文章基本信息

标题：Fractional Order PID Control of Rotor Suspension by Active Magnetic Bearings
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作者：Parinya Anantachaisilp ; Zongli Lin
期刊名称：Actuators
电子版ISSN：2076-0825
出版年度：2017
卷号：6
期号：1
页码：4
DOI：10.3390/act6010004
语种：English
出版社：MDPI Publishing
摘要：One of the key issues in control design for Active Magnetic Bearing (AMB) systems is the tradeoff between the simplicity of the controller structure and the performance of the closed-loop system. To achieve this tradeoff, this paper proposes the design of a fractional order Proportional-Integral-Derivative (FOPID) controller. The FOPID controller consists of only two additional parameters in comparison with a conventional PID controller. The feasibility of FOPID for AMB systems is investigated for rotor suspension in both the radial and axial directions. Tuning methods are developed based on the evolutionary algorithms for searching the optimal values of the controller parameters. The resulting FOPID controllers are then tested and compared with a conventional PID controller, as well as with some advanced controllers such as Linear Quadratic Gausian (LQG) and H ∞ controllers. The comparison is made in terms of various stability and robustness specifications, as well as the dimensions of the controllers as implemented. Lastly, to validate the proposed method, experimental testing is carried out on a single-stage centrifugal compressor test rig equipped with magnetic bearings. The results show that, with a proper selection of gains and fractional orders, the performance of the resulting FOPID is similar to those of the advanced controllers.
关键词：fractional order control; fractional order PID; rotor suspension; Active Magnetic Bearings; centrifugal compressor; evolutionary algorithm fractional order control ; fractional order PID ; rotor suspension ; Active Magnetic Bearings ; centrifugal compressor ; evolutionary algorithm