to the point of failure to discover maximum load and performance capabilities. This paper describes the design of the active magnetic thrust bearing, the material selection process, and the development of a digital signal processor based control system. Typical experimental data obtained during operation of the test rig will also be presented.
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Li, Peichao, M. Necip Sahinkaya, and Patrick S. Keogh. "Active Recovery of Contact-Free Levitation in Magnetic Bearing Systems." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70641.

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The use of magnetic bearings allows rotor dynamic systems to be developed for high speed applications, including low pressure/vacuum environments. They provide an alternative to conventional journal, rolling element and gas bearings. The benefits of using magnetic bearings are well documented in terms of low friction operation, together with controllable dynamic characteristics such as stiffness and damping. Magnetic bearings are usually equipped with touchdown bearings to protect the system in cases of power failure, transient loadings, system faults or unexpected influences that may induce system control malfunction. A rotor assembly invariably exhibits residual unbalance due to manufacturing imperfections. The underlying unbalance forces have an influence of the rotor dynamics that arise from contact between a rotor and a touchdown bearing. When considered with the system dynamics, larger unbalance tends to increase the possibility that a rotor will be able to remain in persistent contact with a touchdown bearing. A system has therefore been developed in which the touchdown bearings may be actuated so as to induce the rotor to return to contact-free levitation. This paper provides an assessment of the touchdown bearing motions that will realistically achieve this goal.
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Chen, Seng-Chi, Van-Sum Nguyen, Dinh-Kha Le, and Ming-Mao Hsu. "ANFIS controller for an Active Magnetic Bearing system." In 2013 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE). IEEE, 2013. http://dx.doi.org/10.1109/fuzz-ieee.2013.6622360.

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Khader, Shahbaz A., Bin Liu, and Johan Sjoberg. "System identification of Active Magnetic Bearing for commissioning." In 2014 6th International Conference on Modelling, Identification and Control (ICMIC). IEEE, 2014. http://dx.doi.org/10.1109/icmic.2014.7020767.

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Reports on the topic "Active magnetic bearing system"

1

Hagler, L. A HYBRID PASSIVE/ACTIVE MAGNETIC BEARING SYSTEM. Office of Scientific and Technical Information (OSTI), May 2004. http://dx.doi.org/10.2172/15014167.

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Smith, David V., Jeffrey D. Phillips, and S. R. Hutton. Active Tensor Magnetic Gradiometer System. Fort Belvoir, VA: Defense Technical Information Center, November 2007. http://dx.doi.org/10.21236/ada603921.

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Popov, Emilian. Computing of Fluidic Forces in Rotating Cylinders with Application to Active Magnetic Bearing Control. Office of Scientific and Technical Information (OSTI), February 2022. http://dx.doi.org/10.2172/1846523.

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Choi, Heeju, and Alan Palazzolo. Ultra High-Temperature Magnetic Bearing System for s-CO<sub>2</sub> Turbines/Expanders. Office of Scientific and Technical Information (OSTI), June 2022. http://dx.doi.org/10.2172/1873658.

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