Numerical and Experimental Modal Control of Flexible Rotor Using Electromagnetic Actuator

Koroishi, Edson Hideki; Borges, Aércio Sebastião; Cavalini, Aldemir Ap; Steffen, Valder

doi:10.1155/2014/361418

Cited by 14 publications

(9 citation statements)

References 22 publications

(26 reference statements)

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“…The reduction of the unbalance response is between 70% and 78% at the first disk position and between 77% and 85% at the second disk position. Koroishi et al (2014) have also used an electromagnetic actuator, which is chosen to be part of a hybrid bearing on a flexible rotor. An LQR controller and a fuzzy modal control (FLC) are applied to demonstrate the effectiveness of each controller in attenuating rotor vibration.…”

Section: Introductionmentioning

confidence: 99%

Active vibration control of a rotor bearing system using flexible piezoelectric patch actuators

Brahem

Chouchane

Amamou

2020

Journal of Intelligent Material Systems and Structures

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Rotor vibration control is crucial for the reliability of rotating machines. This article applies active vibration control to reduce the vibration of a rotor bearing system using flexible piezoelectric patches as actuators mounted on the shaft external surface. The patches reduce the vibration due to unbalance forces by generating bending moments to counteract rotor deformation. An active vibration control system is designed based on a full-state linear quadratic regulator controller. Since proximity probes are used to measure the lateral vibrations of the rotor at few shaft positions, an observer is designed to estimate the unmeasured vibrations. The weighting matrices required by the linear quadratic regulator controller are selected by trial and error so that the displacement amplitudes are reduced to a minimum and the actuation voltages remain within the limitations defined by the manufacturer of the used patches. Simulated responses demonstrate the effectiveness of the designed controller in attenuating the lateral vibration of the rotor bearing system when using two actuating voltages. The vibration response is reduced for the steady-state condition and during run-up particularly at the first critical speed.

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Section: Introductionmentioning

confidence: 99%

Active vibration control of a rotor bearing system using flexible piezoelectric patch actuators

Brahem

Chouchane

Amamou

2020

Journal of Intelligent Material Systems and Structures

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“…The control of vibrations is attained by modifying the bearing properties accordingly to the excitation loads and operational conditions. A variety of bearing types (ball bearings, magnetic bearings, compressible and incompressible fluid-film bearings) combined with several actuator types (magnetic, piezoelectric, pneumatic, hydraulic) leads to a variety of mechatronic devices or simply active bearings [3,4,5,6,7,8,9]. Herein, an incompressible fluid-film bearing with hydraulic actuator, namely tilting-pad journal bearings with active lubrication [10,11,12], is theoretically as well as experimentally investigated.…”

Section: Introductionmentioning

confidence: 99%

Active tilting-pad journal bearings supporting flexible rotors: Part II–The model-based feedback-controlled lubrication

Salazar

Santos

2017

Tribology International

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This is part II of a twofold paper series dealing with the design and implementation of model-based controllers meant for assisting the hybrid and developing the feedback-controlled lubrication regimes in active tilting pad journal bearings (active TPJBs). In both papers theoretical and experimental analyses are presented with focus on the reduction of rotor lateral vibration. This part is devoted to synthesising model-based LQG optimal controllers (LQR regulator + Kalman Filter) for the feedback-controlled lubrication and is based upon the mathematical model of the rotor-bearing system derived in part I. Results show further suppression of resonant vibrations when using the feedback-controlled or active lubrication, overweighting the reduction already achieved with hybrid lubrication, thus improving the whole machine dynamic performance.

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“…Por Ąm, aparecem os atuadores que convertem os sinais de comando fornecidos pela unidade de controle em ações efetivas sobre o sistema. Como exemplo, pode-se mencionar a utilização de mancais híbridos contendo atuadores eletromagnéticos que operam a partir de diferentes estratégias de controle (KOROISHI et al, 2014).…”

Section: Controle De Vibraçõesunclassified

Controle de rotores flexíveis suportados por mancais magnéticos

Oliveira¹

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RESUMOO presente trabalho é dedicado à síntese de controladores utilizados em rotores supercríticos suportados por mancais magnéticos. Em primeiro lugar, construiu-se um modelo numérico/computacional em ambiente MATLAB/Simulink com base nas especiĄcações fornecidas pelo fabricante da bancada de e em conjunto com o processo de validação experimental, que resultou em um modelo representativo do comportamento dinâmico do sistema físico real. O passo seguinte foi a síntese de dois controladores PID; o primeiro trata-se de um controlador PI baseado no controlador fornecido pelo fabricante e, o segundo, é um controlador PID adaptativo. Ambos foram avaliados a partir de suas funções de transferência em malha fechada e sob o ponto de vista da sua reposta ao desbalanceamento, sendo esta conduzida de acordo com as diretrizes da norma API 684 e classiĄcada com base nos critérios deĄnidos na norma ISO 14839-2. Com base nestes resultados, foi possível selecionar o controlador com melhor desempenho para a criação de um metamodelo Kriging, que foi avaliado utilizando os mesmos critérios aplicados aos controladores PI e PID adaptativo. Com base nestes resultados, foi possível aĄrmar que a principal contribuição deste trabalho foi a sistematização da utilização de metamodelos Kriging para o estudo e projeto de rotores supercríticos suportados por mancais magnéticos. Palavras-chave: Mancais magnéticos, rotores flexíveis, PID, metamodelagem x OLIVEIRA, M. V. F., ABSTRACTThe present work is devoted to the development of controllers utilized in supercritical rotors supported by magnetic bearings. The Ąrst step was the conception of a numerical/computational model in the MATLAB/SIMULINK environment, as based on the speciĄcations provided by the test rig manufacturer. Following, this model was tested through an experimental validation process, resulting a mathematical model that represents closely the dynamic behavior of the actual physical system. Next step was the synthesis of two PID controllers, the Ąrst being a manufacturer-supplied PI controller and the second is an adaptive PID controller. Both the controllers were evaluated from their closed-loop transfer functions in the perspective of their corresponding imbalance responses, which was conducted according to API 684 guidelines and classiĄed as based on the criteria deĄned in the standard ISO 14839-2. Then, it was possible to select the best performing controller for the creation of a Kriging sorrogate model, which was evaluated by using the same criteria applied to the PID and adaptive PID controllers. The results obtained permit to state that the main contribution of the present research work was the systematization of the application of Kriging surrogate model on the study and design of supercritical rotors supported by magnetic bearings. Keywords: Magnetic bearings, flexible rotors, PID, surrogate model 5 CONCLUSÃO 106 REFERÊNCIAS 111 109Esta tese de doutoramento permitiu a realização das seguintes publicações: Artigos completos apresentados em congressos cientíĄcos

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Numerical and Experimental Modal Control of Flexible Rotor Using Electromagnetic Actuator

Cited by 14 publications

References 22 publications

Active vibration control of a rotor bearing system using flexible piezoelectric patch actuators

Active vibration control of a rotor bearing system using flexible piezoelectric patch actuators

Active tilting-pad journal bearings supporting flexible rotors: Part II–The model-based feedback-controlled lubrication

Controle de rotores flexíveis suportados por mancais magnéticos

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