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Control system with a non-parametric predictive algorithm for a high-speed rotating machine with magnetic bearings

2021; De Gruyter Open; Linguagem: Inglês

10.24425/bpasts.2021.138998

2300-1917

Paulina Kurnyta-Mazurek, Tomasz Szolc, Maciej Henzel, Krzysztof Falkowski,

Diverse Industrial Engineering Technologies

operation.Therefore, a significant problem comes down to the development of modern bearing designs with high diagnostic capacity.Such possibilities can be obtained by means of an active magnetic suspension system.Applying the active magnetic bearing technology in highspeed rotating machinery can overcome the physical limitations of the classic bearings.This technology allows us for a decrease of stiffness and for an increase of the damping ability of the radial bearings, which in turn reduces critical rotor speed values.Active magnetic bearings allow for precise control of the rotor position and enable monitoring "online", diagnosing and identifying the high-speed rotating machines operation [10].An effective control system, with a proper controller, should be designed to ensure strictly defined control quality indicators.In general, magnetic bearing control systems are mostly limited to applying proportional-integral-derivative (PID) controllers [11,12].In monograph [11], overviews of magnetic bearings and bearingless electric drives are presented.The principle of operation and mathematical models of active magnetic suspensions (AMS) and the controller design based on the PID algorithm are also described.Additionally, in that monograph, synchronous and asynchronous bearingless electric motors are presented in detail.Finally, monograph [12] discusses the magnetic bearing design procedure, the advantages of magnetic bearing systems in rotating machines, PID controller design methodology for the magnetic suspension control systems and their hardware implementation.Furthermore, paper [13] presents a computer model of an active magnetic bearing used to determine a distribution of the INTRODUCTIONIn recent years, innovative bearing technologies were developed and implemented in many industrial applications.Novel solutions, such as gas bearings [1] and magnetic bearings solved many restrictions and disadvantages of classic rotor-bearing systems during operational practice.Immense efforts were undertaken to implement the magnetic support technology in high-speed rotating machinery.This technology has invaluable advantages in friction reduction in turbomachinery, compressors, generators, etc. [2-6].Compared with classical mechanical bearings, the magnetic bearing technology provides benefits such as the low amplitude level of rotor lateral vibrations, high durability, no mechanical contact between operation elements, i.e. the rotor and the stator, and long-term high-speed running ability [7,8].These features give the magnetic bearings considerable potential to become a key element in rotating machines [9].In classic rotating machines, some inefficiency occurring during their operation, e.g.damages of the bearing elements without additional (external) diagnostic systems, is often almost undetectable.Therefore, careful selection of the bearing system to support a high-speed rotor is carried out already at the design stage.This is usually based on the load capacity, durability and operating condition parameters.Unfortunately, bearings are still often damaged without previous symptoms arising during