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Title
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Detailed modelling and LQG\LTR control of a 2-DOF radial active magnetic bearing for rigid rotor
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Sub-Title |
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Subject |
Active magnetic bearings, Closed-loop control, Frequency response analysis, Mathematical modelling of electro-magnets, PID, LQG\LTR, Robust controller
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Sub-Subject |
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Author |
Muhammad Abdul Ahad, Nadeem Iqbal, Sarvat M. Ahmad
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Publish Year |
2021 |
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Supervisor |
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Diss#. |
https://doi.org/10.1007/s40430-021-02951-4 |
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Pages |
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Text Language |
English |
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Accession |
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Library Section |
Research Article |
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Abstract |
The paper presents detailed modelling of rotor, electro-magnetic actuators, and accompanying electronics of an in-housedeveloped
active magnetic bearing (AMB) test rig in a unified manner. The work is the extension of our previous work on a
1-degree-of-freedom (DOF) cantilever beam while in here, the challenging problem of levitating and spinning a 2 DOF rotor
on a pair of opposing EMs is investigated. Classical three-term PID controllers are designed as a benchmark controllers, in
frequency domain to stabilize the 2-DOF open-loop unstable system, and the performance is compared with the modern
state-space control strategies, namely Linear Quadratic Gaussian (LQG) and combined LQG-Loop Transfer Recovery (LQG\ LTR) compensators. The tuned robust controllers are deployed on a custom-designed hardware using Simulink Real-Time software. Dual axes controllers performed reasonably well when subjected to static and dynamic tests both in simulation and in experimentation. The key time domain p
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