LS-SVM Inverse System Decoupling Control Strategy of a Bearingless Induction Motor Considering Stator Current Dynamics
| Autor: | Ziyuan Li, Wenshao Bu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
General Computer Science
Stator Computer science 02 engineering and technology 01 natural sciences law.invention inverse system decoupling law Control theory 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Torque General Materials Science 010302 applied physics Inverse system Bearingless induction motor system LS-SVM Rotor (electric) Multivariable calculus 020208 electrical & electronic engineering General Engineering Decoupling (cosmology) Nonlinear system Electromagnetic coil dynamics of stator current Control system lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:TK1-9971 Induction motor Decoupling (electronics) |
| Zdroj: | IEEE Access, Vol 7, Pp 132130-132139 (2019) |
| ISSN: | 2169-3536 |
| Popis: | The bearingless induction motor (BL-IM) is a multivariable, nonlinear and strongly coupled object, in order to achieve its dynamic decoupling control with high performance, on the basis of the least square support vector machine(LS-SVM) principle, a novel LS-SVM inverse system decoupling control strategy is proposed. Firstly, under the conditions of taking the stator current dynamics of torque windings into account, the state equations of the BL-IM system are established. Secondly, based on the approximation and identification fitting ability of the LS-SVM to arbitrary nonlinear function, the inverse system mathematical model of the BL-IM system considering the stator current dynamics is trained and obtained. After that, according to the decoupling principle of inverse system, the BL-IM system is decoupled into four second-order pseudo-linear integral subsystems, include a motor speed subsystem, a rotor flux-linkage subsystem and two radial displacement component subsystems. At the end, the comprehensive simulation analysis of the LS-SVM inverse decoupling control system are carried out. From the simulation results, it can be known that the dynamic decoupling control among the motor speed, rotor flux-linkage and two radial displacement components can be realized, meanwhile after considering the dynamics of the stator current, the LS-SVM inverse decoupling control system of BL-IM has the characteristics of fast response and strong anti-interference ability. |
| Databáze: | OpenAIRE |
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