Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

Partnerzy

K. Falkowski

Military University of Technology (PL)

Ostatnie publikacje
1.  Kurnyta-Mazurek P., Szolc T., Henzel M., Falkowski K., Control system with a non-parametric predictive algorithm for a high-speed rotating machine with magnetic bearings, BULLETIN OF THE POLISH ACADEMY OF SCIENCES: TECHNICAL SCIENCES, ISSN: 2300-1917, DOI: 10.24425/bpasts.2021.138998, Vol.69, No.6, pp.e138998-1-9, 2021

Streszczenie:
This paper deals with research on the magnetic bearing control systems for a high-speed rotating machine. Theoretical and experimental characteristics of the control systems with the model algorithmic control (MAC) algorithm and the proportional-derivative (PD) algorithm are presented. The MAC algorithm is the non-parametric predictive control method that uses an impulse response model. A laboratory model of the rotor-bearing unit under study consists of two active radial magnetic bearings and one active axial (thrust) magnetic bearing. The control system of the rotor position in air gaps consists of the fast prototyping control unit with a signal processor, the input and output modules, power amplifiers, contactless eddy current sensors and the host PC with dedicated software. Rotor displacement and control current signals were registered during investigations using a data acquisition (DAQ) system. In addition, measurements were performed for various rotor speeds, control algorithms and disturbance signals generated by the control system. Finally, the obtained time histories were presented, analyzed and discussed in this paper.

Słowa kluczowe:
magnetic bearing; predictive algorithm; high speed rotating machine

Afiliacje autorów:
Kurnyta-Mazurek P. - Military University of Technology (PL)
Szolc T. - IPPT PAN
Henzel M. - Military University of Technology (PL)
Falkowski K. - Military University of Technology (PL)
100p.
2.  Szolc T., Falkowski K., Kurnyta-Mazurek P., Design of a combined self-stabilizing electrodynamic passive magnetic bearing support for the automotive turbocharger rotor, JOURNAL OF VIBRATION AND CONTROL, ISSN: 1077-5463, DOI: 10.1177/1077546320933486, pp.1-12, 2020

Streszczenie:
The purpose of this study is to create a concept for what would be a structurally simple and perationally robust support for the automotive turbocharger rotor in electrodynamic passive magnetic bearings. Because this kind of magnetic suspension-in its fundamental version-is dynamically unstable, to avoid the disadvantages contained therein, what is being proposed is the addition of external damping through the employment of the newly designed combined self-stabilizing electrodynamic passive magnetic bearing. The electromagnetic stiffness and damping characteristics of combined electrodynamic passive magnetic bearings have been determined for various shaft rotational speeds by means of the advanced 3D finite element method. In this study, a dynamic interaction between the turbocharger rotor shaft and the passive magnetic suspension is proposed as a support for both the fundamental electrodynamic passive magnetic bearings and the suggested combined self-stabilizing passive magnetic bearings. Here, the main attention is focused on the asymptotic stability of both the rotor shaft suspension variants. The additional damping magnitudes required to stabilize the most sensitive lateral eigenmodes of the object under consideration have been determined by means of the Routh-Hurwitz stability criterion.

Słowa kluczowe:
rotor dynamics, combined electrodynamic passive magnetic bearings, turbocharger flexible rotor shaft, stability analysis, stabilizing damping magnitude

Afiliacje autorów:
Szolc T. - IPPT PAN
Falkowski K. - Military University of Technology (PL)
Kurnyta-Mazurek P. - Military University of Technology (PL)
70p.
3.  Szolc T., Falkowski K., Henzel M., Kurnyta-Mazurek P., Determination of parameters for a design of the stable electro-dynamic passive magnetic support of a high-speed flexible rotor, BULLETIN OF THE POLISH ACADEMY OF SCIENCES: TECHNICAL SCIENCES, ISSN: 0239-7528, DOI: 10.24425/bpas.2018.125719, Vol.67, No.1, pp.91-105, 2019

Streszczenie:
Electro-dynamic passive magnetic bearings are now viewed as a feasible option when looking for support for high-speed rotors. Nevertheless, because of the skew-symmetrical visco-elastic properties of such bearings, they are prone to operational instability. In order to avoid this, the paper proposes the addition of external damping into the newly designed vibrating laboratory rotor-shaft system. This may be achieved by means of using simple passive dampers that would be found among the components of the electro-dynamic bearing housings along with magnetic dampers, which satisfy the operational principles of active magnetic bearings. Theoretical investigations are going to be conducted by means of a structural computer model of the rotor-shaft under construction, which will take into consideration its actual dimensions and material properties. The additional damping magnitudes required to stabilize the most sensitive lateral eigenmodes of the object under consideration have been determined by means of the Routh-Hurwitz stability criterion.

