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Finite element analysis and optimization of active magnetic bearings for contrarotating coaxial rotor system

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Title Finite element analysis and optimization of active magnetic bearings for contrarotating coaxial rotor system
 
Creator Singh, Shashank Shekhar
Kumar, Punit
 
Subject Active magnetic bearing
Coaxial rotor
Genetic Algorithm
Optimization
Rotordynamics
 
Description 470-480
This paper presents the design, analysis and optimization of Active Magnetic Bearings (AMBs) to support the inner rotor
in a contra-rotating coaxial rotor system. An FEM based rotordynamic model is developed using 8-dof Timoshenko beam
elements assuming both inner and outer rotors to be flexible. The dynamic response of this system due to an unbalanced
force is used in one of the constraints of a multi-objective genetic algorithm for controlling the vibration amplitude within
10% of the air gap. A maximum reduction of 46.9% in the amplitude peak is obtained under the present conditions. Hence,
this work also offers a tool useful in touch-down bearing design. The PD controller gains are found to govern the stiffness
and damping properties of the AMB. On increasing the mass unbalance by a factor of 2.5, number of turns, pole width and
maximum current are found to increase by 52.9%, 29.4% and 71.67% respectively.
 
Date 2022-08-16T05:20:50Z
2022-08-16T05:20:50Z
2022-08
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscpr.res.in/handle/123456789/60283
https://doi.org/10.56042/ijems.v29i4.47238
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJEMS Vol.29(4) [AUG 2022]