Experimental Validation and Sensorless Control of a 3-pole Active Magnetic Bearing System
碩士 === 國立中正大學 === 機械系 === 90 === 3-pole Active magnetic bearing (AMB) is discussed in this thesis for two types of mathematical models: current-controlled and voltage-controlled models. The controllers of experimental verification are based on the current-controlled model. For the strong nonlinearit...
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| Format: | Others |
| Language: | en_US |
| Published: |
2002
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| Online Access: | http://ndltd.ncl.edu.tw/handle/67920580077898021929 |
| Summary: | 碩士 === 國立中正大學 === 機械系 === 90 === 3-pole Active magnetic bearing (AMB) is discussed in this thesis for two types of mathematical models: current-controlled and voltage-controlled models. The controllers of experimental verification are based on the current-controlled model. For the strong nonlinearity of the 3-pole AMB, feedback linearization of the nonlinear system is proposed based on the special structure of the system model. Then the sliding mode control will be constructed on the feedback linearized system to against the model uncertainties. To modify the theoretic model to fit in with practical plant, the parameters of magnetic force model must be amended.
The observer design is based on the voltage-controlled model with dimensionless. Instead of expansive position sensors, the information of system states can be obtained from measuring coil currents. The results of simulations verify its practicability.
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