Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor Systems
This paper describes an exact linearizing control approach for a distributed actuation magnetic bearing (DAMB) supporting a thin-walled rotor. The radial DAMB design incorporates a circular array of compact electromagnetic actuators with multi-coil winding scheme optimized for supporting thin-walled...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Actuators |
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| Online Access: | https://www.mdpi.com/2076-0825/9/4/99 |
| _version_ | 1797551630556594176 |
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| author | Chakkapong Chamroon Matthew O.T. Cole Wichaphon Fakkaew |
| author_facet | Chakkapong Chamroon Matthew O.T. Cole Wichaphon Fakkaew |
| author_sort | Chakkapong Chamroon |
| collection | DOAJ |
| description | This paper describes an exact linearizing control approach for a distributed actuation magnetic bearing (DAMB) supporting a thin-walled rotor. The radial DAMB design incorporates a circular array of compact electromagnetic actuators with multi-coil winding scheme optimized for supporting thin-walled rotors. A distinguishing feature is that both the x and y components of the radial bearing force are coupled with all four of the supplied coil currents and so a closed form solution for the linearizing equations cannot be obtained. To overcome this issue, a gradient-based root-finding algorithm is proposed to solve the linearizing equations numerically in real-time. The proposed method can be applied with any chosen constraints on current values to achieve low RMS values while avoiding zero-current operating points. The approach is implemented and tested experimentally on a rotor system comprising two radial DAMBs and a uniform cylindrical shell rotor. The results show that the method achieves more accurate reproduction of demanded bearing forces, thereby simplifying the rotor suspension control design and providing improved stability and vibration control performance compared with implementations based on operating point linearization. |
| first_indexed | 2024-03-10T15:48:52Z |
| format | Article |
| id | doaj.art-77a66bd99be44187bad227fccb116535 |
| institution | Directory Open Access Journal |
| issn | 2076-0825 |
| language | English |
| last_indexed | 2024-03-10T15:48:52Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj.art-77a66bd99be44187bad227fccb1165352023-11-20T16:15:40ZengMDPI AGActuators2076-08252020-10-01949910.3390/act9040099Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor SystemsChakkapong Chamroon0Matthew O.T. Cole1Wichaphon Fakkaew2Center for Mechatronic Systems and Innovation, Department of Mechanical Engineering, Chiang Mai University, Chiang Mai 50200, ThailandCenter for Mechatronic Systems and Innovation, Department of Mechanical Engineering, Chiang Mai University, Chiang Mai 50200, ThailandSchool of Engineering, University of Phayao, Phayao 56000, ThailandThis paper describes an exact linearizing control approach for a distributed actuation magnetic bearing (DAMB) supporting a thin-walled rotor. The radial DAMB design incorporates a circular array of compact electromagnetic actuators with multi-coil winding scheme optimized for supporting thin-walled rotors. A distinguishing feature is that both the x and y components of the radial bearing force are coupled with all four of the supplied coil currents and so a closed form solution for the linearizing equations cannot be obtained. To overcome this issue, a gradient-based root-finding algorithm is proposed to solve the linearizing equations numerically in real-time. The proposed method can be applied with any chosen constraints on current values to achieve low RMS values while avoiding zero-current operating points. The approach is implemented and tested experimentally on a rotor system comprising two radial DAMBs and a uniform cylindrical shell rotor. The results show that the method achieves more accurate reproduction of demanded bearing forces, thereby simplifying the rotor suspension control design and providing improved stability and vibration control performance compared with implementations based on operating point linearization.https://www.mdpi.com/2076-0825/9/4/99active magnetic bearingslow bias currentvibration controlthin-walled structurenonlinear modeling |
| spellingShingle | Chakkapong Chamroon Matthew O.T. Cole Wichaphon Fakkaew Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor Systems Actuators active magnetic bearings low bias current vibration control thin-walled structure nonlinear modeling |
| title | Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor Systems |
| title_full | Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor Systems |
| title_fullStr | Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor Systems |
| title_full_unstemmed | Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor Systems |
| title_short | Linearizing Control of a Distributed Actuation Magnetic Bearing for Thin-Walled Rotor Systems |
| title_sort | linearizing control of a distributed actuation magnetic bearing for thin walled rotor systems |
| topic | active magnetic bearings low bias current vibration control thin-walled structure nonlinear modeling |
| url | https://www.mdpi.com/2076-0825/9/4/99 |
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