Słowa kluczowe:
rotor-dynamics, electrodynamic passive magnetic bearings, flexible rotor-shaft, active magnetic damper, stability analysis

Afiliacje autorów:
Szolc T. - IPPT PAN
Falkowski K. - Military University of Technology (PL)
Henzel M. - Military University of Technology (PL)
Kurnyta-Mazurek P. - Military University of Technology (PL)
100p.

Lista rozdziałów w ostatnich monografiach
1. 
Szolc T., Falkowski K., Mechanisms and Machine Science, rozdział: Dynamic analysis of the high-speed flexible rotors supported on the electrodynamic passive magnetic bearings, Springer International Publishing, 21, pp.1489-1500, 2015

Prace konferencyjne
1.  Szolc T., Falkowski K., The design of a combined, self-stabilizing electrodynamic passive magnetic bearing supporting high-speed rotors, SIRM 2019, 13th International Conference - DYNAMICS OF ROTATING MACHINERY, 2019-02-13/02-15, Copenhagen (DK), pp.272-281, 2019

Streszczenie:
The purpose of this paper is to create a concept of the structurally simple and operationally robust support of high-speed rotors in the electrodynamic passive magnetic bearings (EDPMB). Since this kind of a magnetic suspension in its fundamental version is dynamically unstable, in order to avoid such an essential disadvantage there is proposed the addition of external damping by the use of the newly designed combined, self-stabilizing electrodynamic passive magnetic bearing. The electromagnetic stiffness- and damping characteristics of the combined EDPMB have been determined for various shaft rotational speeds by means of the advanced 3D finite element method. The dynamic investigations are performed for a single-span, high-speed flexible rotor-shaft. In the computational part a dynamic interaction between the rotor-shaft and the passive magnetic suspension is carried out for a support in the fundamental EDPMBs and in the proposed combined, self-stabilizing passive magnetic bearings. Here, the main attention is focused on asymptotic stability of the both rotor-shaft suspension variants. In addition, for the considered rotor-shaft-bearing system amplitude-frequency characteristics of forced steady-state bending vibrations have been determined. By means of this investigation there is demonstrated a resonance suppression ability using the external damping generated by the proposed combined EDPMBs.

Słowa kluczowe:
magnetic bearing, electrodynamic passive magnetic bearings, EDPMB, rotor-shaft suspension, high-speed rotors

Afiliacje autorów:
Szolc T. - IPPT PAN
Falkowski K. - Military University of Technology (PL)
2.  Szolc T., Falkowski K., Henzel M., Kurtyna-Mazurek P., Passive and active stabilization of the electro-dynamic magnetic bearings supporting high-speed rotors, VITM 11, Vibrations In Rotating Machinery, IMechE, 2016-09-13/09-15, Machester (GB), pp.721-731, 2016

Streszczenie:
The electrodynamic passive magnetic bearings became now a very promising kind of support for high-speed rotors. Nevertheless, because of skew-symmetrical visco-elastic properties of such bearings, they are sensitive to operational instability. In order to avoid this disadvantage, in the paper there are proposed stabilization concepts reducing to an introduction of a sufficient magnitude of additional external damping into the vibrating rotor-shaft system. This purpose is going to be realized by means of simple and effective passive dampers built in the electrodynamic bearing housings as well as using heteropolar magnetic dampers which realize operational principles of the active magnetic bearing. The theoretical investigations are going to be carried out by means of a structural computer model of the rotor-shaft system, taking into consideration its full geometry and material properties.

Afiliacje autorów:
Szolc T. - IPPT PAN
Falkowski K. - Military University of Technology (PL)
Henzel M. - Military University of Technology (PL)
Kurtyna-Mazurek P. - Military University of Technology (PL)

Kategoria A Plus

IPPT PAN

logo ippt            ul. Pawińskiego 5B, 02-106 Warszawa
  +48 22 826 12 81 (centrala)
  +48 22 826 98 15
 

Znajdź nas

mapka
© Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk 2021