Unity Sliding Mode Controller Design for Active Magnetic Bearings System
Active Magnetic Bearings (AMBs) are progressively being implemented in a wide variety of applications. Their exclusive appealing features make them suitable for solving traditional rotor-bearing problems using novel design approaches for rotating machinery. In this paper, a linearized uncertain mod...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Baghdad
2015-06-01
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| Series: | Journal of Engineering |
| Subjects: | |
| Online Access: | http://joe.uobaghdad.edu.iq/index.php/main/article/view/416 |
| _version_ | 1797760848904585216 |
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| author | Safanah M. Raafat, Ass. Prof. Dr. Shibly Ahmed Al-Samarraie, Ass. Prof. Dr. Ali M. Mahmood, Instructor |
| author_facet | Safanah M. Raafat, Ass. Prof. Dr. Shibly Ahmed Al-Samarraie, Ass. Prof. Dr. Ali M. Mahmood, Instructor |
| author_sort | Safanah M. Raafat, Ass. Prof. Dr. |
| collection | DOAJ |
| description | Active Magnetic Bearings (AMBs) are progressively being implemented in a wide variety of applications. Their exclusive appealing features make them suitable for solving traditional rotor-bearing problems using novel design approaches for rotating machinery. In this paper, a linearized uncertain model of AMBs is utilized to develop a nonlinear sliding mode controller based on Lyapunov function for the electromechanical system. The controller requires measurements of the rotor displacements and their derivatives. Since the control law is discontinuous, the proposed controller can achieve a finite time regulation but with the drawback of the chattering problem. To reduce the effect of this problem, the gain of the unite vector term is evaluated as a function to state variables. As a result the proposed discontinuous controller regulates the state to the origin in a finite time in spite of the uncertainty in system model and the presence of external disturbances. These results are demonstrated via numerical simulations. In addition the chattering in system response in these results is within the acceptable range. |
| first_indexed | 2024-03-12T19:04:28Z |
| format | Article |
| id | doaj.art-a35a4003e0cc4d27a50c741e8b344499 |
| institution | Directory Open Access Journal |
| issn | 1726-4073 2520-3339 |
| language | English |
| last_indexed | 2024-03-12T19:04:28Z |
| publishDate | 2015-06-01 |
| publisher | University of Baghdad |
| record_format | Article |
| series | Journal of Engineering |
| spelling | doaj.art-a35a4003e0cc4d27a50c741e8b3444992023-08-02T06:23:45ZengUniversity of BaghdadJournal of Engineering1726-40732520-33392015-06-01216Unity Sliding Mode Controller Design for Active Magnetic Bearings SystemSafanah M. Raafat, Ass. Prof. Dr.0Shibly Ahmed Al-Samarraie, Ass. Prof. Dr.1Ali M. Mahmood, Instructor2Control & Systems Eng. Dept. University of TechnologyControl & Systems Eng. Dept. University of TechnologyControl & Systems Eng. Dept. University of TechnologyActive Magnetic Bearings (AMBs) are progressively being implemented in a wide variety of applications. Their exclusive appealing features make them suitable for solving traditional rotor-bearing problems using novel design approaches for rotating machinery. In this paper, a linearized uncertain model of AMBs is utilized to develop a nonlinear sliding mode controller based on Lyapunov function for the electromechanical system. The controller requires measurements of the rotor displacements and their derivatives. Since the control law is discontinuous, the proposed controller can achieve a finite time regulation but with the drawback of the chattering problem. To reduce the effect of this problem, the gain of the unite vector term is evaluated as a function to state variables. As a result the proposed discontinuous controller regulates the state to the origin in a finite time in spite of the uncertainty in system model and the presence of external disturbances. These results are demonstrated via numerical simulations. In addition the chattering in system response in these results is within the acceptable range.http://joe.uobaghdad.edu.iq/index.php/main/article/view/416Active Magnetic Bearings (AMB), finite time regulation, linearized uncertain model, sliding mode controller, matching conditions. |
| spellingShingle | Safanah M. Raafat, Ass. Prof. Dr. Shibly Ahmed Al-Samarraie, Ass. Prof. Dr. Ali M. Mahmood, Instructor Unity Sliding Mode Controller Design for Active Magnetic Bearings System Journal of Engineering Active Magnetic Bearings (AMB), finite time regulation, linearized uncertain model, sliding mode controller, matching conditions. |
| title | Unity Sliding Mode Controller Design for Active Magnetic Bearings System |
| title_full | Unity Sliding Mode Controller Design for Active Magnetic Bearings System |
| title_fullStr | Unity Sliding Mode Controller Design for Active Magnetic Bearings System |
| title_full_unstemmed | Unity Sliding Mode Controller Design for Active Magnetic Bearings System |
| title_short | Unity Sliding Mode Controller Design for Active Magnetic Bearings System |
| title_sort | unity sliding mode controller design for active magnetic bearings system |
| topic | Active Magnetic Bearings (AMB), finite time regulation, linearized uncertain model, sliding mode controller, matching conditions. |
| url | http://joe.uobaghdad.edu.iq/index.php/main/article/view/416 |
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